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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 8 — Mar. 10, 2008
  • pp: 1020–1024

Achromatic system for a twisted alignment liquid crystal wavefront corrector

Zhaoliang Cao, Quanquan Mu, Lifa Hu, Yonggang Liu, Zenghui Peng, Xinghai Lu, and Li Xuan  »View Author Affiliations


Applied Optics, Vol. 47, Issue 8, pp. 1020-1024 (2008)
http://dx.doi.org/10.1364/AO.47.001020


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Abstract

A twisted nematic liquid crystal wavefront corrector (TN-LCWFC) partially modulates the incident polarized light. A blazed grating may be preapplied on the TN-LCWFC to filter the unmodulated light for the purpose of stable adaptive correction. However, for broadband light, the dispersion of the blazed grating affects the image resolution. An achromatic method is presented to eliminate the dispersion of the blazed grating. Based on a prism model, we analyze the achromatic principle. An achromatic system with a conjugated blazed grating and an achromatic lens is given to eliminate the dispersion. An experiment was done with two transmitted blazed gratings so as to validate our method. Finally, a liquid crystal spatial light modulator was used as a conjugated grating to eliminate the dispersion of the blazed grating in an adaptive optics system. The results showed that the dispersion was partially compensated, and a resolvable image was achieved with a 600 700 nm wave band.

© 2008 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(220.1000) Optical design and fabrication : Aberration compensation
(230.3720) Optical devices : Liquid-crystal devices
(230.6120) Optical devices : Spatial light modulators

ToC Category:
Optical Devices

History
Original Manuscript: November 9, 2007
Revised Manuscript: January 10, 2008
Manuscript Accepted: January 13, 2008
Published: March 4, 2008

Citation
Zhaoliang Cao, Quanquan Mu, Lifa Hu, Yonggang Liu, Zenghui Peng, Xinghai Lu, and Li Xuan, "Achromatic system for a twisted alignment liquid crystal wavefront corrector," Appl. Opt. 47, 1020-1024 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-8-1020


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References

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