Optoelectronic device for contactless measurement of the dimensi

Details Optoelectronic device for contactless measurement of the dimensi Optoelectronic device for contactless measurement of the dimensi

1988-05-18

1990-04-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356387, G01N 2186

Patent

active

049143077

ABSTRACT:
An optoelectronic device for the contactless measurement of objects includes an opaque hollow body with an opening for the introduction of the object to be measured. At least one emitter diode and an associated photovoltaic cell are arranged in the cavity of the body in a common plane perpendicular to the direction of introduction of the object to be measured. In use, an object introduced into the body in a predetermined direction can be interposed between the emitter diode and the photovoltaic cell so as to project on to the latter a shadow which is a function of its transverse dimensions. Conveniently, two intersecting emitter diode photovoltaic cell pairs can be arranged in the body.

REFERENCES:
patent: 2895373 (1959-07-01), Eyraud
patent: 3193689 (1965-07-01), Kerr
patent: 3774040 (1973-11-01), Stephanos
patent: 4110627 (1978-08-01), Isherwood
patent: 4260260 (1981-04-01), Letort et al.
patent: 4267443 (1981-05-01), Carroll et al.
patent: 4747911 (1988-05-01), Polson
patent: 4773029 (1988-09-01), Claesson et al.

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