Plastic optical elements

Details Plastic optical elements Plastic optical elements

2008-07-15

2008-07-15

Nakarani, D. S. (Department: 1794)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

C428S412000, C428S451000

Reexamination Certificate

active

10859139

ABSTRACT:
The plastic optical element has such a characteristic that it will gain a mass increase of no more than 0.1 mass % upon moisture absorption when it is left to stand for 30 days in an atmosphere with a temperature of 40° C. and a relative humidity of 20% and then left to stand for an additional 30 days in an atmosphere with a temperature of 40° C. and a relative humidity of 90%. The plastic optical element includes a plastic substrate and a multi-layered film covering the plastic substrate. The multi-layered film includes a lower inorganic layer formed over the plastic substrate and an upper organic layer formed over the inorganic layer.

REFERENCES:
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patent: 5770301 (1998-06-01), Murai et al.
patent: 5783299 (1998-07-01), Miyashita et al.
patent: 6528672 (2003-03-01), Yamaguchi et al.
patent: 6582823 (2003-06-01), Sakhrani et al.
patent: 2003/0207050 (2003-11-01), Hay et al.
patent: 2002-148402 (2002-05-01), None

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