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OPHIR StarBright User Manual

Laser power/energy meter
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Laser Power / Energy Meter User Manual

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Summary of Contents for OPHIR StarBright

  • Page 1 StarBright StarBright Laser Power / Energy Meter User Manual...
  • Page 2 この度はオフィール社のStarBrightディスプレイをご購入頂き誠にありがとうございます。 スターブライト本体のヘルプ機能が充実しており、マニュアルなしでも操作が簡単に行える ようになっていますが、操作などご不明点ございましたら、お手数ですが下記までお問い 合わせお願いいたします。 Youtubeでも簡単な機能説明についてご覧いtだけます。...

  • Page 3: Table Of Contents

    Using StarBright with Thermopile Type Sensors ..........7 2.2.2 Using StarBright to Measure Laser Power ............7 2.2.3 Using StarBright to Measure Single Shot Energy ..........7 Photodiode Sensors ....................... 8 2.3.1 Using StarBright with Photodiode Type Sensors ..........8 2.3.2...
  • Page 4 Pyroelectric Sensors – Method of Operation .............. 44 Photodiode Energy Sensors – Method of Operation ..........44 Measuring Pulses of High Energy Density ..............45 Operation of StarBright with Pyroelectric and Photodiode Energy Sensors ....45 8.4.1 Zeroing the Energy Sensor Against the StarBright Meter ....... 46 8.4.2...
  • Page 5 12.4 PD300RM ........................92 12.4.1 Irradiance Measurement ................. 93 12.4.2 Dosage Measurement ..................94 12.4.3 Offset ....................... 94 12.4.4 Function Limitations ..................94 Circuit Description ......................95 13.1 Analog Module ......................95 13.1.1 Analog Circuit ....................95 StarBright User Manual...
  • Page 6 14.1 Updating Sensor Calibration Factors ................97 14.2 Calibration of Thermopile Sensors ................98 14.2.1 Absorber Types and Method of Calibration of Ophir Power Meters ....98 14.2.2 Surface Absorbers .................... 98 14.2.3 Linearity and Accuracy of Ophir Thermopile Sensors........99 14.2.4 Updating Thermopile Sensor Calibration Factors ..........

  • Page 7: Introduction

    You can also zero the StarBright at the touch of a button. StarBright is capable of logging data onto a USB Flash Drive (Disk On Key), as well as real-time reporting of data via USB to Ophir’s StarLab application to display and process the information.

  • Page 8: Quick Reference

    This toggling will be performed by briefly pressing the On/Off switch after the StarBright has been switched on. 3. To switch the StarBright off, press the On/Off switch and hold it for ~ 2 seconds until the display blanks.

  • Page 9: Thermopile Sensors

    Thermopile Sensors 2.2.1 Using StarBright with Thermopile Type Sensors 1. Plug in the Thermopile sensor. StarBright will reconfigure itself to work with the attached sensor. 2. All of the sensor’s measurement parameters are shown on the main screen. Use the Navigation keys to select and change the parameters.

  • Page 10: Photodiode Sensors

    Photodiode Sensors 2.3.1 Using StarBright with Photodiode Type Sensors 1. Plug in the Photodiode sensor. StarBright will reconfigure itself to work with the attached sensor. 2. All of the sensor’s measurement parameters are shown on the main screen. Use the Navigation keys to select and change the parameters.

  • Page 11: Zeroing Instrument Against Sensor

    Quick Reference 2.4.2 Zeroing Instrument against Sensor For most accurate calibration, you should zero the energy sensor against the StarBright it is being used with: 1. Make sure the sensor is in a quiet environment and not subject to pulsed radiation.

  • Page 12: Energy, Average Power, Or Exposure Measurement

    2. Go to Graph Type and select Needle. Return to the main display screen. 3. To expand the needle graph ±5x of the present reading, press Zoom. Press Zoom again to return the needle range to full scale. StarBright User Manual...
  • Page 13 1. When in Track mode, press Menu and enter Display. 2. Go to Graph Type and select Stability. Return to the main display screen. 3. Press 1 sec to change the time interval (to 3, 10, 30 seconds or 1 minute). StarBright User Manual...

  • Page 14: Math Functions

    Logging Data to a File for Upload to PC You can log your measurement data to a file for upload to PC by connecting an external storage device to the USB port of the StarBright meter. For details, see Logging Data to a File for Upload to...

  • Page 15: Using The Starbright Display Unit

    You can also zero the StarBright at the touch of a button. StarBright is capable of logging data onto a USB Flash Drive (Disk On Key), as well as real-time reporting of data via USB to Ophir’s StarLab application to display and process the information.

