Paper
16 September 2002 Self-focusing difference frequency grating filter
Xianming Ji, Renwang Mu, Liangkai Han, Jin Zhou, Wenqi Guo
Author Affiliations +
Abstract
A phase type optical image differential filter made by binary optical method is presented in this paper. It combines two phase type Ronchi gratings which have close frequency with off-axis phase-Fresnel-zone plate, called self-focusing differential frequency grating filter. It has several advantages such as high diffraction efficiency, simple optical path and convenient operation.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xianming Ji, Renwang Mu, Liangkai Han, Jin Zhou, and Wenqi Guo "Self-focusing difference frequency grating filter", Proc. SPIE 4929, Optical Information Processing Technology, (16 September 2002); https://doi.org/10.1117/12.483250
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KEYWORDS
Optical filters

Zone plates

Diffraction

Optics manufacturing

Diffraction gratings

Image filtering

Convolution

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