Plastic mirrors having enhanced thermal stability

Details Plastic mirrors having enhanced thermal stability Plastic mirrors having enhanced thermal stability

1996-07-02

1999-01-26

Spyrou, Cassandra

Optical: systems and elements

Mirror

With support

359884, 359885, G02B 508, G02B 7182, G02B 526, G02B 522

Patent

active

058644342

ABSTRACT:
A mirror having improved resistance to heat distortion and loss of dimensional stability when exposed to heat radiation . The mirror has a substrate of glass or plastic having front and back surfaces which can be of similar or different shape , and is coated with similar or dissimilar low-emissivity reflected layers on both surfaces. Radiation is reflected by the back surface (away from the mirror) thereby reducing amount of energy which is absorbed at the back surface of the mirror. This equalizes the temperature through the mirror and reduces thermally included warping of the mirror.

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patent: 4214818 (1980-07-01), Choyke et al.
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patent: 4364637 (1982-12-01), Ohno et al.
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patent: 4471999 (1984-09-01), Brown
patent: 4856887 (1989-08-01), Wakugawa et al.
patent: 4915494 (1990-04-01), Shipley et al.

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