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FLIR
LEPTON® Engineering Datasheet
General Description
Lepton® is a complete long-wave infrared
(LWIR) camera module designed to interface
easily into native mobile-device interfaces and
other consumer electronics. It captures infrared
radiation input in its nominal response
wavelength band (from 8 to 14 microns) and
outputs a uniform thermal image with
1
radiometry
to provide temperature image with
measurements.
Lepton Features
•
Integral shutter configurations
•
Configurations with 25°, 50° and 57°
HFOV (f/1.1 silicon doublet)
•
LWIR sensor, wavelength 8 to 14 µm
•
Arrays with 80x60 and 160x120 active
pixels available
•
Thermal sensitivity <50 mK
•
Integrated digital thermal image
processing functions, including
automatic thermal environment
compensation, noise filters, non-
uniformity correction, and gain control
•
Radiometric accuracy
o High gain: ±5C @ 25°C
o Low gain ±10C @ 25°C
•
Radiometric Leptons
temperature measurement including
per pixel and frame radiometric output
(TLinear) and Spotmeter
•
Export compliant frame rate (< 9 Hz)
•
SPI video interface
•
Two-wire I2C serial control interface
1
Radiometric Leptons are 2.5 and 3.5.
The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available,
1
2
1
(35°C blackbody)
1
feature
and therefore, not subject to EAR. NSR (6/14/2018).
Information on this page is subject to change without notice.
Lepton Engineering Datasheet, Document Number: 500-0659-00-09 Rev: 203
•
Uses standard cell-phone-compatible
power supplies: 2.8 V to sensor, 1.2 V to
digital core, and flexible IO from 2.8 V
to 3.1 V
•
Fast time to image (< 1.2 sec)
•
Low operating power
o Nominally 160 mW
o 800mW typical during shutter
event (~1s)
o Low power mode 5 mW
•
RoHS compliant
•
32- pin socket interface to standard
Molex or similar side-contact connector
Applications
•
Mobile phones
•
Gesture recognition
•
Building automation
•
Thermal imaging
•
Night vision
2
All specifications subject to change without notice
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Related Manuals for FLIR Lepton 1.6
Summary of Contents for FLIR Lepton 1.6
- Page 1 FLIR LEPTON® Engineering Datasheet General Description Lepton® is a complete long-wave infrared (LWIR) camera module designed to interface easily into native mobile-device interfaces and other consumer electronics. It captures infrared radiation input in its nominal response wavelength band (from 8 to 14 microns) and...
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Page 2: Table Of Contents
FLIR LEPTON® Engineering Datasheet Contents INTRODUCTION ................................6 ................................6 EVISION ISTORY ..................................6 ONTACT ..................................6 EFERENCES ................................8 EVICE VERVIEW ................................9 PECIFICATIONS ..............................11 YSTEM RCHITECTURE FUNCTIONAL DESCRIPTION ............................12 FPA I ..............................12 NTERFACE ODULE ..........................12... - Page 3 FLIR LEPTON® Engineering Datasheet 3.5.1 Radiometry Enabled - TLinear ..........................30 3.5.2 Radiometry Enabled – Flux linear ........................... 30 3.5.3 Radiometry Disabled .............................. 31 3.5.4 Radiometric Accuracy – Module ..........................32 3.5.5 Radiometric Accuracy – System Considerations ..................... 32 AGC M ..................................
- Page 4 FLIR LEPTON® Engineering Datasheet Table of Figures Figure 1. Lepton with shutter Camera (with and without socket) ................8 Figure 2 - Lepton Architecture ..........................11 Figure 3 - Lepton Detailed Block Diagram ........................ 12 Figure 4 - Lepton Video Pipeline Block Diagram ...................... 14 Figure 5 - State Diagram Showing Transitions among the Five Power States ............
- Page 5 FLIR LEPTON® Engineering Datasheet Figure 29 - Failure to Read Out an Available Frame ....................53 Figure 30 - Generic VoSPI Packet ..........................55 Figure 31 - Segment and Packet Relationship to the 160x120 video image ............55 Figure 32 - Packet Header Encoding and an Example ....................56 Figure 33 - Discard Packet ............................
