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US 10,120,107 B2Granted
Optical element and method for producing optical element
AssigneeCanon Kabushiki Kaisha
InventorsKeiko Abe, Tomonari Nakayama
Life of this patent
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Abstract
An optical element having a substrate and a light-shielding film on part of an outer portion of the substrate further contains a coating on the light-shielding film, the coating containing a cured mixture of a melamine or benzoguanamine resin, and a phenolic resin, in proportions by mass of 1:5 to 7:5.
Claims10
An optical element comprising:
- a substrate;
- a light-shielding film on part of an outer portion of the substrate;
- and
- a coating on the light-shielding film,
- wherein the light-shielding film contains a coloring agent, an epoxy resin, and inorganic fine particles having a refractive index of 2.2 or more, and
- wherein the coating contains a cured mixture of melamine or benzoguanamine resin, and a phenolic resin, in proportions by mass of 1:5 to 7:5, a content of the melamine or benzoguanamine resin is 20.0% by mass or more and 60.0% by mass or less when the coating is 100% by mass.
3 more elements
Dependencies are inferred from the claim text.