Journal of the Korean Institute of Telematics and Electronics A (전자공학회논문지A)
- Volume 33A Issue 5
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- Pages.132-141
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- 1996
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- 1016-135X(pISSN)
Design of pixelated phase gratings for optical image generation
광영상 발생을 위한 화소형 위상격자의 설계 및 제작
- Lee, Deug-Ju (Dept. of Computer & Communication Eng., Chungbuk National Univ.) ;
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Kim, Nam
(Dept. of Computer & Communication Eng., Chungbuk National Univ.) ;
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Lee, Kwon-Yeon
(Dept. of Electronic Eng., Sunchon Univ.) ;
- Eun, Jae-Jeong (Dept. of Electronic Eng., Changwon Univ.)
- Published : 1996.05.01
Abstract
The pixelated phase grating has been studied as a kind of diffraction gratings splitting and input beam into multiple spots. It consists of regular size cells which produce phase delays, and each cell provokes the phase delay up to sixteen levels. We have compared and analyzed the characteristics of multi-level phase gratings, laying streess on efficiency and resulted pattern. Experimental resutls obtained form fabricated grating have been presented, and the real-time method using a liquid-crystal spatial light modulator has been demonstrated through experiments. Gratings making meams with specific intensities have been designed and optical images have been generated by them. In order to specific intensities have been designed and optical images have been genrated by them. In order to decide the phase delay of each cell, optimization conditon consists of diffraction efficiency and target values. One period of phase gratings fabricated with surface relief was less than 256
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