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Page 6: Introduction
Clarified validity of scene dynamic range. Updated EAR statement. Clarified that THousing in telemetry is only supported for Lepton 2.5 and 3.5. 1.2 Contact Us email: SBA-CORES@FLIR.COM http://www.FLIR.com 1.3 References 110-0144-04 Lepton Software Interface Description Document (pdf) 80x60 Lepton VoSPI Developer Guide (pdf) 110-0144-50 Lepton VoSPI Developers Guide (pdf) (For 160x120) Lepton_Example_Schematic_CAD_r100.DSN (Cadence-Capture schematic CAD file) - Page 7 FLIR LEPTON® Engineering Datasheet 500-0659-41.pdf 500-0763-41.pdf 500-0726-41.pdf 500-0771-41.pdf The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. NSR (6/14/2018). Information on this page is subject to change without notice.
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Page 8: Device Overview
FLIR LEPTON® Engineering Datasheet 1.4 Device Overview Lepton is an infrared camera system that integrates a fixed-focus lens assembly, an 80x60 or 160x120 long-wave infrared (LWIR) microbolometer sensor array, and signal-processing electronics. Some configurations are also provided with an integral shutter assembly that is used to automatically optimize image uniformity on a periodic basis. -
Page 9: Key Specifications
Available configurations Part number Lepton 1.5: 500-0643-00 80 x 60 50° <8% -10 °C to +140 °C 17 μm Lepton 1.6: 500-0690-00 80 x 60 25° <3% -10 °C to +140 °C 17 μm Lepton 2.0: 500-0659-01 80 x 60 50°... - Page 10 Dimensions [mm] (w × l × h) Lepton 1.5 (without shutter): 8.47 × 9.67 × 5.62 Lepton 1.6 (without shutter): 8.47 × 9.69 × 8.84 Lepton 2.0 (with shutter): 10.50 x 11.70 x 6.37 Lepton 2.5, 3.0, 3.5 (with shutter): 11.50 x 12.70 x 6.835 Dimensions with socket Lepton 1.5 (without shutter): 10.78 ×...
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Page 11: System Architecture
FLIR LEPTON® Engineering Datasheet 1.6 System Architecture Figure 2 A simplified architectural diagram of the Lepton camera module is shown in Figure 2 - Lepton Architecture The lens assembly focuses infrared radiation from the scene onto an array of thermal detectors with 17m or 12m pitch. -
Page 12: Functional Description
FLIR LEPTON® Engineering Datasheet The serial stream from the FPA is received by a system on a chip (SoC) device, which provides signal processing and Functional Description, output formatting. This device is more fully defined in page 2 Functional Description... -
Page 13: Power Management Module
FLIR LEPTON® Engineering Datasheet 2.3 Power Management Module The Power Management module controls the power switches, under direction from the System Control Module. 2.4 Software-based Video Processing (SVP Core) Module The SVP Core module is an asymmetric multi-core digital signal processor (DSP) engine that provides the full video... -
Page 14: Gpio Interface Module (Gpio If)
FLIR LEPTON® Engineering Datasheet 2.10 GPIO Interface Module (GPIO IF) The General-Purpose Input / Output (GPIO) Interface module implements the GPIO pins, which can be runtime GPIO Modes configured (see page 2.11 Video Pipeline Figure 4 A block diagram of the video pipeline is shown in... -
Page 15: Agc
FLIR LEPTON® Engineering Datasheet correction (SBNUC) algorithm which relies on motion within the scene to isolate fixed pattern noise (FPN) from image content. 2.11.4 AGC The AGC algorithm for converting the full-resolution (14-bit) thermal image into a contrast-enhanced image AGC Modes suitable for display is a histogram-based non-linear mapping function. -
Page 16: Figure 5 - State Diagram Showing Transitions Among The Five Power States
FLIR LEPTON® Engineering Datasheet Figure 5 - State Diagram Showing Transitions among the Five Power States The power states are listed here: • Off: When no voltage is applied, Lepton is in the off state. In the off state, no camera functions are available. - Page 17 FLIR LEPTON® Engineering Datasheet • Shutdown: In the shutdown state, all voltage forms are applied, but power consumption is approximately 5 mW. In the shutdown state, no functions are available, but it is possible to transition to the on state via the start-up sequence defined in Figure 6.