  • Page 16: Starbright Display Unit Components

    Using the StarBright Display Unit StarBright Display Unit Components ‎ Figure 3 -1 below displays the StarBright display unit, displaying the main screen with some sample measurements. ‎ Figure 3 -1 StarBright Meter/Display Unit – Front View The StarBright is equipped with: ...

  • Page 17: Starbright Hardware Components/Interfaces

    3.3.1 Sensor Input The Sensor Input, located in the center of the StarBright real panel, is the socket where you insert the 15 pin D type connector of the measuring sensor cable in order to connect the sensor to the ‎...

  • Page 18: Lcd Display And Backlight

    Using the StarBright Display Unit 3.3.2 LCD Display and Backlight The StarBright screen is a QVGA 320x240 pixel color TFT LCD. It can be driven in one of two full color modes or in one. The LCD backlight is actually a set of LEDs that illuminate the display from behind. Because the StarBright uses a TFT color display, the backlight must be constantly on.

  • Page 19: On-Off Switch/Backlight Control

    Using the StarBright Display Unit 3.3.5 On-Off Switch/Backlight Control This section describes how to switch on/off the StarBright and how to toggle the state of the backlight. To turn the StarBright on:  Briefly press the On/Off switch (located under the Navigation keys, at the bottom ‎...

  • Page 20: Charger Input

    ‎ Figure 3 -7 StarBright Rear Panel View Note: The charger circuit of the StarBright is designed to allow the charger to be plugged in for an extended period without causing damage to the battery. ‎ The approximate time between charges is given in...

  • Page 21: Rs232 And Usb Outputs

    10 times per second with the latest pulse energy. 3.3.8 RS232 and USB Outputs The StarBright is equipped for either RS232 or USB communications with PC. The Unit is supplied with a standard cable for USB communications and a custom cable for RS232 (see Figure ‎...

  • Page 22: Instrument Settings

    Using the StarBright Display Unit 3.4.1 Instrument Settings When no sensor is connected, the StarBright Instrument Settings screen is displayed. This gives you the opportunity to change instrument settings including the RS232 baud rate, maximum analog output, language, line frequency,...
  • Page 23 Using the StarBright Display Unit ‎ Table 3 -2 StarBright Instrument Settings Parameter Description RS232 Baud Set the baud rate for RS232 PC communication. Options include:  115200  57600  38400  19200 Max An. Output Select the voltage of analog output for full scale measurement.

  • Page 24: Field Upgrade - Updating The Starbright Firmware

    3 -9 StarBright Field Upgrade Wizard 3.4.3 Clock Settings The StarBright is equipped with a real time clock which shows the date and time. This clock also allows the StarBright to query the sensor attached and notify you if the sensor is due for calibration.

  • Page 25: Zero Adjustments

    To zero the instrument: 1. Disconnect the sensor, turn the instrument off and then back on again, so the StarBright can identify that no sensor is connected. An "Initializing" message will be displayed. 2. Let the StarBright run for at least 30 seconds before performing zero adjustment. Make sure the sensor is in a quiet environment (without electrical noise) and not subject to pulsed radiation.

  • Page 26: Line Frequency

    2. Set to English, Japanese, Russian, or Chinese. 3. Press the Enter key to save the new setting. Note: If you mistakenly save the Japanese (or any foreign) language as the StarBright startup language, you can revert to English. To revert to English (from a foreign language): 1.

  • Page 27: Measurement Screens (Graph Types)

    Using the StarBright Display Unit 3.4.7 Measurement Screens (Graph Types) The StarBright measurement screens are available in a variety of graphical displays, as described in ‎ Table 3 -3 below (click the links to view more details): ‎ Table 3 -3 StarBright Measurement Screens (Graph Types)
  • Page 28 Using the StarBright Display Unit Graph Type Description Sample Figure Pass/Fail Test for measurements outside the user-defined range of acceptable readings. Configurable upper and lower limits. Useful for final inspection testing, other aspects of Production Q/A, or field inspection of equipment.

  • Page 29: Color Scheme

    Choose one of the monochrome schemes for use with protective goggles that filter out visible wavelengths. Screen captures of the StarBright in this manual are shown in the various color schemes. For example, the following sensor displays: ‎...
  • Page 30 Monochrome schemes are for use with lasers that demand protective glasses that filter out colors in the visible part of the wavelength spectrum. These color schemes apply to all of the screens. All color-enhanced features of the StarBright will not be functional in any of the monochrome screens.

  • Page 31: Starbright Screen Layout

    Using the StarBright Display Unit StarBright Screen Layout The StarBright screen display is carefully designed to provide easy reading of the laser measurement, quick access to configuration parameters, as well as the ability to set up for more advanced work.

