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Cheetah-640CL TE3

High resolution water-cooled InGaAs-camera

Cheetah-640CL TE3 for low light level imaging and spectroscopy

The Cheetah-640CL TE3 camera is a high resolution, compact infrared camera, equipped with a dedicated low noise InGaAs detector array working from 0.9 μm up to 1.7 μm.

With its TE3 cooled sensor and water-cooled camerahead, the Cheetah-640CL TE3 is a highly sensitive camera achieving ultra low dark current at long integration times. It offers you an excellent measurement tool to image low light levels in the SWIR range such as for semiconductor failure analysis or for luminescence spectroscopy applications.

The Cheetah-640CL TE3 is delivered with a software development kit which offers direct access to various camera settings and allows easy integration with your own CameraLink image grabbing system.

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Benefits & features

  • High resolution
    640x512 Pixels for high resolution SWIR images
  • Low dark current
    Low dark current allows for longer integration times and better signal to noise ratios
  • Flexible GUI and SDK
    SDK (Software Developing Kit) available for all cameras - samples available for C++, LabView
  • No need for LN2 cooling
    For most applications, SWIR InGaAs cameras can work without liquid nitrogen cooling
  • Spectrograph compatible
    These cameras have mounting holes for spectrographs, making them suitable for (hyper)spectral imaging applications
  • High quantum efficiency (> 80 %)
    Quantum efficiency (QE) is the ability of a detector to convert photons into electrons

Designed for use in

  • Fluorescence
    Fluorescence is the emission of light by a substance that has absorbed light. SWIR cameras are used for fluorescence imaging in medical applications
  • R&D (SWIR range)
    SWIR range is a relatively unexplored range and hence providing much research opportunities.
  • Emission microscopy
    Optical fault localization technique in micro-electronics industry based upon faint electroluminescence signals
  • Semiconductor failure analysis
    Failure analysis of a semiconductor components based on photon emission
  • Low light level imaging spectroscopy: raman, emission, photoluminescense, absorbance
    Detection of faint light levels in SWIR wavelength range


Compatible with a variety of framegrabbers

Several compatible frame grabbers for CameraLink interface are available

IR camera software included

Xeneth camera control and imaging software is included


External trigger for signal synchronization

Windowing mode

Imaging in a reduced window of interest for increased frame rates

14 bit image

Digitization: The camera uses a 14 bit ADC

Multi-stage cooling

Thermo-electric or Peltier cooling in 3 stages

High sensitivity

Low noise for detection of small signals

Spectrograph compatible

Mounting holes available for spectrograph mounting

High resolution

640x512 pixel resolution

High dynamic range

High dynamic range mode available

Camera specifications

Array Specifications

Array Specifications Cheetah-640CL TE3
Detector type InGaAs
Spectral range 0.9 μm to 1.7 μm
Image format 640 (w) x 512 (h) pixels
Pixel pitch 20 μm
Peak Quantum Efficiency (QE) 80%
ROIC noise High gain: 60 e-; low gain: 400 e-
Conversion gain High gain: 20 μV/e-; Low gain: 1.6 μV/e-
Array cooling TE3-cooled
Pixel operability > 99 %

Camera Specifications

Camera Specifications Cheetah-640CL TE3
Focal length Broad selection of lenses available
Optical interface C-mount - Spectrometer holes
Imaging performance
Maximum frame rate (full frame) 110 Hz
Integration type Snapshot
Exposure time range up to 20s in HG mode
Min region size Minimum size 32 x 4
Analog-to-Digital (ADC) 14 bits
Command and control CameraLink (LVDS voltage levels)
Image acquisition Base CameraLink (14 bit)
Trigger Trigger in and out (3.3 V CMOS)
Power requirements
Power consumption < 4 W without TEC operation; 60 W at maximum cooling
Power supply DC 12 V
Physical characteristics
Camera cooling Water cooling
Ambient operating temperature range 0°C to 50°C
Dimensions (width x height x length) - excluding lens (approximately) 140 x 135 x 90 mm
Weight (excluding lens) 2 kg

Broad range of accessories available

Lens & filter options


  • Xeneth
  • Xeneth SDK (optional)
  • Xeneth Labview SDK (optional)


Application notes
SWIR cameras for timely defect detection ensure higher yields in solar cell production. SWIR cameras for timely defect detection ensure higher yields.
Sensitive infrared InGaAs cameras detect weak electroluminescent radiation emitted by thin-film solar cells Electroluminescence analysis improves the quality of solar cells
Technical documents
ASY-000200B Cheetah CL - TE3 This file contains all the technical documents for the Cheetah TE3.
Laser beam profiling and infrared cameras In this white paper, we will address the general need for laser beam profile analysis. Further, we will briefly describe laser beam analysis instruments and give an overview of laser applications, in particular for infrared wavelengths.
Press Releases
Better image quality at no additional cost By strengthening its production capabilities and optimizing processes, Xenics is happy to announce a significant reduction of dark current its standard InGaAs SWIR detectors.


Scientific brochure Cheetah-640CL TE3

Extreme compact size and low weight

Given the extremely compact size and low weight of the Xenics XS-1.7-320 SWIR camera it was extremely easy to integrate it into our existing optical setup.

University of Strathclyde