Thin Film Deployable Reflector Model For ET Gamma Ray Imaging Telescope System (ET-GRITS)

Vinson B. Huegele

doi:10.1117/12.955574

11 October 1989 Thin Film Deployable Reflector Model For ET Gamma Ray Imaging Telescope System (ET-GRITS)

Vinson B. Huegele

Proceedings Volume 1113, Reflective Optics II; (1989) https://doi.org/10.1117/12.955574
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The Marshall Space Flight Center is developing a thin film reflector for a Gamma Ray Imaging Telescope System (GRITS) using the Shuttle External Tank (ET). The concept is to install an inflatable reflector in the ET that could be transferred from the orbiter in orbit. This is a study of a scale model reflector for the ET GRITS application. The approach is to form 1/2 mil film into a spherical mirror mounted on a seven foot diameter metal ring. The ring mount is sealed and slightly evacuated to pressurize the film into shape. Several different fabrication techniques were investigated using seamed gore designs to form the reflector. Also studied was casting a film into a seamless circular sheet. The goal for this model was to achieve a one milliradian (RMS) surface curvature error over 90% of the reflector area. This curvature was measured by a laser scanning instrument.The results show how different reflector designs and fabrication techniques contribute to surface curvature and focusing errors.

Citation Download Citation

Vinson B. Huegele "Thin Film Deployable Reflector Model For ET Gamma Ray Imaging Telescope System (ET-GRITS)", Proc. SPIE 1113, Reflective Optics II, (11 October 1989); https://doi.org/10.1117/12.955574

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