  • Page 32: Points To Consider

    StarBright will help you implement the answers to these questions. The following chapters describe the measurement functionality of the various sensor types, the graphical displays of the StarBright meter, as well as the data logging and math processing capabilities that make the StarBright meter the complete answer to your measurement needs.

  • Page 33: Thermopile Sensors

    On power up, the StarBright meter checks its own memory as well as the sensor’s to decide on the measurement configuration. For example, if in the last session, the sensor was used to measure...

  • Page 34: Operation Of Starbright With Thermopile Absorber Sensors

    Operation of StarBright with Thermopile Absorber Sensors To use StarBright with Thermopile sensors: 1. Connect the Thermopile sensor to the StarBright meter: Insert the 15 pin D type connector of the measuring sensor cable into the socket marked Sensor Input on the rear panel of the StarBright meter.

  • Page 35: Measuring Laser Energy With Thermopile Sensors

    1, 10, 100, and so on. When the reading falls below 9% of full scale, the range changes to one range lower. This change only occurs after a few seconds delay. This provides overlap (hysteresis) to keep the StarBright from flipping back and forth when reading close to the end of the scale.
  • Page 36 Low. If the StarBright is used in a noisy environment or where there is a high level of background thermal radiation, the instrument may trigger spuriously on the noise or background radiation.

  • Page 37: Measuring Pulses Of Very Low Energy

    Average Energy per Pulse = Average Power / Pulse Repetition Rate For rapidly repeating pulses, you can use one of the Ophir Pyroelectric sensors, as long as the pulse energies do not exceed the ratings of the Pyroelectric absorbers. The Pyroelectric sensors are compatible with StarBright and just have to be plugged in to be used.

  • Page 38: Beamtrack Sensors

    BeamTrack Sensors For a list of the available BeamTrack Sensor models that can be used with StarBright, see Sensor Specifications. Some of Ophir’s Thermopile sensors are equipped with circuitry enables them to measure the laser’s position as well as the spot size in addition to standard power and energy measurement.

  • Page 39: Setting Measurement Parameters

    1, 10, 100, and so on. When the reading falls below 9% of full scale, the range changes to one range lower. This change only occurs after a few seconds delay. This provides overlap (hysteresis) to keep the StarBright from flipping back and forth when reading close to the end of the scale.

  • Page 40: Tracking Laser Beam Position And Size

    2. Go to Graph Type and select Stability. Return to the main display screen. 3. Press 1 sec to change the time interval (to 3, 10, 30 seconds or 1 minute). ‎ Figure 6 -3 Stability Display with BeamTrack Sensor StarBright User Manual...

  • Page 41: Photodiode Sensors

    The StarBright display unit amplifies this signal and indicates the power level received by the sensor. Due to the superior circuitry of the StarBright, the noise level is very low, and the PD300/3A-IS series sensors with the StarBright display have a large dynamic range from nanowatts to hundreds of milliwatts.
  • Page 42 Use the procedure below to set the PD300 to your laser wavelengths. Topics include:  Operation of StarBright with Photodiode Sensors  Measuring Laser Power with Photodiode Sensors  Averaging and Measuring Very Low Power Measurements StarBright User Manual...

  • Page 43: Operation Of Starbright With Photodiode Sensors

    Operation of StarBright with Photodiode Sensors To use StarBright with Photodiode sensors: 1. Connect the Photodiode sensor to the StarBright meter: Insert the 15 pin D type connector of the measuring sensor cable into the socket marked Sensor Input on the rear panel of the StarBright meter.
  • Page 44 (The reading is displayed in watts.) This change only occurs after a few seconds delay. This provides overlap (hysteresis) to keep the StarBright from flipping back and forth when reading close to the end of the scale.

  • Page 45: Averaging And Measuring Very Low Power Measurements

    7 -2 Photodiode Power Line Graph Averaging and Measuring Very Low Power Measurements If the laser power is fluctuating, the StarBright can display the average power readings with averaging periods varying from 1s to 1 hour. When measuring very low powers, such as picowatt measurements using the PD300-IRG or PD300-UV, there will be a rather large zero offset coming from the detector as well as a considerable noise fluctuation.

  • Page 46: Pyroelectric And Photodiode Energy Sensors

    They can measure low energies as well as high. They can also measure at higher repetition rates than was possible before. The StarBright meter amplifies this signal and indicates the energy received by the sensor as well as the frequency at which the laser is pulsing. Using the energy and frequency information, StarBright is also able to display average power.

  • Page 47: Measuring Pulses Of High Energy Density

    Operation of StarBright with Pyroelectric and Photodiode Energy Sensors On power up, the StarBright meter checks its own memory as well as the sensor’s to decide on the measurement configuration. For example, if in the last session, the sensor was used to measure energy in the Bargraph screen in the 200uJ range with a 1064 laser with no averaging, this will be the setup used the next time the system is powered up.

