Design of a photographic objective using cubic phase plate
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Design of a photographic objective using cubic phase plate
Optics and Precision EngineeringVol. 15, Issue 7, Pages: 1026-1031(2007)
作者机构:
1. 中国科学院 长春光学精密机械与物理研究所,吉林 长春,130033
2. 南开大学 现代光学研究所光电信息技术教育部重点实验室 天津,300071
作者简介:
基金信息:
DOI:
CLC:TB851.1
Received:07 January 2007,
Revised:29 May 2007,
Published Online:30 July 2007,
Published:30 July 2007
稿件说明:
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YANG Hao-ming, ZHANG Xin, FANG Zhi-liang, et al. Design of a photographic objective using cubic phase plate[J]. Optics and precision engineering, 2007, 15(7): 1026-1031.
DOI:
YANG Hao-ming, ZHANG Xin, FANG Zhi-liang, et al. Design of a photographic objective using cubic phase plate[J]. Optics and precision engineering, 2007, 15(7): 1026-1031.DOI:
Design of a photographic objective using cubic phase plate
An optical/digital imaging system is proposed. This system uses a cubic phase element and digital image processing to increase the depth of focus in keeping the same illumination and resolution. Two positions
-1.6
λ(λ
=550 nm)and in focus
are analyzed in simulation. Then both modulate transformation function (MTF) and the relationship between the MTF and focus in a longer depth of focus are given. Using the imaging simulation tools CodeV
the simulation images are obtained. After digital processing
the final image is also obtained. Experimental results show that this new optical/digital system can increase the depth of focus by 6 times at least.