Laser protective device
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United States of America Patent
Stats
-
May 18, 1993
Grant Date -
N/A
app pub date -
Apr 3, 1990
filing date -
Apr 3, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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