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laser spot scorer

Invariant developed a laser spot scoring (LSS) system in support of laser designator testing used by laser guided munitions. The system consists of two sensors. The first is a high speed, extended spectral range CCD with a 30-degree FOV optic and a 1064 nm laser line filter. This camera has a GigE video interface that transports data via an Ethernet connection. The resolution of the camera, distance to the target and the camera FOV determines the laser spotting location accuracy.


The second sensor is a high speed InGaAs photodiode. The detector also has a 1064 filter to eliminate response from wavelengths that are not of interest. The detector has an analog output that is sampled to measure the duration since the previous pulse. The CCD camera images the laser energy for use by the software spot position processing, while the InGaAs sensor provides temporal pulse duration time.


This pulse timing is used to calculate pulse repetition frequency (PRF) or can be used to verify PIM coding if that mode has been selected by the user. The two sensors are factory calibrated and aligned for operation. A GPS antenna is mounted to the top of the chassis and is used to synchronize recorded data to other telemetry collected during the test.  This system is used for verification of the laser spot in conjunction with HELLFIRE testing.




LSS Capabilities:

  • Grades Laser Spot Jittering in Real-time

  • Verifies Current Sensed Laser Codes

  • Records 14 bit Digital Video for Playback or Re-scoring

  • Records time Duration Between Laser Pulses

  • Witness Camera Analog Output


LSS Components:

  • On-board GPS Proving Time Synchronization between All Sensors

  • High Speed, In-band Single Element Detector to Determine Laser Pulse Frequency

  • High Resolution 14 bit Gig-E Digital Camera and Analog Witness Camera Output

  • User Interface Supporting Real-time Display, Scoring, and Playback

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