Self-imaging technique for focusing an IR telescope

Paul Jennison; Loris G. Gregoris; Edward J. Kristufek

doi:10.1117/12.21777

1 October 1990 Self-imaging technique for focusing an IR telescope

Paul Jennison, Loris G. Gregoris, Edward J. Kristufek

Proceedings Volume 1309, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing; (1990) https://doi.org/10.1117/12.21777
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

A method has been developed, whereby the optimum focus of an IR telescope may be determined utilizing self imaging. A set of gold-bars, located adjacent to an array of detectors within a cooled focal plane, are reimaged and scanned across the detector array. The respective spatial and temporal frequencies of the gold bars and external scan mirror are selected to maximize the response of the sensor electronics. The resulting response to this cooled periodic stimulus is Fourier transformed and stored in memory for each location of the focal plane. The optimum focus is determined to be the position where maximum power at the stimulating frequency was obtained.

Citation Download Citation

Paul Jennison, Loris G. Gregoris, and Edward J. Kristufek "Self-imaging technique for focusing an IR telescope", Proc. SPIE 1309, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing, (1 October 1990); https://doi.org/10.1117/12.21777

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