Phase-shifting interferometry with a reflective diffraction grating for adaptive optics

F. Garoi; Petre C. Logofatu; D. Apostol; C. Udrea

doi:10.1117/12.966844

1 November 2012 Phase-shifting interferometry with a reflective diffraction grating for adaptive optics

F. Garoi, Petre C. Logofatu, D. Apostol, C. Udrea

Proceedings Volume 8411, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VI; 84110R (2012) https://doi.org/10.1117/12.966844
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2012, 2012, Constanta, Romania

Abstract

A phase-shifting interferometry method to measure the wavefront reflected from a deformable mirror is described. Usually, an adaptive optics system encompasses a deformable mirror and a Shack-Hartmann wavefront sensor as the main components. However, an interferometric method is suited for calibration and traceability purposes of such measurements. In this regard, we developed a system able to characterize the wavefront in situ with both a Shack- Hartmann sensor and a phase-shifting interferometer. The method encompasses a reflective diffraction grating, where the plus-first diffraction order reflected off the grating was incident on a deformable mirror. This beam was then reflected back to the grating where it interfered with the incident beam and the interference pattern was collected on the minusfirst order. As with the four-step phase-shifting interferometry method, four interference patterns were recorded and processed to extract the wavefront information. The wavefront sensor recorded the wavefront directly reflected from the deformable mirror, via a beam splitter.

Citation Download Citation

F. Garoi, Petre C. Logofatu, D. Apostol, and C. Udrea "Phase-shifting interferometry with a reflective diffraction grating for adaptive optics", Proc. SPIE 8411, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VI, 84110R (1 November 2012); https://doi.org/10.1117/12.966844

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