Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Measurement of thermo-elastic deformation of an optic using a polarization-based shearing interferometer

Not Accessible

Your library or personal account may give you access

Abstract

A shearing interferometer is presented that uses polarization control to shear the wavefront and to modulate the interference pattern. The shear is generated by spatial walk-off in a birefringent crystal. By adjusting the orientation of the birefringent crystal, the components of the wavefront gradient can be independently measured to allow determination of the full wavefront vector gradient as well as reconstruction of the wavefront. Further, the monolithic nature of the crystal used for shearing allows the interferometer to be set up without need for precise alignment of any components. An algorithm incorporating homodyne detection is presented, which analyzes the modulated interferograms to determine the components of the wavefront gradient, from which the wavefront is reconstructed. The thermal deformation of a mirror subject to heating from absorption of a Gaussian pump beam was accurately observed with a sensitivity better than λ/160. We show that this sensitivity is scale invariant, and present a method to account for the nonuniform spatial frequency response of the interferometer.

© 2012 Optical Society of America

Full Article  |  PDF Article
More Like This
Integrated diffractive shearing interferometry for adaptive wavefront sensing

Jason H. Karp, Trevor K. Chan, and Joseph E. Ford
Appl. Opt. 47(35) 6666-6674 (2008)

Real-time measurement of large liquid surface deformation using a holographic shearing interferometer

K. Matsuda, S. Watanabe, and T. Eiju
Appl. Opt. 24(24) 4443-4447 (1985)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (26)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved