Image detecting unit having emitting means and light receiving m

Details Image detecting unit having emitting means and light receiving m Image detecting unit having emitting means and light receiving m

1990-10-29

1992-09-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022729, 358484, H01J 516

Patent

active

051460823

ABSTRACT:
An image detecting unit includes a light emitting system for emitting a light beam which is projected onto a surface of a document and a light receiving system for receiving a light obtained by a reflection of the light emitted from the light emitting system on the surface of the medium. The light receiving system includes optical waveguides and photoelectric conversion devices coupled to the optical waveguides. The light emitted from the light emitting system is projected on an area on the surface of the document, to which an end surface of the optical waveguide is opposed, and an incident angle .phi. of the light incident on the surface of the document is determined by the following formula;

REFERENCES:
patent: 4227078 (1980-10-01), Yamamoto et al.
patent: 4233506 (1980-11-01), Yamamoto et al.
patent: 4495412 (1985-01-01), Thoone et al.
patent: 4671612 (1987-06-01), Sakurai et al.
patent: 4942481 (1990-07-01), Yoshinouchi et al.

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