Time-domain coherence-gated Shack-Hartmann wavefront sensor

Jingyu Wang; Adrian Gh Podoleanu

doi:10.1117/12.889567

1 June 2011 Time-domain coherence-gated Shack-Hartmann wavefront sensor

Jingyu Wang, Adrian Gh Podoleanu

Proceedings Volume 8091, Optical Coherence Tomography and Coherence Techniques V; 80911L (2011) https://doi.org/10.1117/12.889567
Event: European Conferences on Biomedical Optics, 2011, Munich, Germany

Abstract

In the present paper we investigate the possibility of narrowing the depth range of a physical Shack - Hartmann wavefront sensor (SH-WFS) by using coherence gating. We have already demonstrated a low coherence interferometry (LCI) set-up, capable of generating similar spots patterns as a conventional SH-WFS and also capable of eliminating stray reflections. Here, we evaluate the accuracy of wavefront measurements using a coherence-gated (CG)/SH-WFS. This is based on a Mach-Zehnder interferometer combined with a SH-WFS, that implements time-domain (TD)-LCI acquisition. The wavefront measurement errors introduced by the non-uniform distribution of the reference power over the photo-detector array were investigated. The effect on the centroid nodes accuracy due to different numbers of phaseshifting interferometry (PSI) steps applied was also evaluated. This novel technique has the potential of providing depth resolved aberration information, which can guide better correction in adaptive optics assisted OCT and confocal imaging instruments.

Citation Download Citation

Jingyu Wang and Adrian Gh Podoleanu "Time-domain coherence-gated Shack-Hartmann wavefront sensor", Proc. SPIE 8091, Optical Coherence Tomography and Coherence Techniques V, 80911L (1 June 2011); https://doi.org/10.1117/12.889567

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