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Proceedings Paper

Method Of Obtaining A Parabolic Reflecting Surface From Thin Float Glass Plate And Its Application To The LAMAR X-Ray Telescope
Author(s): E. W. C. Huang; R. E. Cabral; R. E. Brissette
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Paper Abstract

A method of obtaining a parabolic reflecting surface from thin float glass plate is presented including design, analysis, and hardware test results. By applying predetermined moments to each end uniformly along the leading and trailing edges, and controlling the relative end displacement, precise focussing mirrors can be produced inexpensively. The present method is an improvement to the Underwood method to bend a glass strip into a parabolic optical element. Better results are obtained by including the relative end displacement in addition to the two moments in the slope error minimization. Comparison of the results between the improved method and Underwood's are provided. This method has been used to bend a flat plate, with a width comparable to the length, into a parabolic surface. A finite element model based on plate theory is employed to examine the anticlastic effect of a bending plate and the non-uniformity of the applied moments. The design and construction of prototype Kirkpatrick-Baez mirror elements from commercial float glass are described in detail. Correlation of the image resolution between the analytic prediction and the test results is provided. The test results indicate that a mirror system with angular resolution less than one arcminute can be obtained. This method allows production of low cost mirror modules for the LAMAR X-Ray Telescope with improved resolution compared to prior methods.

Paper Details

Date Published: 9 August 1979
PDF: 10 pages
Proc. SPIE 0184, Space Optics Imaging X-Ray Optics Workshop, (9 August 1979); doi: 10.1117/12.957438
Show Author Affiliations
E. W. C. Huang, American Science and Engineering, Inc. (United States)
R. E. Cabral, American Science and Engineering, Inc. (United States)
R. E. Brissette, American Science and Engineering, Inc. (United States)


Published in SPIE Proceedings Vol. 0184:
Space Optics Imaging X-Ray Optics Workshop
Martin C. Weisskopf, Editor(s)

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