Share Email Print

Proceedings Paper

X-ray Telescope Module for the LAMAR Space Shuttle Experiment
Author(s): P. Gorenstein; L. Cohen; D. Fabricant
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The first of eight x-ray telescopes is under construction for the LAMAR experiment. Each consists of two orthogonal sets of nested confocal one-dimensional parabolic plates. The reflectors are made from gold-coated float glass, selected for flatness from commercial stock. Each is initially bent to a cylinder by bonding a thin, highly curved titanium sheet to its inactive surface. The final parabolic figure is produced by an automated system that operates under the control of an IBM XT microcomputer. The system includes seven diode arrays that detect a visible light line image. Eight precise motorized linear translators operating under the control of the computer, tune the plate to the optimum figure. The plate is then fixed in position by epoxy bonds. The precision of the system is several seconds of arc, but the intrinsic flatness of the glass is expected to limit the half-power diameter (HPD) of the telescope to about 25 arcseconds. A prototype mirror made last year, with a less sophisticated system and with one-third the full number of plates not screened as stringently as our current stock, achieved a resolution of 35 arcseconds HPD. The new automated system will facilitate rapid, relatively low-cost production of mirror modules. It is applicable to the construction of larger mirror assemblies such as XMM with little increase in cost and complexity.

Paper Details

Date Published: 14 July 1986
PDF: 7 pages
Proc. SPIE 0597, X-Ray Instrumentation in Astronomy, (14 July 1986); doi: 10.1117/12.966570
Show Author Affiliations
P. Gorenstein, Harvard-Smithsonian Center for Astrophysics (United States)
L. Cohen, Harvard-Smithsonian Center for Astrophysics (United States)
D. Fabricant, Harvard-Smithsonian Center for Astrophysics (United States)

Published in SPIE Proceedings Vol. 0597:
X-Ray Instrumentation in Astronomy
J. Leonard Culhane, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?