An optic fiber grating diffractionscreen is developed by use of optical diffraction. Combining with computer neural network, a vision system for recognizing stereo shape is developed.
In this paper, liquid crystal phase grating large screen protection system is introduced, and its fundamental diffraction characteristics are discussed.
本文介绍了一种液晶相位光栅大屏幕投影系统,讨论了液晶相位光栅的基本衍射特性。
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A general diffraction formula for circular apertures is derived. This formula is not limited by the aperture radius and the distance from the screen and can be used as a theory of near field optics.