Infrared diagnostic instrument

Details Infrared diagnostic instrument Infrared diagnostic instrument

1988-08-24

1990-02-06

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250239, 2503381, G01J 144

Patent

active

048990523

ABSTRACT:
A diagnostic instrument (10) for testing the functioning of an infrared radiation emitter (14) contained within a VCR (12) or other electrical equipment is disclosed. The instrument (10) comprises a housing (16) and an electronic circuit received within the housing (16) for detecting the presence of infrared radiation. The electronic circuit comprises a battery (26) or other DC power source electrically connected in series with an infrared sensitive photodetector (22) and a status LED (24) which is illuminated when the photodetector (22) is exposed to infrared radiation produced by the emitter (14). A switch (18) is provided for selectively turning the instrument (10) on and off. A battery condition LED (20) is also provided.

REFERENCES:
patent: 2976419 (1961-03-01), Menke et al.
patent: 3754139 (1973-08-01), Swithenbank et al.
patent: 3838465 (1974-09-01), Fischer et al.
patent: 3919631 (1975-11-01), Brown
patent: 4343024 (1982-08-01), Kawai

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