REDLAKE MASD, INC.
1.2 The Imager Responsivity Curves
The camera head has either the TC236 (color) or TC237 (monochrome) CCD imager. These
imagers have the same characteristics. 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 monochrome camera.
Imagers and 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 across the range of visible light
without a filter.
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.
Green
Blue
Red
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.
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9400-0010 Rev S
1-2
02/15/02
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