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detector_2011_sch.jpg

detector_2011_sch.jpg

The IR detector is reworked. New photo diodes and transistors are tested. Additional precautions are taken to to reduce the influence of ambient light. The external controller can affect this value via the sense control line. The measurement time is 40 usec, 20 usec ambient light and 20 usec ambient+IR laserlight. The difference indicates whether there is anything infocus. This small module is built into the AF60/2.8D Micro lens. An extra IR bandpassfilter is used before the photodetector reducing the range from 850 to 1050 nm.


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