Variable-focal-length lens using an electrooptic effect

Details Variable-focal-length lens using an electrooptic effect Variable-focal-length lens using an electrooptic effect

1982-03-17

1984-08-21

Arnold, Bruce Y.

350388, 350393, 350403, G02F 129

Patent

active

044667035

ABSTRACT:
A novel arrangement of variable-focal-length lens using an electrooptic effect is provided. A variable electric field is applied to an electrooptic crystal to produce therein a refractive index distribution having a lens action. The applied electric field is such that the intensity distribution of the lens varies along one direction in a plane normal to the direction of the light incidence but which has a uniform intensity distribution in the direction normal to this direction. A two-dimensional variable-focal-length lens is obtained by combining two such one-dimensional lenses in such manner that the two-lenses intersect each other at right angles with respect to the direction of the lens action. Also, a refractive index distribution having a two-dimensional lens action is produced to form a variable-focal-length lens when an electric field having an intensity distribution which varies within the plane normal to the direction of the incident light is applied to the electrooptic crystal.

REFERENCES:
patent: 3239671 (1966-03-01), Buhrer
patent: 3614200 (1971-10-01), Taylor
patent: 3630597 (1971-12-01), Hulme
patent: 4124273 (1978-11-01), Huignard et al.

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