Protective layers for optical coatings

Details Protective layers for optical coatings Protective layers for optical coatings

2011-02-08

2011-02-08

Turner, Archene (Department: 1784)

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

C359S585000, C428S216000, C428S336000, C428S432000, C428S433000, C428S472000, C428S698000, C428S701000, C428S702000, C428S704000

Reexamination Certificate

active

07883776

ABSTRACT:
An optical coating on a transparent substrate is provided with a temporary layer of carbon as protection during manufacturing against scratches and corrosive environments. When the optical coating and/or substrate are tempered in an atmosphere reactive to carbon, such as air, the layer of carbon is removed as a carbon-containing gas. For an optical coating with a brittle, glassy, outermost layer furthest from the substrate, additional protection is provided by a scratch propagation blocker layer between the outermost layer and the carbon protective layer.

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