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US 4,056,649 AGranted
Abrasion resistant optical materials and process for making same
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsJohn J. Walls, Jr., Richard A. McKyton
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Abstract
An abrasion resistant optical composite comprising a plastic substrate having a chromium layer and a glass layer sequentially deposited thereover.
Claims4
Optical composite comprising
- an allyl diglycol carbonate substrate, a chromium interlayer of about 50-200A in thickness bonded on said substrate, and a glass layer of about 3.5 .mu.m in thickness, comprising substantially SiO.sub.2, bonded on said chromium interlayer.
Process for forming
- an optical composite comprising,
- depositing a chromium coating of about 50-200A in thickness upon an allyl diglycol carbonate substrate, and depositing a glass layer of about 3.25 .mu.m in thickness, composed substantially of SiO.sub.2, over said chromium coating.
Dependencies are inferred from the claim text.