Instantaneous phase mapping deflectometry for dynamic deformable mirror characterization

Isaac Trumper; Heejoo Choi

doi:10.1117/12.2272188

5 September 2017 Instantaneous phase mapping deflectometry for dynamic deformable mirror characterization

Isaac Trumper, Heejoo Choi

Proceedings Volume 10401, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems; 104010S (2017) https://doi.org/10.1117/12.2272188
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

We present an instantaneous phase mapping deflectometry (PMD) system in the context of measuring a continuous surface deformable mirror (DM). Deflectometry has a high dynamic range, enabling the full range of surfaces generated by the DM to be measured. The recent development of an instantaneous PMD system leverages the simple setup of the PMD system to measure dynamic objects with accuracy similar to an interferometer. To demonstrate the capabilities of this technology, we perform a linearity measurement of the actuator motion in a continuous surface DM, which is critical for closed loop control in adaptive optics applications. We measure the entire set of actuators across the DM as they traverse their full range of motion with a Shack-Hartman wavefront sensor, thereby obtaining the influence function. Given the influence function of each actuator, the DM can produce specific Zernike terms on its surface. We then measure the linearity of the Zernike modes available in the DM software using the instantaneous PMD system. By obtaining the relationship between modes, we can more accurately generate surface profiles composed of Zernike terms. This ability is useful for other dynamic freeform metrology applications that utilize the DM as a null component.

Conference Presentation

Citation Download Citation

Isaac Trumper and Heejoo Choi "Instantaneous phase mapping deflectometry for dynamic deformable mirror characterization", Proc. SPIE 10401, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems, 104010S (5 September 2017); https://doi.org/10.1117/12.2272188

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