9 August 1979 Method Of Obtaining A Parabolic Reflecting Surface From Thin Float Glass Plate And Its Application To The LAMAR X-Ray Telescope
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Proceedings Volume 0184, Space Optics Imaging X-Ray Optics Workshop; (1979) https://doi.org/10.1117/12.957438
Event: 1979 Huntsville Technical Symposium, 1979, Huntsville, United States
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.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. W. C. Huang, R. E. Cabral, R. E. Brissette, "Method Of Obtaining A Parabolic Reflecting Surface From Thin Float Glass Plate And Its Application To The LAMAR X-Ray Telescope", Proc. SPIE 0184, Space Optics Imaging X-Ray Optics Workshop, (9 August 1979); doi: 10.1117/12.957438; https://doi.org/10.1117/12.957438
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