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Page 18: Ffc States
FLIR LEPTON® Engineering Datasheet Figure 6 - Lepton Power Sequencing 3.2 FFC States Figure 7 Lepton is factory calibrated to produce an output image that is highly uniform, such as shown in (a), when viewing a uniform-temperature scene. However, drift effects over long periods of time degrade uniformity,... -
Page 19: Figure 7 - Examples Of Good Uniformity, Graininess, And Blotchiness
FLIR LEPTON® Engineering Datasheet as fixed-mount applications, scene-based NUC is less effective. In stationary applications and those which need highest quality or quickly available video, it is recommended to periodically perform a flat-field correction (FFC). FFC is a process whereby the NUC terms applied by the camera's signal processing engine are automatically recalibrated to produce the most optimal image quality. - Page 20 FLIR LEPTON® Engineering Datasheet In automatic FFC, the Lepton camera will automatically perform FFC under the following conditions: • At start-up • After a specified period of time (default of 3 minutes) has elapsed since the last FFC • If the camera temperature has changed by more than a specified value (default of 1.5 Celsius degrees) since the last FFC The time trigger and the temperature-change trigger described above are both adjustable parameters via the CCI;...
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Page 21: Figure 8 - Ffc States
FLIR LEPTON® Engineering Datasheet external FFC mode, the “FFC desired” flag is intended to indicate to the host to command an FFC at the next possible opportunity. Lepton automatically prohibits the shutter from operating when it detects the temperature to be outside the range -10°C to +80°C... -
Page 22: Gain States
FLIR LEPTON® Engineering Datasheet Figure 9 - Relative Spatial Noise after FFC vs. Number of Integrated Frames ((defaults is 8) 3.3 Gain States Lepton 2.5 and 3.5 can be configured to operate in a high-gain state (the only available state in other versions of Lepton) or a low-gain state. -
Page 23: Telemetry Modes
FLIR LEPTON® Engineering Datasheet In high gain mode, the camera operates in the high gain state only. In low gain mode, the camera operates in the low gain state only. In automatic gain mode, the camera software automatically selects between high and low gain states based on the scene conditions and the following user-selectable parameters: •... - Page 24 FLIR LEPTON® Engineering Datasheet Table 2 - Telemetry Data Content and Encoding Number Telemetry Word Word Name Notes of 16-bit start Words Telemetry Format = major (byte 1), minor rev (byte 0). Revision Time Counter 32-bit counter in units of msec elapsed since...
- Page 25 FLIR LEPTON® Engineering Datasheet Number Telemetry Word Word Name Notes of 16-bit start Words Time Counter at Updated every FFC. Units are msec last FFC Housing temp at Updated every FFC. Units are Kelvin x100. last FFC Lepton 2.5, 3.5...
- Page 26 FLIR LEPTON® Engineering Datasheet Number Telemetry Word Word Name Notes of 16-bit start Words Window Scaled by 8192 Reflection Window Temperature in Kelvin x 100 Temperature Window Temperature in Kelvin x 100 Reflected Temperature Reserved Reserved Gain Mode 0 = High, 1 = Low, 2 = Auto...
- Page 27 FLIR LEPTON® Engineering Datasheet Number Telemetry Word Word Name Notes of 16-bit start Words Temperature Temperature threshold in Kelvin used to Gain Mode determine when an Auto switch to High gain Threshold Low to mode (while in Low gain mode) should occur in...
- Page 28 FLIR LEPTON® Engineering Datasheet Number Telemetry Word Word Name Notes of 16-bit start Words Spotmeter ROI Spotmeter ROI starting row coordinate Start Row Spotmeter ROI Spotmeter ROI starting column coordinate Start Col Spotmeter ROI Spotmeter ROI ending row coordinate End Row...
