The Cheetah-640-CL camera is the fastest InGaAs infrared camera in the world.
Hyperspectral imaging, or imaging spectroscopy, is a happy fusion of spectroscopy and imaging processing. Hyperspectral imaging can be seen either as an extension of classical image processing or an enhancement of classical spectroscopy.
The simplest case is to use a black and white camera that captures the grey-scale values of objects. This yields a high surface resolution but no spectral information.
On the other hand, a color camera (with three image sensors or a sensor with Bayer color filter) delivers a multi-spectral image with comparably high spatial resolution and three relatively broad-band color channels of red, green and blue. The downside is that these channels have a relatively low spectral resolution.
Finally, a spectral imaging system that operates with just one sensor and a tunable narrow-band filter placed in the optical path to select a frequency. Alternatively, it functions as a so-called push-broom scanner to perform a line-based scan. For every pixel in every line, the spectrum is captured and stored.
Both methods use significantly more color channels. This is why they are called hyperspectral. They deliver high spatial resolution and, at the same time, high spectral resolution. The measured data of the X- and Y-coordinates and the radiation components at certain frequencies are located in a three-dimensional data space (cube).
Hyperspectral imaging proves its worth in the acquisition of geological parameters from the air or by satellite. It is, for example, used to examine the water quality of lakes. On a microscopic scale, the method can be applied for multi-channel spectral analysis of light-emitting semiconductors, or in bio-medical and chemical sample analysis. Furthermore, hyperspectral imaging is perfectly suited for industrial process monitoring in waste sorting, fruit and vegetable inspection, moisture measurements, fat analysis, web inspection, … and many more applications.
Some hyperspectral applications require high speed SWIR imaging. For these applications we offer the Cheetah-640-CL SWIR camera and the Lynx-Series SWIR line scan cameras. The Cheetah-640-CL SWIR InGaAs camera features a frame rate up to 1730 Hz at 640 x 512 pixels. The Lynx achieves line rates up to 40 kHz. Both are well-suited for the high frame rate image acquisition needed in these applications.
For hyperspectral imaging applications where cost, size and power are critical, our Bobcat-Series offers a solution with no compromises on quality. In this line we offer the Bobcat-320, Bobcat-320-Gated, Bobcat-640-CL and Bobcat-640-GigE SWIR InGaAs camera.