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You are here: Home Products LARRY USB3648+ : Scientific-grade CCD Linear Array Detector

Sunday22 May 2022

LARRY USB3648+ : Scientific-grade CCD Linear Array Detector

3648-element Linear Array CCD Detector
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The LARRY USB3648+ is a CCD linear array detectors that offers cost-effective, scientific-grade performance for a wide range of spectroscopic applications.  It can be mounted to most spectrographs that have the output plane 10mm outside of the spectrograph. Standard and custom mounts are available.   .

The LARRY series is based on proven Ocean Optics electronics and is compatible with Ocean Optics software, enabling a broad scope of features.  The detectors connect to and are controlled by a PC (Windows 7, 8, ) via USB 2.0, allowing for easy-to-use, plug-and-play operation.  Multiple detectors can be controlled, enabling simultaneous acquisition.  GPIO communication can also be used to integrate with other instruments and devices.

The linear CCDs used in the LARRY series contain built-in electronic shutters, which allow for integration times down to 1 ms without the need for external shutters.


  • 2048 and 3648 pixel linear arrays
  • 14 μm and 8 μm pixel width & spacing
  • pixel height 200 microns for spectroscopic applications
  • Scientific grade,no fringing
  • Fast, built-in electronic shutter capability
  • Max. dynamic range >2000:1
  • Spectral range: 200-1100 nm
  • Rapid acquisition up to 500 spectra/second with 1ms integration time
  • USB3648+ detector optional short pulse mode, integration times down to 10 microseconds with real time acquisition rates.
  • USB 2.0 for plug-and-play PC control
  • Powered via USB
  • GPIO for easy integration with other instruments and devices
  • External trigger and sync output via SBC (subminiature BNC) with programmable delays for synchronization to pulsed sources


  • Upgrade optical spectrometers to linear CCD array capability
  • Capturing spectra of short-pulse events
  • Synchronization to pulsed lasers and light sources
  • Fringe analysis, beam profiling/monitoring
  • Synchronous and simultaneous detection with multiple detectors
  • Thorlabs cage mount  interface available


  • USB 2.0 for computer control and power supply
  • Trigger SubMiniature BNC (SMB), TTL input for external trigger
  • Sync SMB, programmable TTL output for synchronizing other devices with the detector
  • Additional SMB connector for a customizable connection
  • 22-pin accessory connector for detector monitoring and GPIO communication
Number of sensitive pixels 3648
Number of masked dark pixels   13
Pixel size   8 μm (w) × 200 μm (h)
Array length (active)   29.1 mm
Spectral range                                       
Integration time   3.8 ms – 10 sec
10 -1000μs option also available1
Well capacity (WC)   100,000 e-
16-bit ADC output  
Saturation level @ 633 nm 9.5 nJ/cm2
1.5 × 10-4 nJ per pixel
Readout noise (RN)   46 e- rms
Dark signal non-uniformity
            1-sec integration
            10-sec integration

571 e- rms
1739 e- rms
Dark signal offset  
Dark noise
            1-sec integration
            10-sec integration

69 e- rms
128 e- rms
Maximum dynamic range 
(WC / RN)
Readout time   3.8 ms
Spectral rate2
            High-speed acquisition