An optic fiber grating diffraction screen is developed by use of optical diffraction. Combining with computer neural network, a vision system for recognizing stereo shape is developed.
利用光学衍射原理，研制成了光纤光栅衍射屏，并与计算机神经网络相结合，开发了一种识别立体形状的视觉系统。
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。
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.
推导了圆孔衍射公式，该公式不受孔径大小和到屏距离的限制，可以作为近场光学的理论。
The diffraction orders of the grating type structure on the liquid crystal display screen are utilized in this system.
它采用液晶显示屏作为输入器件，用液晶光阀记录和显示联合功率谱。
The diffraction orders of the grating type structure on the liquid crystal display screen are utilized in this system.
它采用液晶显示屏作为输入器件，用液晶光阀记录和显示联合功率谱。
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