REDLAKE MASD, INC.
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9400-0024 Rev G
1-2
05/15/01
1.2 The Imager Responsivity Curves
The camera has a TC237 monochrome CCD imager. The imaging sensor has an image area of
658 (H) x 496 (V) pixels, each pixel being 7.4 microns square. The imager has a built-in
electronic shutter to limit the exposure, see
Appendix C. All standard cameras have the
CM500 1mm IR filter. The filter is omitted on
the low light version of the camera.
Imagers. Filters are installed at the factory
and cannot be changed in the field.
1.2.1
The Imager Base Characteristics
Figure 1-1 gives the responsivity and
sensitivity of the TC237 monochrome CCD
imager without a filter across the range of
visible light to the near IR band.
Figure 1-1 The Spectral Characteristics of the TC237 Sensor.
1.2.2
Spectral Response with a CM500 IR Filter
Figure 1-2 shows the response of the red, green and blue signals from the TC236 imager with the
IR filter installed.
Figure 1-2 The Response of the RGB Signal with an IR Filter.
1.2.3
The Effect of the IR Filter.
Figure 1-3 shows the blocking effect of the
1-mm CM500 IR filter.
Figure 1-3 Filter Blocking Characteristics.
Blue
Green
Red
