Image reading device with different reflectivity coefficients in

Details Image reading device with different reflectivity coefficients in Image reading device with different reflectivity coefficients in

1990-10-09

1992-03-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358482, H01J 4014

Patent

active

051010992

ABSTRACT:
An image reading device in which light receiving elements formed on a first substrate are disposed in opposition to light emitting elements formed on a second substrate with a transparent layer being interposed therebetween. The transparent layer is made of a material whose reflectivity is smaller than that of the second substrate. In another embodiment, gas layers are provided between the transparent layer and the light emitting elements and the gas therein has an index of refraction less than the second substrate. Light transmitting windows provided in an opaque electrode of the light emitting elements have peripheral portions where no light is emitted.

REFERENCES:
patent: 4675534 (1987-06-01), Sekimura et al.
patent: 4742239 (1988-05-01), Nakagawa et al.
patent: 4805032 (1989-02-01), Watanabe et al.

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