Control algorithms of liquid crystal phased arrays used as adaptive optic correctors

David Dayton; John Gonglewski; Stephen Browne

doi:10.1117/12.681655

29 August 2006 Control algorithms of liquid crystal phased arrays used as adaptive optic correctors

David Dayton, John Gonglewski, Stephen Browne

Proceedings Volume 6306, Advanced Wavefront Control: Methods, Devices, and Applications IV; 630604 (2006) https://doi.org/10.1117/12.681655
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Multi-segment liquid crystal phased arrays have been demonstrated as adaptive optics elements for correction of atmospheric turbulence. High speed dual-frequency nematic liquid crystal has sufficient bandwidth to keep up with moderate atmospheric Greenwood frequencies. However the segmented piston correction only spatial nature of the devices requires novel approaches to control algorithms especially when used with Shack-Hartmann wave front sensors. In this presentation we explore approaches and their effects on closed loop Strehl ratios. A Zernike modal based approach has produced the best results. The presentation will contain results from experiments with a Meadowlark optics liquid crystal device.

Citation Download Citation

David Dayton, John Gonglewski, and Stephen Browne "Control algorithms of liquid crystal phased arrays used as adaptive optic correctors", Proc. SPIE 6306, Advanced Wavefront Control: Methods, Devices, and Applications IV, 630604 (29 August 2006); https://doi.org/10.1117/12.681655

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available