Optically black coating with improved infrared absorption and pr

Details Optically black coating with improved infrared absorption and pr Optically black coating with improved infrared absorption and pr

1984-07-30

1986-05-20

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 376, 204 383, 204 42, 204 58, 126901, C25D 534, C25D 544

Patent

active

045899720

ABSTRACT:
An optically black coating with improved infrared absorption is disclosed along with a process for formation therefor. An anodizable substrate is first treated in a surface modification step prior to anodizing to produce major surface modifications at least about 100 microns in width and at least about 50 microns in depth. Preferably, the depth is at least about 1/2 the width, and the modifications are present in a random series of irregularly sized modifications having widths from about 100 microns to about 1,000 microns and depths from about 50 microns to about 750 microns. A second aspect involves the use of steam for sealing the anodized surface.

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"Preliminary Performance Data on an Improved Optical Black for Infrared Use," Pompea et al., Proc. Society of Photo-Optical Instrumentation Engineers, vol. 400, New Optical Materials (1983), 128.

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