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Proceedings Paper

Fabricated Lightweight Metal Optic Substrates
Author(s): Larry A. Grant
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Paper Abstract

Recently, by combining brazing technology with lightweight beryllium detail components, ultra-lightweight beryllium optic substrates have become available to the designer. Two basic approaches are discussed, in the paper which includes an "eggcrated" core technique where thin. beryllium sheet products are "photo-etched" into an eggcrated pattern. and metallurgically brazed to face plates. Details of core configuration, fabrication, brazing and tolerances that can be achieved, will be discussed. Actual hardware will be reviewed from 4" to 19" assemblies. Other applications involving machined. beryllium halves will be discussed. Various techniques of metal removal yielding an overall bulk density from 33% to 5%. Joining techniques to close out the hollowed. substrate are discussed. Applications from 6" to 36" diameter optics will be reviewed. Non-destructive inspection. techniques and extrapolations to larger substrHtes of both types of designs will be reviewed.

Paper Details

Date Published: 4 May 1978
PDF: 7 pages
Proc. SPIE 0131, Practical Infrared Optics, (4 May 1978); doi: 10.1117/12.956045
Show Author Affiliations
Larry A. Grant, Electratusion Corporation (United States)

Published in SPIE Proceedings Vol. 0131:
Practical Infrared Optics
Jerrold Zimmerman; George Speake, Editor(s)

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