Active infrared sensor

Details Active infrared sensor Active infrared sensor

2005-07-19

2005-07-19

Hannaher, Constantine (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06919567

ABSTRACT:
An optical transmitter is equipped with a transmitted pulse modulator at which a plurality of optical transmission patterns have previously been stored. The respective stored optical transmission patterns have mutually different ratios between infrared pulse ON times and OFF times. The optical output of infrared signal(s) transmitted from an optical transmitter is made variable as a result of the fact that infrared pulse(s) output during infrared output period(s) is/are output in accordance with an optical transmission pattern which is selected from among the plurality of optical transmission patterns.

REFERENCES:
patent: 4516115 (1985-05-01), Frigon et al.
patent: 5142398 (1992-08-01), Heep
patent: 5675150 (1997-10-01), Kunz
patent: 6476947 (2002-11-01), Harvey
patent: 2001-188970 (2001-07-01), None

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