  • Page 48: Zeroing The Energy Sensor Against The Starbright Meter

    After this is done, the sensor is “conditioned” to work with the particular StarBright the zeroing was done against. It is not necessary to do this procedure again unless the StarBright is used with a different sensor. If the procedure is not done, errors of 2% or so can occur.
  • Page 49 If the sensor does not read the pulses at all on the lowest range, try to lower the threshold to minimum. 6. Set Average to the period you wish to average power over, or set to NONE to disable. Figure ‎ 8 -3 Pyroelectric Energy Needle with Average Selection Open StarBright User Manual...

  • Page 50: Energy, Average Power, Or Exposure Measurement

    Set the threshold to a high enough value that false triggering does not occur. Ophir also offers a shock absorbing mounting post (P/N 7Z08268) that helps reduce vibration on the sensor.

  • Page 51: Measuring Average Power

    Average Power = Average Energy X Frequency where the energy and frequency of the pulses have been measured by StarBright. Note: StarBright use when measuring power is the same as when measuring energy and has been described in full in section Operation of StarBright with Pyroelectric and Photodiode Energy Sensors.

  • Page 52: Measuring Total Energy Exposure

    4. To stop exposure measurement before the chosen period, press Stop. 5. To reset the reading to zero before another reading, press Reset. 6. To return to the main energy measurement screen, set Measuring to Energy. ‎ Figure 8 -6 Pyroelectric Exposure Measurement StarBright User Manual...

  • Page 53: Graphical Displays

    Graphical Displays The StarBright has a robust variety of customizable graphical displays for measuring, presenting, and reading data. The StarBright can operate in the standard power/energy measurement screen or needle type display or can display the information in specialized forms: an attenuation screen, a tune/exposure screen, a power/energy density screen, a screen normalized to some value or a screen with limits.

  • Page 54: Display Settings

    Display settings screen, where you can set the display of the main StarBright measurement screen to present the data in a variety of graphical formats when connected to a particular sensor. You can access this screen by pressing Menu > Display.

  • Page 55: Bargraph

    4. To subtract the background and set the current reading to zero, press the Offset key. Press Offset again to cancel. For more details, see Offset. See also Measuring Loss Using the dB Offset Function. 9.2.1 Measuring Modes The Measuring modes that Bargraphs can be used with include:  Power  Energy StarBright User Manual...

  • Page 56: Zoom

    In this case, the true power is 20.5 - 0.1 = 20.4 mW. To subtract the background, press Offset while the laser is blocked. The StarBright will now read zero (0.0), and the 0.1 mW background will be subtracted from all subsequent readings. The laser power reading will thus be 20.4 mW.

  • Page 57: Measuring Loss Using The Db Offset Function

    Offset twice. The first press will cancel the old value, and the second will activate a new value. If you suspect that StarBright has a permanent zero offset, the instrument’s internal zero should be reset. See Zero Adjustments.

  • Page 58: Bargraph Style

    Graphical Displays 9.2.5 Bargraph Style In addition to the large digital readout, on the main power screen of the StarBright there is a bargraph that graphically displays what percentage the present reading is of full scale. This bargraph can be given enhanced functionality when in full color mode (for example, when the Color Scheme is set to Color 1 or Color 2).
  • Page 59 You can set the Bargraph Style to Standard for a simple bargraph in full scale, using the procedure above. Select Standard instead of Changing. (The Levels options are disabled.) ‎ Figure 9 -13 Bargraph Style Set to Standard StarBright User Manual...

  • Page 60: Analog Needle

    Parameter settings, the sensor’s name and serial number, and battery status indicator at the top of the screen.  Needle graph displayed prominently in the middle of the screen.  Large numeric display.  Soft key legends at the bottom of the screen (for example, Menu, Zoom, Offset, Persist). StarBright User Manual...

  • Page 61: Measuring Modes

    Press the Persist key to continue to display previous readings as well as to show the minimum and maximum measurements. ‎ Figure 9 -16 Pyroelectric Energy Needle with Persistence StarBright User Manual...

  • Page 62: Line Graph

    4. Set the horizontal sweep (X-Axis) time as necessary. 5. Press Reset to clear the Min/Max tracking and to restart the graph. 9.4.1 Measuring Modes The Measuring modes that Line graphs can be used with include:  Power  Energy StarBright User Manual...

  • Page 63: Percentage Range (Y-Axis Scale)

    Adjusting the X-axis (horizontal sweep time) allows you to select how much data is displayed on the screen before it wraps around to the beginning. Press the time key to set the Y-Axis Scale to the desired setting. ‎ Figure 9 -19 Time Settings on Line Graph StarBright User Manual...

