| 摘要 |
The present invention is an adaptive laser protection device which adaptively forms a reflection holographic optical element to reflect away incident laser radiation. The laser protection device includes a layer of a nonlinear optical material which has an index of refraction varying with light intensity, a transparent layer having a depth greater than the coherence length of the expected ambient illumination and less than the coherence length of the expected laser radiation, and a partially reflecting layer on the far surface of the transparent layer. Laser radiation incident on the laser protection device forms an interference pattern in the nonlinear optical material between directly incident light and light reflected from the partially reflecting layer. This interference pattern within the nonlinear optical material causes the formation of a holographic optical element due to varying indices of refractions. The geometry of the holographic optical element substantially reflects away the incident laser radiation protecting the user. The preferred embodiment includes a transparent substitute for supporting the device and an optical filter to limit incident light to a predetermined band.
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