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Page 29: Radiometry Modes
FLIR LEPTON® Engineering Datasheet Table 3 - Status Bit Encoding (Telemetry Row A, words 3 and 4) Number of Bit start Bit end Name Notes Bits Reserved FFC Desired 0 = FFC not desired 1 = FFC desired FFC State... -
Page 30: Radiometry Enabled - Tlinear
FLIR LEPTON® Engineering Datasheet • Radiometry enabled, TLinear enabled (default for Lepton 2.5 and 3.5) • Radiometry enabled, TLinear disabled • Radiometry disabled 3.5.1 Radiometry Enabled - TLinear The radiometry enabled mode affects the transfer function between incident flux (scene temperature) and pixel output. -
Page 31: Radiometry Disabled
FLIR LEPTON® Engineering Datasheet With radiometry enabled, Lepton performs internal adjustments to the signal level such that in principle the output is independent of the camera's own temperature. The resulting output for three different scene Figure 10. Figure 10 temperatures is illustrated hypothetically in... -
Page 32: Radiometric Accuracy - Module
FLIR LEPTON® Engineering Datasheet the camera's operating temperature range. The resulting output for three different scene temperatures is Figure 11 illustrated hypothetically in (note that the figure is for illustration purposes and not perfectly representative). Figure 11 - Hypothetical Illustration of Camera Output vs. Camera Temperature in Radiometry- disabled Mode 3.5.4 Radiometric Accuracy –... -
Page 33: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet The radiometric accuracy of the Lepton camera module depends primarily on the ambient and scene temperature. The size, distance, and emissivity of the target are also factors. Extreme humidity, high concentrations of certain gases such as CO , and nearby extremely hot or cold objects may also affect measurements and should be avoided during module tests. -
Page 34: Agc Modes
FLIR LEPTON® Engineering Datasheet Table 5 - Typical Radiometric Accuracy after Per Unit Calibration. T Ambient 0°C 30°C 60°C T Scene 10°C ±5°C ±5°C ±6°C 50°C ±5°C ±3°C ±3°C 100°C ±5°C ±4°C ±3°C A protective window will also affect intra-scene temperature range. Any environmental or system factors that reduce the flux received by the sensor will lower the lower limit, and raise the upper limit, of the range. -
Page 35: Figure 12 - Illustration Of A Histogram For A 3X3 Pixel Area
FLIR LEPTON® Engineering Datasheet Figure 12 - Illustration of a Histogram for a 3x3 Pixel Area Classic histogram equalization uses the cumulative histogram as a mapping function between 14-bit and 8-bit. The intent is to devote the most gray-shades to those portions of the input range occupied by the most pixels. For example, an image consisting of 60% sky devotes 60% of the available gray-shades to the sky, leaving only 40% for the remainder of the image. -
Page 36: Video Output Format Modes
FLIR LEPTON® Engineering Datasheet Figure 13 - Comparison of Linear AGC and Classic/Lepton Variant of Histogram Equalization A high value of clip limit high results in a mapping more like classic histogram equalization, whereas a low value results in mapping more like linear AGC. For clip limit low, the opposite is true: a high value results in a mapping more like linear AGC, whereas a low value results in a mapping more like classic histogram equalization. -
Page 37: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet • Raw14 (default) • RGB888 The first mode is appropriate for viewing 14-bit data (AGC disabled), 16-bit TLinear data (AGC disabled, TLinear enabled), or 8-bit data (AGC enabled) without colorization. The second mode is for viewing data after application of the colorization look-up table (LUT) to generate 24-bit RGB data. -
Page 38: Figure 14 - Built-In Color Palette
FLIR LEPTON® Engineering Datasheet Figure 14 - Built-in Color Palette The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. NSR (6/14/2018). Information on this page is subject to change without notice. -
Page 39: Gpio Modes