  • Page 64: Reset

     Max, Min, Average, Standard Deviation, and Over values on upper left and right above graph.  Large numeric display.  Soft key legends at the bottom of the screen (for example, Menu, Offset, Reset). StarBright User Manual...

  • Page 65: Measuring Modes

    Upper limit, Lower Limit on upper left above the graph.  Out-of-range warning (OVER/UNDER) on upper right above the graph.  Large numeric display.  Soft key legends at the bottom of the screen (for example, Menu, Upper, Lower). StarBright User Manual...

  • Page 66: Measuring Modes

    Color Scheme has been set to one of the full color options, then this will be displayed in RED, ‎ along with the reading itself (as shown in Figure 9 -25 below). ‎ Figure 9 -25 Pyroelectric Pass/Fail - Modify Upper Limit StarBright User Manual...

  • Page 67: Exposure (For Pyroelectric Sensors)

    4. Press Manual (the rightmost soft key) and use the Navigation keys to select the options to end the exposure measurement (see Manual, Timeout, Pulses). 5. Press Reset to stop the exposure measurement and reset the total, pulse counter, and elapsed time to 0. StarBright User Manual...

  • Page 68: Measuring Modes

    (as shown on the key legend). You can select: 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, or 5000. Will also stop by the user pressing the Stop key. ‎ Figure 9 -29 Pulse Options StarBright User Manual...

  • Page 69: Position (For Beamtrack Sensors)

    This section describes the StarBright’s position and size measurement functionality. This is available in the Track screen, which shows the position of the laser beam as measured by the sensor.

  • Page 70: Measuring Modes

    Time elapsed (on upper left) is the time that has passed since the start of this stability measurement session.  Points (on the upper left) are the number of position readings that were taken in this measurement session.  Numeric display of (XY) position along the left side of the screen. StarBright User Manual...

  • Page 71: Measuring Modes

    4. Press Reset to reset the time scale, the graph, and the statistics displayed. 9.9.1 Measuring Modes The Measuring mode that Stability displays can be used with is:  Track 9.10 Other Display Settings Additional display settings include:  Show/Hide Settings  Color Scheme StarBright User Manual...

  • Page 72: Show/Hide Settings

    5. Press the Enter key to save the settings. 9.10.2 Color Scheme You can select the color scheme of the StarBright display. This is especially useful for operation when wearing protective goggles that filter out visible wavelengths. You can configure the StarBright for full color or monochrome functionality. Choose full color to make use of special color enhancements.
  • Page 73 Graphical Displays Screen captures of the StarBright in this manual are shown in the various color schemes. For example, the following sensor displays: ‎ ‎ ‎ Figure 9 -35 Thermopile Sensor Figure 9 -36 Photodiode Sensor Figure 9 -37 Pyroelectric Sensor...
  • Page 74 Monochrome schemes are for use with lasers that demand protective glasses that filter out colors in the visible part of the wavelength spectrum. These color schemes apply to all of the screens. All color-enhanced features of the StarBright will not be functional in any of the monochrome screens.

  • Page 75: Math Functions

    Function and Pass/Fail settings (displayed after the Right Arrow has been pressed). Figure ‎ 1 0-1 Main Measurement Screen Functions Figure ‎ 1 0-2 Function Settings Note: For BeamTrack sensors in Track Mode, function settings will apply to the power measurement only. StarBright User Manual...

  • Page 76: Functions Screen

    Also, many of them can be combined. For example, to see the power density of a laser beam after it has gone through a beam splitter. (In StarBright, these factors can be kept and applied in the graphical displays as well.) ‎...

  • Page 77: Average

    3. Set the value to subtract from all subsequent measurements. 4. Press Apply to set the present value as Fixed Offset or press the Enter key to define a different value. (Click Clear to zero the value.) ‎ Figure 1 0-5 Modifying Fixed Offset StarBright User Manual...

  • Page 78: Scale Factor

    3. Set to value by which to multiply all subsequent measurements. Press the Enter key. The Scale Factor can be between 0.00001 and 9999 only positive. (Click Clear to zero the value.) ‎ Figure 1 0-6 Modifying Scale Factor StarBright User Manual...

  • Page 79: Normalize

    When Normalize is applied, measurements are displayed dimensionless; that is to say, without the W or J symbols. They are shown as the result of the present reading/reference value. ‎ Figure 1 0-7 Modifying Reference StarBright User Manual...

  • Page 80: Density

    4. After the shape (Rectangle or Circle), select the size (Height and Width, or Diameter). Size parameters can range from 0.1mm to 100.0mm. The measurements will be shown as cm² on the graphical display on the main measurement screen. ‎ Figure 1 0-9 Measurement of Power Density in nW/cm StarBright User Manual...

