Investigation of optical testing with a phase-only liquid crystal spatial light modulator
Optics Express, Vol. 13, Issue 4, pp. 1059-1065 (2005)
http://dx.doi.org/10.1364/OPEX.13.001059
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Abstract
We illustrate that the phase-only liquid crystal spatial light modulator (LC SLM) can be used for optical testing. The large phase change and the phase modulation precision are discussed. The computer generated holograms (CGH) method is used to acquire the significant phase modulation. And the phase modulating characteristics of the LC SLM are measured. It shows the phase modulation depth is more than 2π and the modulation precision is down to 1/14λ (PV) and 1/100λ (rms) (λ=632.8nm). In order to verify this method, the former surface of a convex lens is tested by ZYGO interferometer. The parallel straight fringes are obtained. It is shown that PV is 1/3λ and rms is 1/20λ after compensated by the LC SLM.
© 2005 Optical Society of America
OCIS Codes
(090.1760) Holography : Computer holography
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(220.4840) Optical design and fabrication : Testing
(230.3720) Optical devices : Liquid-crystal devices
(230.6120) Optical devices : Spatial light modulators
ToC Category:
Research Papers
History
Original Manuscript: January 7, 2005
Revised Manuscript: January 7, 2005
Published: February 21, 2005
Citation
Zhaoliang Cao, Li Xuan, Lifa Hu, Yongjun Liu, Quanquan Mu, and Dayu Li, "Investigation of optical testing with a phase-only liquid crystal spatial light modulator," Opt. Express 13, 1059-1065 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-4-1059
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References
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