Fast computer-free holographic adaptive optics

Geoff Andersen; Fassil Ghebremichael; Ravi Gaddipati; Phani Gaddipati

doi:10.1117/12.924247

13 September 2012 Fast computer-free holographic adaptive optics

Geoff Andersen, Fassil Ghebremichael, Ravi Gaddipati, Phani Gaddipati

Proceedings Volume 8447, Adaptive Optics Systems III; 84472L (2012) https://doi.org/10.1117/12.924247
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

We have constructed an adaptive optics system incorporating a holographic wavefront sensor with the autonomous closed-loop control of a MEMS deformable mirror (DM). HALOS incorporates a multiplexed holographic recording of the response functions of each actuator in a deformable mirror. On reconstruction with an arbitrary input beam, pairs of focal spots are produced. By measuring the relative intensities of these spots a full measurement of the absolute phase can be constructed. Using fast photodiodes, direct feedback correction can be applied to the actuators.

Citation Download Citation

Geoff Andersen, Fassil Ghebremichael, Ravi Gaddipati, and Phani Gaddipati "Fast computer-free holographic adaptive optics", Proc. SPIE 8447, Adaptive Optics Systems III, 84472L (13 September 2012); https://doi.org/10.1117/12.924247

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