  • Page 81: Function Limitations

    For energy sensors in Exposure mode, Average, Normalize, and Density are disabled.  If Normalize is active, then Density is disabled. If Density is active, then Normalize is disabled.  If the present Power Range is dBm, then Normalize is disabled. StarBright User Manual...

  • Page 82: Logging Data To A File For Upload To Pc

    “External storage device not available.” If a Disk on Key is found, StarBright will look for a directory called “Log Files” in the root directory of the Disk on Key and if not found, StarBright will create it. StarBright will then set “Log Files”...

  • Page 83: Setting Logging Parameters For The Various Stop Modes

    1 1-3 Stop Mode Options To set the logging parameters for the various Stop modes: 1. In the Log Setup screen, go to Stop Mode and select an option (click the links for more details):  Manual: to manually stop logging. StarBright User Manual...

  • Page 84: Manual Mode

    Sample Rate: Enables you to control the number of readings that will be added to the log. Options include:  Every Reading  1 of 3 Readings  1 of 10 Readings  1 of 30 Readings  1 of 100 Readings  1 of 300 Readings  1 of 1000 Readings StarBright User Manual...

  • Page 85: After Timeout

    To set the Stop Mode to After Timeout: 1. In the Log Setup screen, set the Stop Mode to After Timeout. The Log Setup screen displays the following parameters: Figure ‎ 1 1-6 After Timeout - Stop Mode StarBright User Manual...
  • Page 86 Options include:  Sample: Logs only the last reading that was measured.  Average: Stores the average of all of readings that have been measured since the previous data has been added to the log. StarBright User Manual...

  • Page 87: After Measurements

    Sample Rate. Enables you to control the number of readings that will be added to the log. Options include:  Every Reading  1 of 3 Readings  1 of 10 Readings  1 of 30 Readings  1 of 100 Readings  1 of 300 Readings  1 of 1000 Readings StarBright User Manual...

  • Page 88: Start Logging

    3. When the log is completed, the display will stop updating and a Log Summary appears. The following will be displayed in a message box in the display area:  Log file name  Total readings  Number of overrange  Maximum  Minimum StarBright User Manual...

  • Page 89: Displaying Logged Data

    1 1-12 Log Summary Note: StarBright does not provide the user with the ability to add notes to a log file. 4. Press any key to return to the active logging screen. The Start and Exit keys are displayed. The display will be inactive and will be as it was when the log completed.
  • Page 90 2. Use the right and left arrows to scroll through the columns of file names. Use the up and down arrows to scroll through the files of the present column. When reaching the bottom of the column, scrolling down will return to the top of the column. StarBright User Manual...
  • Page 91 This means that the average in the statistics in the log file may be three averages calculated on top of each other, moving average then periodic average then full average. Make sure that what you configure is sensible. StarBright User Manual...

  • Page 92: Viewing The Log File On Your Computer

    Logging Data to a File for Upload to PC 11.5 Viewing the Log File on Your Computer In addition to reviewing the logged data on StarBright, you can also upload the data for review at your workstation. To view the log file on your computer: 1.

  • Page 93: Special Sensors

    Special Sensors In addition to the Thermopile, Photodiode, and Pyroelectric sensors described in the previous sections, Ophir offers sensors that are based on similar technologies that are geared towards other measurement applications. Topics include:  BC20  PD300-CIE  PD300-BB ...

  • Page 94: Pd300-Cie

    A diffuser is placed over its aperture, thereby eliminating the sensitivity of the Photodiode to the incident angle of the light. This enables the sensor to be used to measure irradiance when light is incident on the sensor from different angles. StarBright User Manual...

  • Page 95: Irradiance Measurement

    Special Sensors Differences between PD300RM and Standard PD300 Sensors Except for the following differences, use of the PD300RM with StarBright is the same as power measurement with a standard PD300:  Measurement Mode: With Photodiode sensors, the only measurement mode available is Power.

  • Page 96: Dosage Measurement

    Dosage is the integral of irradiance over time and is displayed as joules per square meter (J/cm²). This measurement mode is specific to the PD300RM. In dosage mode, StarBright measures 500 times per second, updating the dosage displayed on the screen every ½ second.

  • Page 97: Circuit Description

    13.1.2 Fast Analog Input In addition to the above basic analog circuit, the StarBright contains a second fast analog input. This supports certain Ophir sensors that read energy pulses at higher rates than can be supported by the basic analog circuit, but provides less overall accuracy than the above circuit. The fast analog input consists of an EMI filtered voltage input that is passed to a first stage of mild voltage attenuation.

