KVANT SPECTRA User Manual
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KVANT SPECTRA User Manual

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SPECTRA
USER MANUAL

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Summary of Contents for KVANT SPECTRA

  • Page 1 SPECTRA USER MANUAL...

  • Page 2: Table Of Contents

    CONTENTS COMPOSITION OF THE TEACHING AID SPECIFICATION AND USE OF THE DEVICE Technical Specifications SOFTWARE INSTALLATION HOW THE SPECTROMETER WORKS CALIBRATION USER INTERFACE THE MAIN SCREEN SPECTRUM SETUP SPECTROMETER CONTROL GRAPH GRAPH SETTINGS SPECTROMETER CALIBRATION MEASURING EMISSION SPECTRUM REFERENCE SPECTRUM, DIFFERENCE REFERENCE SPECTRUM, RATIO EMISSION SPECTRUM –...

  • Page 3: Composition Of The Teaching Aid

    Spectra v5. SPECIFICATION AND USE OF THE DEVICE The Spectrometer SPECTRA is an easy-to-use USB spectrometer, which allows the recording and evaluation of spectral properties of sources, transparent and light-reflecting surfaces of various materials in the range of wavelengths 380 - 900 nm. The device is supplied with an optical fiber with SMA connectors and a collimator.

  • Page 4: Technical Specifications

    REQUIREMENTS). 1. Before installing the spectrometer, uninstall all previously installed versions of the application. 2. Download the installer from https://www.kvant.sk/apps/spektrometer/spectra.exe 3. Choose a location to store your application files, follow the on-screen instructions, and proceed with the application installation. 4. Connect the spectrometer to the USB port (if it is not already connected).
  • Page 5 Its position and width can be selected in the software (spectrometer control). The SPECTRA spectrometer from KVANT is intended for teaching and qualitative analysis of spectral properties of various types of substances and light sources.

  • Page 6: Calibration

    The correction - the alignment of the RGB envelope is adjusted by the optimal polynomial. The Spectrometer delivers a video image (1280 by 720 pixels) of the final spectrum. Each of the 1280 columns of the record is assigned a wavelength by calibration. Light intensity (in a.u. units (arbitrary unit)) for a given wavelength is calculated as the arithmetic mean of the values from the selected lines of the record.

  • Page 7: User Interface

    USER INTERFACE THE MAIN SCREEN The main screen consists of several sections: 1 Spectrum Setup, 2 Spectrometer Control, 3 Graph, 4 Graph Settings, 5 Spectrometer Calibration. Application user interface SPECTRUM SETUP On the left side of the application is a preview window where the current record from camera or folder is displayed.

  • Page 8: Spectrometer Control

    You can select a spectrum source in two ways: 1. Select a spectrum from a file – image recording format, the path to the source file is displayed in a white window with the name of the selected file. 2. Select a camera - current observation and graphical display of the output from the spectrometer camera. To launch the spectrometer, follow these steps: •...

  • Page 9: Graph

    When selecting the current recording from the spectrometer camera, it is possible to change the intensity with the Exposure control element. At low intensities, the sensitivity can be increased using the High sensitivity button. The graphic output immediately responds to changes in the values of the control elements of the panel. GRAPH Wavelenght [nm] GRAPH SETTINGS...
  • Page 10 Dependent variable, the y-axis, can be displayed in two optional modes. Automatic mode assigns the range of the variable a value derived from its lowest and highest value in the graph. Turning off automatic mode assigns a range corresponding to the lowest and highest value for the selected display method. For normal graphic outputs, these are values of pixel intensities of 0-255 units.
  • Page 11 The positions of the extremes, most often the peaks, of the spectral dependences have irreplaceable role when the character of the spectra is considered. In graphical terms, the possibility of highlighting them is accessible with the Show peaks switch. The conditions for their determination are again optional properties via the Peak distance, Peak threshold and Peak smoothing controls.

  • Page 12: Spectrometer Calibration

    START / PAUSE The current recording from the spectrometer camera runs in continuous mode with intervals determined by the exposure time of the camera. Synchronous with the change of the record, the graphic form of the selected part of the record also changes. Interruption of the continuous recording of the camera is enabled by the Pause option on the graph control panel.
  • Page 13 Additional calibration points can be entered by clicking Show more. Up to 15 calibration points can be recorded. Adding calibration points increases the accuracy of determining the wavelengths of spectral lines. The accuracy of the determination of the calibration curve can be checked by displaying it by selecting Calibration curve on the Spectrometer calibration panel.
  • Page 14 Correction As a source, it is necessary to choose a light bulb with an incandescent filament and choose the recording parameters from the camera so that the intensities in the graph are not saturated. It is ideal to set the exposure and gain of the camera so that the largest part of the graph is used.

  • Page 15: Measuring

    Wave lenght [nm] Mathematically adjusted, corrected R, G, B spectral response of the spectrometer camera The corrected and uncorrected spectral response of the spectrometer camera can be changed by proportional representation of the R, G, B components in the output signal. The preset values of the R, G, B components have a size of 1.

  • Page 16: Reference Spectrum, Difference

    REFERENCE SPECTRUM, DIFFERENCE Smoothed emission spectrum of the white LED after subtraction of the background reference spectrum For optimal spectrum recording, it is necessary to place the light source and the spectrometer in such a mutual position that no part of the spectrum is oversaturated. For this purpose, it is also advisable to change the exposure time of the spectrometer camera.

  • Page 17: Emission Spectrum - Calibration Sources

    Wavelenght [nm] Transmittance of the red filter after using the Ratio function EMISSION SPECTRUM – calibration sources Pixels [px] Combination of line spectrum sources Hg, Ar in energy saving lamp and Ne tube for calibrating the spectrometer...

  • Page 18: System Requirement

    Pixels [px] Using the positions of the spectral lines of Neon to increase the number of calibration points SYSTEM REQUIREMENT RECOMMENDED SYSTEM REQUIREMENTS SOFTWARE (OPERATING SYSTEM) • Operating system: Microsoft Windows 10 64bit • File system: NTFS • Windows Installer 3.1 (may be included in the installation package or part of the OS) •...

  • Page 19: Warning

    warranty period expires if there are defects caused by improper handling, natural wear and tear, improper operation, repairs or interference by persons not authorised to do so. WARNING The item is intended for use as a demonstration teaching aid only and serves no other purpose! Before using the goods, carefully read and follow all safety instructions, both on the instrument labels and in the enclosed manuals.

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