The Effects Of Rigid Body Motion In Interferometric Tests Of Large-Aperture, Off-Axis, Aspheric Optics

Eric W. Young; Gregory C. Dente

doi:10.1117/12.976092

20 November 1985 The Effects Of Rigid Body Motion In Interferometric Tests Of Large-Aperture, Off-Axis, Aspheric Optics

Eric W. Young, Gregory C. Dente

Proceedings Volume 0540, Southwest Conf on Optics '85; (1985) https://doi.org/10.1117/12.976092
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States

Abstract

We present a simple, general approach for ascertaining the aberrations due to rigid body motions that are encountered in optical tests. The expressions used are generally applicable to the displacement of an aspheric optic, relative to the aligned position. However, we apply these expressions to two cases of particular interest in interferometric testing. In the first case, the optic is tested in autocollimation at its focal point. We derive an equation for the wavefront aberrations induced by a small displacement from this focal position. Next we calculate the sensitivity to motion in a center-of-curvature test using nulling optics. We obtain the aberration function for a displacement of the test element from an aligned position. For each case, we analyze the sensitivities to the various degrees of freedom for particular off-axis aspheres of interest. In all such testing situations, in particular for high-precision work, displacements are present to some degree. The key requirement is then to remove the induced errors. We develop an optimum procedure for such removal and we give some example calculations. This procedure allows the metrologist to unambiguously identify surface correction profiles needed in the fabrication of precision, off-axis, aspheric segments.

Citation Download Citation

Eric W. Young and Gregory C. Dente "The Effects Of Rigid Body Motion In Interferometric Tests Of Large-Aperture, Off-Axis, Aspheric Optics", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); https://doi.org/10.1117/12.976092

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