  • Page 98: Emi Protection

    Circuit Description 13.2.2 EMI Protection The digital processor circuit and the whole StarBright instrument are protected by EMI protection component on all signals that pass in and out of the box. In addition, EMI protection is added internally to prevent disturbances to the normal functioning of the instrument. The instrument meets the requirements of the European Community with respect to electromagnetic compatibility and has the “CE”...

  • Page 99: Calibration, Maintenance, And Troubleshooting

    Note: All calibration factors are dependent on the currently active set of configuration parameters. In addition to NIST traceable factory calibration, Ophir sensors can be field calibrated by the user. Note: Modifying calibration factors will affect the sensor’s performance and should be performed by qualified personnel only.

  • Page 100: Calibration Of Thermopile Sensors

    These discs also have excellent absorption for 10.6 µm and other wavelengths. They can therefore be used for other types of lasers as well. The ‎ absorption of the various Ophir absorbers as a function of wavelength is shown in Figure 1 4-1 below.

  • Page 101: Linearity And Accuracy Of Ophir Thermopile Sensors

    The linearity of most Ophir Thermopile detectors is specified to be 1% over the specified power range of each particular instrument and is tested by Ophir from time to time. The linearity is generally tested against another sensor that has been NIST tested for linearity. For those models...

  • Page 102: Updating Thermopile Sensor Calibration Factors

    1 4-2 Absorption vs. Wavelength of Various Pyroelectric Sensor Absorbers Method of Calibration The absorption of the various Ophir Thermopile absorbers can vary from disc to disc. Therefore, all Ophir absorbers are individually calibrated against NIST traceable standards. Total Accuracy of Calibration A detailed discussion of Ophir calibration accuracy is available on the Ophir website at http://www.ophiropt.com/laser-measurement-instruments/laser-power-energy-...
  • Page 103 When this is selected, the main screen will display Sensitivity and Calibration Factor values on the left. Figure ‎ 1 4-5 Calibrating per Sensitivity Figure ‎ 1 4-6 Modifying Overall Figure ‎ 1 4-7 Updated Sensitivity Sensitivity Calibration Factor Calibration Factor in Main Screen StarBright User Manual...
  • Page 104 (erroneous power readings above 100% full scale). Affects power and energy readings. Thermopile sensors are slow in their response to a laser hitting them. StarBright contains software that algorithmically “speeds up” the response. Response tweaking is a feature that Ophir provides for users to tailor this to their application.
  • Page 105 Response tweaking works by the user seeing how long it takes to rise from 0 to the expected power and if there is overshoot or undershoot. The screen displays Scaling in progress. ‎ Figure 1 4-15 Scaling Begins StarBright User Manual...
  • Page 106 After the scaling is completed, the screen displays “Block laser until power is close to O”. ‎ Figure 1 4-16 Scaling Completed 3. Press Next. ‎ Figure 1 4-17 Response Calibration Factor 4. Adjust the Response Factor and press Next. ‎ Figure 1 4-18 Modifying the Response Calibration Factor StarBright User Manual...
  • Page 107 90%. 100% is drawn at about 75% of the full height of the graph to allow the user to see the overshoot, if there is any. 7. Press Finish to save the Response factor. 8. Press Back to change and test again. (Repeat steps 5-7 above.) StarBright User Manual...

  • Page 108: Calibration Of Photodiode Sensors

    These filters also have a transmission that depends on wavelength. Therefore, when the PD300 is being used with StarBright, the StarBright has a built in calibration adjustment for wavelength which is described in the next paragraph.

  • Page 109: Updating Photodiode Sensor Calibration Factors

    Figure 1 4-23 Information Screen for Photodiode Sensors 3. Press Continue to activate calibration. The main Measurement screen appears, displaying the Calibration Factor value (on the left). ‎ Figure 1 4-24 Calibration Activated on Main Measurement Screen StarBright User Manual...

  • Page 110: Calibration Of Pyroelectric Sensors

    14.4 Calibration of Pyroelectric Sensors 14.4.1 Absorber Types Used in Ophir Pyroelectric Measuring Sensors The main absorber surface types used in Ophir Pyroelectric measuring sensors include:  Metallic Type: The type with no suffix in the name have a partially reflective multilayer metallic coating which absorbs approximately 50% and whose absorption graph is shown in ‎...

  • Page 111: Calibration

    1 4-27 Absorption of Ophir Pyroelectric Absorbers 14.4.2 Calibration The sensitivity of the various Ophir Pyroelectric sensors can vary from one to another as well as with wavelengths. Therefore, Ophir Pyroelectric detectors are individually calibrated against NIST traceable standards. In addition, there is a wavelength sensitivity correction curve in the meter.

