BIRD - Universal Electro-Optic Test Bench For IR Detectors

Calibration and test of IRFPA detectors:

  • Noise tests: fixed pattern noise, temporal noise, NETD responsivity, detectivity, 3D-noise, 2D-detectivity,
  • Dynamic range, linearity,
  • Non-uniformity correction,
  • Bad pixel localisation,
  • Spectral response,
  • Crosstalk, MTF.

BIRD brochure

Designed for exhaustive testing of IRFPA detectors

BIRD fully integrated test bench

The BIRD210 bench consists of an electronic cabinet equipped with a set of ultra-low noise electronics including a clock signal generator, a bias voltage unit and a high frequency analogue to digital converter. An optical bench illuminates the detector under test with accurate and calibrated optical signals: a low temperature uniform and highly stabilized IR reference source for noise measurements, NUC and bad pixel tests, an adjustable IR source with high spectral resolution for spectral response measurements and an aberration-free pinhole or thin slit source for MTF and crosstalk tests.

The BIRD software has the following features:

  • User–friendly interface for clock signal design, pixel remapping, bias voltage settings and A/D parameter definition and application of these parameters and signals to the detector,
  • Setting of parameters for testing functions such as temperatures for noise measurement and NUC, criteria for bad pixel localisation (up to 6 criteria), spectral range for spectral response analysis, etc.
  • Automatic control of the opto-mechanical elements of the optical bench (translation stages, blackbodies, monochromator) depending on the selected functions and the corresponding settings,
  • Acquisition and processing of the detector’s video signal, including the exclusive noise and responsivity optimisation as a function of the bias voltage values,
  • Display and recording of the complete tests results.

Multi-configuration test solution for any type of detector

Multi-configuration is achieved thanks to an optical table equipped with a mechanical system for the selection of sources. The basic equipment for noise tests configuration of BIRD210 includes:

  • Bias voltage unit,
  • Clock signals generator,
  • Analog to digital converter,
  • Computer with acquisition board and BIRD software,
  • DCN1000H4 low temperature blackbody.
BIRD Specifications

MTF/crosstalk configuration

  • RCN1200N1 high temperature cavity blackbody,
  • Aberration-free F/1.5 Cassegrain optics and/or F/1 LWIR optics,
  • Set of 8 thin slits and pinholes,
  • Three motorized translation stages with 1 μm resolution assembly for accurate selection of pixel.

Spectral response configuration

  • RCN1200N1 high temperature cavity blackbody,
  • Monochromator equipped with gratings and filters to cover the 1.1 μm to 12 μm spectral range (additional gratings and filters in option to cover the 0.4 μm to 18 μm spectral range). Typical spectral resolution: 1%.
  • Spectral response calibration set including chopper, pyroelectric detector and lock-in amplifier.

Visible detectors configuration

  • Visible CMOS detector can be tested through the addition of visible sources to the above configurations.
BIRD software screenshots

See also...