FLIR LEPTON® Engineering Datasheet Figure 15 - Comparison of an Identical Image with Grayscale and a False-color Palette 3.8 GPIO Modes There are two supported GPIO modes: • Disabled (default) • VSYNC enabled In disabled mode, no signals are provided as input or output on the GPIO pins. In VSYNC mode, a video sync Frame signal is provided as an output on GPIO3. -
Page 40: Interface Descriptions
The CCI address is 0x2A. The interface is described in detail in a separate document, the Lepton Software Interface Description Document (IDD), FLIR document #110-0144-04. Generally speaking, all commands issued through the CCI take the form of a “get” (reading data), a “set” (writing data), or a “run”... -
Page 41: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Power- Telemetry Parameter Section in this document Line Location 12,11 Default SYS Gain Mode Object (0,0,59,79) or Gain States, page B8-26 (0,0,119,169): GainROI (startRow, startCol, endRow, endCol) 25: P_hi_to_lo 90: P_lo_to_hi 115: C_hi_to_lo 85: C_lo_to_hi 388: T_hi_to_lo... -
Page 42: User Defaults Feature
FLIR LEPTON® Engineering Datasheet Power- Telemetry Parameter Section in this document Line Location Default RAD Spotmeter Value Radiometry Modes, page C50-53 RAD Flux Linear (8192, 29515, 8192, Radiometry Modes, page B19-26 Parameters 29515, 8192, 29515, 0, 29515) 4.1.1 User Defaults Feature The user defaults feature allows the user to write desired operational defaults, such as those described in the CCI above, to OTP such that an initialization sequence is not necessary at start-up. -
Page 43: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Power-On Parameter Section in this document Default SYS Scene Stats ROI (0,0,79,59) or (startCol, startRow, endCol, endRow) (0,0,159,119) SYS FFC Mode Auto States, page SYS FFC Period 180000 States, page SYS FFC Temp Delta States, page... -
Page 44: Ospi Channel
FLIR LEPTON® Engineering Datasheet Table 8 - Lepton Camera Module Pin Description for VPROG Signal Type Pin # Pin Name Signal Level Description VPROG Power 5.9V Supply for Programming to OTP (5.9V +/- 2%). Table 9 - Electrical Specifications for VPROG... -
Page 45: Vospi Physical Interface
FLIR LEPTON® Engineering Datasheet Figure 16 - VoSPI Flexible Clock Rate 4.2.1 VoSPI Physical Interface Figure 17 As illustrated in , VoSPI utilizes 3 of the 4 lines of a typical SPI channel: • SCK (Serial Clock) • /CS (Chip Select, active low), •... -
Page 46: Vospi Protocol - Lepton 1.5, 1.6, 2.0 And 2.5
FLIR LEPTON® Engineering Datasheet The MOSI (Master Out/Slave In) signal is not currently employed and should be grounded or set low. Implementations are restricted to a single master and single slave. The Lepton uses SPI Mode 3 (CPOL=1, CPHA=1); SCK is HIGH when idle. Data is set up by the Lepton on the falling edge of SCK and should be sampled by Figure 18 the host controller on the rising edge. -
Page 47: Figure 20 - Generic Vospi Packet
FLIR LEPTON® Engineering Datasheet • VoSPI Frame: A VoSPI frame is defined as a continuous sequence of VoSPI packets consisting of a full frame's worth of pixel data. • VoSPI Stream: A VoSPI stream is defined as a continuous sequence of VoSPI frames. -
Page 48: Figure 21 - Video Packet
FLIR LEPTON® Engineering Datasheet 4 bytes 160 or 240 bytes (depending upon bit resolution setting) For video packets, the header includes a 2-byte ID and a 2-byte CRC. The ID field is a 12-bit packet number as Figure 21 shown in (the leading 4 bits of the ID field are reserved and are not part of the packet number). -
Page 49: Figure 23 - Raw14 Mode: 1 Video Line Per 160-Byte Payload
FLIR LEPTON® Engineering Datasheet • For Raw14 mode (the default case), the payload is 160 bytes long. Excluding telemetry lines, each packet contains pixel data for all 80 pixels in a single video line. o With AGC disabled: ▪ With 14-bit raw data the first two bits of each pixel's two-byte word are set to 0. -
Page 50: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Telemetry As header As footer Disabled Mode Packet 0 Telemetry line A FPA Row 0 FPA Row 0 Packet 1 Telemetry line B FPA Row 1 FPA Row 1 Packet 2 Telemetry line C FPA Row 2... -
