Image reading device having a light waveguide means widened towa

Details Image reading device having a light waveguide means widened towa Image reading device having a light waveguide means widened towa

1991-01-15

1993-03-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

25022720, H01J 4014, H01J 516

Patent

active

051986558

ABSTRACT:
An image reading device includes: a light emitting element for irradiating light on an image surface; a light receiving element for receiving image information in the form of reflected light from the image surface; and light waveguide passages provided between the light emitting element and the image surface and between the light receiving element and the image surface, respectively, and at least the light waveguide passage for the light emitting element is widened at an end surface thereof at the image surface to a width wider than at the end surface at the light emitting element.

REFERENCES:
patent: 3248554 (1966-04-01), Wu Chen
patent: 3953730 (1976-04-01), Henry et al.
patent: 4379225 (1983-04-01), Apothaker
patent: 4616129 (1986-10-01), Yamada et al.
patent: 4734783 (1988-03-01), Horikawa
patent: 4851921 (1989-07-01), Sato et al.

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