  • Page 112: Updating Pyroelectric Sensor Calibration Factors

    The exact accuracy of each type of sensor is specified in the latest edition of the Ophir catalog. For more details on calibration accuracy, see the Ophir website at http://www.ophiropt.com/laser-measurement-instruments/laser-power-energy- meters/tutorial/calibration-procedure. 14.4.4 Updating Pyroelectric Sensor Calibration Factors Calibration of Pyroelectric sensors is only done when they are measuring energy.
  • Page 113 4. Press Modify. The screen displays the Original (current) reading and factor (on the left side of the screen), and Updated factor and its effect on the reading (on the right). The Updated box is highlighted, indicating it is modifiable. ‎ Figure 1 4-31 Modifying Calibration for Pyroelectric Sensors StarBright User Manual...

  • Page 114: Error Messages

    Low Battery: When the battery is almost discharged, the Battery icon will have only 1 segment left. This means the battery is ¾ empty. At this stage, the StarBright should be connected to the charger. It will operate normally and charge while connected to the charger.

  • Page 115: Thermopile Sensors, Energy Measurements

    Sensor is mounted to stand using insulated plastic rod provided with instrument, and not metal rod. Instrument shows frequency which is 1. Try keeping cable away from bench. too high 2. Move sensor/display further away from EMI. StarBright User Manual...

  • Page 116: Maintenance

    Sensor Specifications. 3. Using a multimeter set to current, unplug the sensor from the StarBright and check that this current appears between pin 1 and 9 of the D type plug. 14.7.2 Battery Replacement If the StarBright battery is defective and does not hold a charge, a replacement can be ordered from your agent (Ophir part number 7E14008).

  • Page 117: Starbright Specifications

    114W x 41D x 212H Mass 470g Display 320x240 pixel TFT LCD; Active area 70x52mm approx. Display digit height 15mm LCD lighting LED’s. Operates from charger or battery. Lighting level can be adjusted between 3 levels using on/off button. StarBright User Manual...
  • Page 118 Thermopile/Photodiode 17, Pyroelectric 15 With high backlight: Thermopile/Photodiode 15, Pyroelectric 13 Note: Battery charge will be depleted faster if a USB Flash Drive is left plugged in the StarBright meter Data Logging Log period 1 sec to 1000 hours Max points stored onboard...

  • Page 119: Sensor Specifications

    20KW/cm² 50A-PF-DIF-18 0.5KW/cm² PF-DIF 30(150)A-BB-18 30(150)W 12KW/cm² 30(150)A-HE-17 30(150)W 0.5KW/cm² 50(150)A-BB-26 50(150)W 12KW/cm² L50(150)A-BB-35 50(150)W 12KW/cm² L50(150)A-LP1-35 50(150)W 38KW/cm² L40(150)A 35(150)W 12KW/cm² L40(150)A-LP1 35(150)W 38KW/cm² L40(150)A-EX 35(150)W 2KW/cm² L50(300)A 50(300)W 9.5KW/cm² L50(300)A-PF-65 50(300)W 3KW/cm² F150A-BB-26 150W 12KW/cm² StarBright User Manual...
  • Page 120 1.5KW/cm² BD5000W-BB-50 5000W 3KW/cm² BD10K-W 10,000W 10KW/cm² 3A-QUAD 1KW/cm² 3A-P-QUAD 50W/cm² 10A-PPS 28KW/cm² 50(150)A-BB-26-QUAD 50(150)W 12KW/cm² F150A-BB-26-PPS 150W 12KW/cm² FL250A-BB-50-PPS 250W 10KW/cm² 1000W-BB-34-QUAD 1000W 6KW/cm² PD10-C 50mW 50W/cm² PE9-C/ PE9-ES-C 30W/cm² PE/PE-ES PE10BF-C 50W/cm² PE-BF PE25-C 20W/cm² StarBright User Manual...
  • Page 121 LP1 - Broadband surface absorber for highest power density BF - Very high damage threshold, long pulses FS - Fused silica window close to detector for divergent beams Note: For more detailed and exact specifications, see the latest Ophir Laser Measurement Instruments Catalog. StarBright User Manual...
  • Page 122 1 5-3 Maximum Energy Densities for Various Absorbers (Single Pulse) Absorber Max Energy Density J/cm² Type Pulse Length 10ns 1µs 300µs 0.09 PE Metallic PE, BB PE-DIF PE BB-DIF ‎ Figure 1 5-1 Pulsed Laser Damage Threshold for Thermopile Sensors StarBright User Manual...
  • Page 123 StarBright Specifications ‎ Figure 1 5-2 Pulsed Laser Damage Threshold for Pyroelectric Sensors StarBright User Manual Ophir P/N 1J06062 25 Nov 2015 Rev 1.18-1 For the latest version, please visit our website: www.ophiropt.com/photonics. StarBright User Manual...

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