Optical part
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United States of America Patent
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Jun 10, 1997
Issued Date -
N/A
app pub date -
Dec 17, 1991
filing date -
Jul 19, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The optical parts according to the invention have a feature of having smoothly coated surfaces for incident and emergent lights covered thereover with a light transmitting solid coating layer, and can be manufactured by a simplified process at least without needing polishing, together with the advantages of being weatherproof in atmosphere of high temperature and high humidity and antiozonant.
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