Page 51: Figure 25 - Frame Counter For Successive 80X60 Frames
FLIR LEPTON® Engineering Datasheet Figure 25 - Frame Counter for Successive 80x60 Frames NOTE: Blue frames are different than the previous frames, gray frames are identical to the previous blue frame. The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 52: Figure 26 - Valid Frame Timing (No Loss Of Synchronization)
FLIR LEPTON® Engineering Datasheet 4.2.2.3.1 Establishing/Re-Establishing Sync The basic process for establishing synchronization is listed below: • Deassert /CS and idle SCK for at least 5 frame periods (>185 msec). This step ensures a timeout of the VoSPI interface, which puts the Lepton in the proper state to establish (or re-establish) synchronization. -
Page 53: Figure 27 -Clock Too Slow - Failure To Read An Entire Frame Within The Frame Period
FLIR LEPTON® Engineering Datasheet Figure 27 -Clock Too Slow - Failure to Read an Entire Frame Within the Frame Period Figure 28 - Intra-Frame Delay Too Long - Failure to Read Out an Entire Frame Before the Next is Available Figure 29 - Failure to Read Out an Available Frame 4.2.2.3.3... -
Page 54: Vospi Protocol - Lepton 3.0 And 3.5
FLIR LEPTON® Engineering Datasheet 4.2.3 VoSPI Protocol – Lepton 3.0 and 3.5 The Lepton 3 VoSPI is built on a collection of object types as defined hierarchically below. ▪ VoSPI Packet: The Lepton 3 VoSPI protocol is based on a single standardized VoSPI packet, the minimum “transaction”... -
Page 55: Figure 30 - Generic Vospi Packet
FLIR LEPTON® Engineering Datasheet VoSPI synchronization is established. If the setting is changed while VoSPI is active, it is necessary to re- VoSPI Stream, page 50 synchronize (see Figure 30 - Generic VoSPI Packet Payload 4 bytes 160 or 240 bytes (depending upon bit resolution setting) For video packets, the header includes a 2-byte ID and a 2-byte CRC. -
Page 56: Figure 32 - Packet Header Encoding And An Example
FLIR LEPTON® Engineering Datasheet (b) Frame contents with telemetry enabled Figure 32 As shown in , the first bit of the ID field is always a zero. The next three bits are referred to as the TTT bits, and the following 12 are the packet number. Note that packet numbers restart at 0 on each new segment. -
Page 57: Figure 33 - Discard Packet
FLIR LEPTON® Engineering Datasheet (b) Example showing the packet header for line 20 of segment 3 The CRC portion of the packet header contains a 16-bit cyclic redundancy check (CRC), computed using the following polynomial: The CRC is calculated over the entire packet, including the ID and CRC fields. However, the four most-significant bits of the ID and all sixteen bits of the CRC are set to zero for calculation of the CRC. -
Page 58: Figure 34 - Raw14 Mode: 1 Video Line Per 160-Byte Payload
FLIR LEPTON® Engineering Datasheet Figure 34 - Raw14 Mode: 1 video line per 160-byte payload Byte 0 Byte 1 Byte 2 Byte 3 Byte 158 Byte 159 Line m Line m Line m Pixel 0 Pixel 1 Pixel 79 Figure 35 - RGB888 Mode: 1 video line per 240-byte payload... -
Page 59: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet (a) Telemetry as header (b) Telemetry as footer 4.2.3.3 VoSPI Stream A VoSPI stream is simply a continuous sequence of VoSPI segments following a synchronization event. Provided that synchronization is maintained, a VoSPI stream can continue indefinitely. The segment rate is approximately 106 Hz, which equates to a frame rate of ~ 26.5 Hz. -
Page 60: Figure 37 - Frame Counter For Successive Frames
FLIR LEPTON® Engineering Datasheet with US export restrictions. For each unique frame, two partial and invalid frames follow in the VoSPI stream. This Figure 37 pattern is illustrated in , with unique frames shown in blue and invalid frames shown in gray. The 32-bit... -
Page 61: Figure 38 - Valid Frame Timing (No Loss Of Synchronization)
