Optical article having improved heat resistance

Details Optical article having improved heat resistance Optical article having improved heat resistance

1985-05-17

1987-02-03

Swisher, Nancy

Stock material or miscellaneous articles

Composite

Of quartz or glass

428469, 428472, 428701, 428702, B32B 1500, B32B 1706, B32B 900, B32B 1504

Patent

active

046408673

ABSTRACT:
An optical article having improved heat resistance, which comprises a substrate and at least one laminated coating formed on the substrate, the laminated coating comprising a highly expansive layer having a high thermal expansion coefficient and a less expansive layer having a thermal expansion coefficient lower than that of the highly expansive layer, wherein the improvement is characterized in that a Ti coating layer or a Cr coating layer is interposed at the interface between the highly expansive layer and the less expansive layer.

REFERENCES:
patent: 4497700 (1985-02-01), Groth et al.
patent: 4510190 (1985-04-01), Glaser
patent: 4529657 (1985-07-01), Franz
patent: 4556599 (1985-12-01), Sato et al.

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