Photorestrictive device controller and control method therefor

Details Photorestrictive device controller and control method therefor Photorestrictive device controller and control method therefor

1996-09-25

1998-06-30

Font, Frank G.

Optical: systems and elements

Optical modulator

Light wave directional modulation

359323, 359246, 359279, G02F 129

Patent

active

057742596

ABSTRACT:
A photostrictive device controller and a photostrictive device control method, which can produce a fast response without causing a sharp temperature rise when driving the photostrictive device. The photostrictive device controller comprises: a light source 2 for applying light to the photostrictive device 1 that, upon receiving light, produces a photostrictive effect; an illumination optics 3 for introducing light from the light source 2 onto the photostrictive device 1; and a control device 4 for controlling the energy density of light applied to the photostrictive device 1. The control device 4 of the controller controls the illumination optics device 3 to lower, at a point close to where the photostrictive effect of the photostrictive device 1 is saturated, the energy density of the irradiated light to a level at which the elongation caused by heat can be ignored.

REFERENCES:
patent: 5383048 (1995-01-01), Seaver
patent: 5585961 (1996-12-01), Saitoh et al.

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