FLIR LEPTON® Engineering Datasheet • Continue reading packets. When a new segment is available (should be less than 10 msec after asserting /CS and reading the first packet), the first video packet will be transmitted. The master and slave are now synchronized. -
Page 62: Vospi Protocol - Lepton 2 Vs. Lepton 3
FLIR LEPTON® Engineering Datasheet Figure 40 - Intraframe Delay Too Long - Failure to Read Out an Entire Frame Before the Next is Available Figure 41 - Failure to Read Out an Available Frame 4.2.3.3.3 Frame Synchronization The VoSPI protocol is designed such that embedded timing signals are not required. However, Lepton 3 does provide an optional frame-timing output pulse that can aid in optimizing host timing. -
Page 63: Thermal Camera Basics
FLIR LEPTON® Engineering Datasheet are unchanged. However, it is worth noting a single packet represented a single 80-pixel video line for Lepton whereas it represents half of a 160-pixel video line in Lepton 3. 3) The synchronization requirements are identical with one exception. To maintain synchronization, Lepton requires each video frame to be read out prior to the next available frame. -
Page 64: Figure 42 - Illustration Of Lepton Detector Time Constant
FLIR LEPTON® Engineering Datasheet Figure 42 - Illustration of Lepton Detector Time Constant In addition to integrating signal current, the ROIC also digitizes and multiplexes the signal from each detector into a serial stream. And the Lepton ROIC digitizes data from an on-chip temperature sensor as well as a thermistor attached to the camera housing. -
Page 65: Mounting Specifications
FLIR LEPTON® Engineering Datasheet 6 Mounting Specifications The Lepton camera mechanical interface is defined in the drawings in section References on page 6. An example with socket is shown in Figure Figure 43 - Lepton with Radiometry Camera Mounting Dimensions The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 66: Socket Information
FLIR LEPTON® Engineering Datasheet 6.1 Socket Information The Lepton module is compatible with two commercially-available sockets, Molex 105028-1001 and Molex Figure 44 105028-2031, illustrated in below. The former makes electrical contact on the upper surface of a printed circuit board, the latter to the lower surface (with a cutout in the board that allows the socket to fit into). -
Page 67: Figure 45 - Both Sockets Mounted On A Pcb
FLIR LEPTON® Engineering Datasheet Figure 45 - Both Sockets Mounted on a PCB The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. NSR (6/14/2018). -
Page 68: Mechanical Considerations
FLIR LEPTON® Engineering Datasheet 6.2 Mechanical Considerations Socket Information The socket described in on page is not intended to retain the Lepton assembly under Figure 46 high-shock conditions. It is recommended to incorporate front-side retention such as illustrated in . Note that a maximum, uniform, load of 1kgF can be applied to the shutter face without causing failures in shutter actuation. -
Page 69: Thermal Considerations
FLIR LEPTON® Engineering Datasheet 6.3 Thermal Considerations It is important to minimize any temperature gradient across the camera. The sensor should be mounted in such a fashion so as to isolate it from heat loads such as electronics, heaters, and non-symmetric external heating. The surrounding area must be able to support and withstand the dissipation of up to 160 mW of heat by the camera. -
Page 70: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet The nominal minimum on-axis modulation transfer function (MTF) at Nyquist/2 for the Lepton lens assembly is 63% for Lepton 1.5, 1.6, 2.0 and 2.5, and 51% for Lepton 3.0 and 3.5. The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 71: Spectral Response
FLIR LEPTON® Engineering Datasheet 8 Spectral Response Figure 47 For reference, depicts the typical spectral response of the Lepton camera. Figure 47 - Normalized Response as a Function of Signal Wavelength for Lepton 1.5, 2.0 and 2.5 The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 72: Figure 48 - Normalized Response As A Function Of Signal Wavelength For Lepton 3.0 And 3.5
