Laser protective device

Details Laser protective device Laser protective device

1990-04-03

1993-05-18

Hille, Rolf

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359250, 359246, G02F 103

Patent

active

052125858

ABSTRACT:
A laser sensor protector is provided comprising a nonlinear dynamic device which has a flat broad band reflectance covering the entire visible range in the on-state and allows for good optical quality and high transmittance (80-90) in the off-state. The device can be constructed using electro-optic materials or nonlinear optical materials. If electro-optical materials, i.e., those for which the refractive index can be controlled by an external field, or nonlinear optical materials, i.e, those for which the refractive index can be controlled by the light intensity, are used to construct the present invention, it is possible to achieve dynamic switching, that is, the device is clear in the off-state and it is highly reflective over a broad band in the on-state.

REFERENCES:
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patent: 3989355 (1976-11-01), Wilmer
patent: 4240696 (1980-12-01), Tracy et al.
patent: 4247166 (1981-01-01), Yeh
patent: 4589737 (1986-05-01), Sashital
patent: 4786128 (1988-11-01), Birnbach
patent: 4985179 (1991-01-01), Seo et al.
patent: 5002369 (1991-03-01), Sakata
patent: 5054892 (1991-10-01), Takanashi et al.

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