Photo-to-photo conversion element and its applied system

Details Photo-to-photo conversion element and its applied system Photo-to-photo conversion element and its applied system

1990-02-27

1991-10-08

LaRoche, Eugene R.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

35821313, 358209, 359245, G02F 101, H04N 314

Patent

active

050548921

ABSTRACT:
A photo-to-photo conversion element is disclosed. The element has, in an arranged sequence in line: a first optical member having a wavelength selectivity permitting passage of a write light having a first wavelength range and blocking an erase light; a first transparent electrode; a photoconductive layer; a second optical member having a wavelength selectivity permitting reflection of a read light having a second wavelength range and passage of the erase light; a third optical member for electrooptically modulating a light incident thereto through the second optical member in response to the strength distribution of an electric field applied thereto; and a second transparent electrode. The erase light has a wavelength outside of both the first and second wavelength ranges.

REFERENCES:
patent: 4480269 (1984-10-01), Yoshida et al.
patent: 4583122 (1986-04-01), Ohwada et al.
patent: 4831452 (1989-05-01), Takanashi et al.
patent: 4920417 (1990-04-01), Takanashi et al.

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