FLIR LEPTON® Engineering Datasheet Figure 48 - Normalized Response as a Function of Signal Wavelength for Lepton 3.0 and 3.5 Normalized Response 100% 10.0 11.0 12.0 13.0 14.0 15.0 Wavelength (micron) The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 73: Electrical Specifications
FLIR LEPTON® Engineering Datasheet 9 Electrical Specifications 9.1 Lepton pin-out Figure 49 - Pinout Diagram (viewed from bottom of camera module) The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 74: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Table 14 - Lepton Camera Module Pin Descriptions Signal Pin # Pin Name Signal Level Description Type 1, 6, 8, Power Common Ground 9, 10, 15, 18, 20, 25, 27, 30 GPIO3/VSYNC IN/OUT Video output synchronization (see... -
Page 75: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Table 15 - Lepton Camera Module Pin Descriptions (cont.) Signal Pin # Pin Name Signal Level Description Type VDDIO Power Supply used for System IO 2.8 V — 3.1 V VPROG — — See section 2.8. -
Page 76: Dc And Logic Level Specifications
Maximum measured at 65 degrees C Maximum at -10 degrees C FLIR recommends utilizing two separate power supplies rather than a common supply for VDD and VDDIO due to noise considerations. The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. -
Page 77: Ac Electrical Characteristics
FLIR LEPTON® Engineering Datasheet 9.3 AC Electrical Characteristics Table 17 - AC Electrical Characteristics Parameter Units Master clock MASTER_CLK, F 24.975 MHz 25 MHz 25.025 MHz rate See note 1 See note 1, 2 Master clock MASTER_CLK, F clk duty... -
Page 78: Absolute Maximum Ratings
FLIR LEPTON® Engineering Datasheet 9.4 Absolute Maximum Ratings Table 18 Electrical stresses beyond those listed in may cause permanent damage to the device. These are stress rating only, and functional operation of the device at these or any other conditions beyond those indicated under... -
Page 79: Environmental Specifications
FLIR LEPTON® Engineering Datasheet 10 Environmental Specifications The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. NSR (6/14/2018). Information on this page is subject to change without notice. -
Page 80: Compliance With Environmental Directives
FLIR LEPTON® Engineering Datasheet Environmental stresses beyond those listed may cause permanent damage to the device. Exposure to absolute- maximum-rated conditions for extended periods of time may affect device reliability. Table 19 - Environmental Specifications Stress Maximum Rating Operating Temperature Range -10°C to 80°C... -
Page 81: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet The information contained herein does not contain technology as defined by the EAR, 15 CFR 772, is publicly available, and therefore, not subject to EAR. NSR (6/14/2018). Information on this page is subject to change without notice. -
Page 82: Abbreviations And Acronyms
FLIR LEPTON® Engineering Datasheet 11 Abbreviations and Acronyms Abbreviation Description Automatic Gain Control Anti-reflection Command and Control Interface Cyclic Redundancy Check Digital Signal Processor Electromagnetic Compatibility Flat Field Correction Field of View Focal Plane Array Fixed Pattern Noise GPIO General Purpose IO... -
Page 83: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
FLIR LEPTON® Engineering Datasheet Reduction of Hazardous Substances RoHS ROIC Readout Integrated Circuit SBNUC Scene-based Non-uniformity Correction Signal to Noise Ratio System on a Chip Serial Peripheral Interface Software-based Video Processing Temperature Coefficient of Resistance Two-wire Interface VoSPI Video Over SPI... -
Page 84: The Information Contained Herein Does Not Contain Technology As Defined By The Ear, 15 Cfr 772, Is Publicly Available
LEPTON® Engineering Datasheet © FLIR Commercial Systems, 2014. All rights reserved worldwide. No parts of this manual, in whole or in part, may be copied, photocopied, translated, or transmitted to any electronic medium or machine readable form without the prior written...
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