Variable focal length lens

Details Variable focal length lens Variable focal length lens

1985-12-30

1988-11-08

Corbin, John K.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

350382, 369110, G02F 119

Patent

active

047831529

ABSTRACT:
There is disclosed a variable focal length lens comprising: an optical element showing substantially different refraction characteristics depending on polarization characteristics of an incident light beam, first optical unit for controlling the polarization characteristics of the beam incident on said optical element; and second optical unit for controlling the polarization characteristics of the light subjected to predetermined refraction by the optical element, the second optical unit being interlocked with the first optical unit.

REFERENCES:
patent: 3520592 (1970-07-01), Leib et al.
patent: 3658409 (1972-04-01), Shimbo et al.
patent: 4037929 (1977-07-01), Bricot et al.
patent: 4124273 (1978-11-01), Huignard et al.
patent: 4264986 (1981-04-01), Willis
patent: 4466703 (1984-08-01), Nishimoto
patent: 4564267 (1986-01-01), Nishimoto

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