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...References References 1. “Six autofocusing compact 35s” Popular Photography Nov., 1983, p. 94. Letters and specification sheets from: Mark Carmany, Pentax Corp.; John J. Jonny, Minolta Corp.; Jeffery M. Karp, Ricoh Corp.; Scott J. Leibow, Nikon Inc. 2. The sensor is an infrared...

... and specification sheets from: Mark Carmany, Pentax Corp.; John J. Jonny, Minolta Corp.; Jeffery M. Karp, Ricoh Corp.; Scott J. Leibow, Nikon Inc. 2. The sensor is an infrared-sensitive silicon diode. The source is an infrared emitting diode (IRED). They operate at about 900-nm wavelength. Both devices can...