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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 4 — Feb. 16, 2009
  • pp: 2530–2537

Preliminary use of nematic liquid crystal adaptive optics with a 2.16-meter reflecting telescope

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

Optics Express, Vol. 17, Issue 4, pp. 2530-2537 (2009)

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A nematic liquid crystal adaptive optics system (NLC AOS) was assembled for a 2.16-m telescope to correct for atmospheric turbulence. LC AOS was designed and optimized with Zemax optical software. Second, an adaptive correction experiment was performed in the laboratory to test the performance of the NLC AOS. After the correction, the peak to valley (PV) and root mean square (RMS) of the wavefront were down to 0.2 λ (λ=633 nm) and 0.05 λ, respectively. Finally, the star of Pollux (β Gem) was tracked using the 2.16-m Reflecting Telescope, and real time correction of the atmospheric turbulence was performed with the NLC AOS. After the adaptive correction, the average PV and RMS of the wavefront were reduced from 11 λ and 2.5 λ to 2.3 λ and 0.6 λ, respectively. Although the intensity distribution of the β Gem was converged and its peak was sharp, a halo still existed around the peak. These results indicated that the NLC AOS only partially corrected the vertical atmospheric turbulence. The limitations of our NLC AOS are discussed and some proposals are made.

© 2009 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(110.6770) Imaging systems : Telescopes
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Adaptive Optics

Original Manuscript: December 8, 2008
Revised Manuscript: January 13, 2009
Manuscript Accepted: January 21, 2009
Published: February 6, 2009

Zhaoliang Cao, Quanquan Mu, Lifa Hu, Dayu Li, Zenghui Peng, Yonggang Liu, and Li Xuan, "Preliminary use of nematic liquid crystal adaptive optics with a 2.16-meter reflecting telescope," Opt. Express 17, 2530-2537 (2009)

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