Mr. James E. Heber Profile

James E. Heber

Consultant at LA Gauge Co

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Proceedings Article | 12 December 2003 Paper

Characterization of AlBeMet 162 as an optical substrate material

James Heber, Thomas Parsonage

Proceedings Volume 5179, (2003) https://doi.org/10.1117/12.506539

KEYWORDS: Mirrors, Nickel, Optics manufacturing, Plating, Temperature metrology, Head, Thermography, Manufacturing, Beryllium, Surface finishing

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The use and manufacturing of AlBeMet 162 material as an optical substrate for head mirrors, night vision systems and fire control optics is discussed. The paper discusses the validation AlBeMet 162's thermal stability over the military environmental temperature range of -40F to +140F. The paper will discuss the manufacturing processing to yield dimensional stable optics in AlBeMet material. It will also discuss the results of interferometric testing on 150 mm diameter flats produced by 3 separate optical fabrication companies. Demonstrating the ability of the process and material to produce optical mirrors over temperature with thermal distortions of less than 0.25 wavelengths P-V. The paper will show interfermetrically that AlBeMet and nickel have an excellent coefficient of thermal expansion match over the temperature range of interest, so that there is no bi-metallic issue or distortion due to the electroless nickel. The paper will also discuss the continuing characterization program with the initial results from testing a light weighted substrates with a spherical surface.

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