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Enhancements for versatile Goldeye SWIR cameras

7 Sep 2017

The performance of the versatile Goldeye SWIR cameras from Allied Vision has been further enhanced with some new firmware updates. These provide contrast enhancement and improvements to the readout modes of the camera. AV Goldeye cameras provide uniform sensitivity in the short wave infrared (SWIR) spectrum from 900 – 1700 nm and are available in GigE Vision and CameraLink versions with a choice of resolutions.

Goldeye cameras produce outstanding low-noise images with a high dynamic range thanks to a high sensitivity InGaAs sensor with active thermoelectric cooling. A version with additional external cooling is also available, which is optimised for scientific grade applications that require long exposure times.

All the cameras in the range have the same compact and ruggedized housing (55 mm x 55 mm x 78 mm) and comprehensive feature set. This includes non-uniformity correction and pixel defect and background correction for the sensor.

This feature set has been further enhanced with the new firmware updates:

  • The new auto-contrast enhancement analyzes the histogram of the previous image and stretches it automatically to certain definable limits in the current one. This is especially useful in applications with limited contrast such as semiconductor inspection.
  • A new Integrate-then-Read mode (ITR) has been implemented for an external trigger. This allows a snapshot image to be acquired before it is read out.
  • Goldeye cameras can also be used in an ‘integrate while reading‘ mode where image integration takes place during readout of the previous image data.

The new firmware improves image quality in this mode by providing a correction to compensate for any trigger-induced distortions in the image.

The cameras also provide a host of features such as automatic exposure time control and trigger control. Comprehensive I/O control options simplify the connection to image processing software.

Goldeye cameras are very sensitive in the SWIR spectrum and are well-suited for many applications in a wide variety of industries:

  • Semiconductor industry: solar cell and chip inspection
  • Recyling industry: plastics sorting
  • Medical imaging, sciences: hyperspectral imaging, microscopy, OCT
  • Metal and glass industry: thermal imaging of hot objects (250 °C to 800 °C)
  • Agriculture industry: airborne remote sensing
  • Printing industry: banknote inspection
  • Electronics industry: laser beam profiling
  • Surveillance and security: vision enhancement (e.g., through fog or night vision)

Hyperspectral imaging is made possible through the addition of a spectrograph to separate the wavelengths reaching the camera. The 900 – 1700 nm region of the spectrum is particularly important for hyperspectral imaging since this is where many of the unique absorption bands occur that feature in the ‘chemical footprint’ of organic materials.

Allied Vision Goldeye

The compact cameras with their active thermo electric cooling sensors provide low-noise image quality, even with very long exposure times. Comprehensive I/O control and a particularly robust housing predestine the Goldeye series for use in industrial applications.