Method of forming film of lens and fresnel lens
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorTAKAYUKI ABE
Life of this patent
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Abstract
A Fresnel lens includes a Fresnel lens body, grooves formed on the lens surface of the Fresnel lens body and having bottom surfaces and inclined surfaces and a light absorber formed over the inclined surfaces and the bottom surfaces in which a contact angle at an end portion of the light absorber with respect to the bottom surface is larger than 70 degrees is used. A method of forming a film of a lens includes coating inclined portions of a plurality of grooves formed on a lens surface with ink, fixing the ink and removing unnecessary portions of the ink by laser.
Claims11
A Fresnel lens comprising:
- a Fresnel lens body;
- grooves formed on a lens surface of the Fresnel lens body and having bottom surfaces and inclined surfaces;
- and
- a light absorber formed over the inclined surfaces and the bottom surfaces,
- wherein a contact angle at an end portion of the light absorber with respect to the bottom surface is larger than 70 degrees.
A Fresnel lens comprising:
- a Fresnel lens body;
- grooves formed on a lens surface of the Fresnel lens body and having bottom surfaces and inclined surfaces;
- and
- a light absorber formed over the inclined surfaces and the bottom surfaces,
- wherein a layer having a thinner thickness than thicknesses of other parts is provided at an end portion of the light absorber.
A Fresnel lens comprising:
- a Fresnel lens body;
- grooves formed on a lens surface of the Fresnel lens body and having bottom surfaces and inclined surfaces;
- and
- a light absorber formed over the inclined surfaces and the bottom surfaces,
- wherein an end portion of the light absorber is a line having one or more flection points or a curve formed of an aggregation of points.
A method of forming a film of a lens comprising:
- coating inclined portions of a plurality of grooves formed on a lens surface with ink;
- fixing the ink;
- and
- removing unnecessary portions of the ink by laser.
Dependencies are inferred from the claim text.