Optical element and optical device
AssigneeKabushiki Kaisha Toshiba
InventorsHiroshi OHNO, Kazushige YAMAMOTO, Soichiro SHIBASAKI
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Abstract
An optical element of an embodiment includes an optical element made of a material transparent to light, the optical element including: a back surface facing the front surface; and a connection surface. The front surface includes a recessed surface in a region facing the connection surface. The recessed surface has a point closest to the connection surface as a closest point, and has a first singular point other than the closest point.
Claims28
An optical element made of a material transparent to light, the optical element comprising:
- a front surface;
- a back surface facing the front surface;
- and
- a connection surface,
- wherein the front surface includes a recessed surface in a region facing the connection surface, and
- the recessed surface has a point closest to the connection surface as a closest point, and
- has a first singular point other than the closest point.
An optical device comprising an optical element and a light-receiving element or a light-emitting element,
- wherein the optical element includes a front surface, back surface facing the front surface, and a connection surface, and
- wherein the front surface in a recessed surface in a region facing the connection surface,
- the recessed surface has a point closest to the connection surface as a closest point and has a first singular point other than the closest point, and
- the connection surface of the optical element is arranged to face a light-receiving surface of the light-receiving element or a light-emitting surface of the light-emitting element.
Dependencies are inferred from the claim text.