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US 12,487,444 B2Granted
Optical unit, manufacturing method for optical unit, and endoscope
AssigneeOlympus Corporation
InventorKazuya Maeda
Life of this patent
Estimating the term…
Abstract
An optical unit includes a transparent first substrate, a transparent second substrate, a transparent first projection forming a part of an optical path, and a first aperture configured by black resin filled in a periphery of the first projection between the first substrate and the second substrate.
Claims11
An optical unit comprising:
- a transparent first substrate including a first principal surface and a second principal surface on an opposite side of the first principal surface;
- a transparent second substrate including a third principal surface and a fourth principal surface on an opposite side of the third principal surface;
- a transparent first projection that defines an interval between the first principal surface and the fourth principal surface and forms a part of an optical path;
- and
- a first aperture configured by black resin filled in a space between the first principal surface and the fourth principal surface around the first projection;
- wherein an area of a cross section orthogonal to an optical axis of the first projection is 30% or less of an area of the cross section of the first substrate, and
- the optical unit comprises a plurality of poles having a same height as a height of the first projection between the first principal surface and the fourth principal surface around the first projection.
4 more elements
An optical unit comprising:
- a transparent first substrate including a first principal surface and a second principal surface on an opposite side of the first principal surface;
- a transparent second substrate including a third principal surface and a fourth principal surface on an opposite side of the third principal surface;
- a transparent first projection that defines an interval between the first principal surface and the fourth principal surface and forms a part of an optical path;
- and
- a first aperture configured by black resin filled in a space between the first principal surface and the fourth principal surface around the first projection;
- wherein the optical unit includes, in the third principal surface, a film aperture made of a metal film having an opening smaller than the aperture.
3 more elements
An optical unit comprising:
- a transparent first substrate including a first principal surface and a second principal surface on an opposite side of the first principal surface;
- a transparent second substrate including a third principal surface and a fourth principal surface on an opposite side of the third principal surface;
- a transparent first projection that defines an interval between the first principal surface and the fourth principal surface and forms a part of an optical path;
- and
- a first aperture configured by black resin filled in a space between the first principal surface and the fourth principal surface around the first projection;
- and
- a second aperture configured by black resin filled in a periphery of a second projection sandwiched by a transparent third substrate and a transparent fourth substrate, wherein
- the first aperture disposed in a position closer to an object than the second aperture is a brightness aperture, and
- the second aperture is a flare aperture.
6 more elements
Dependencies are inferred from the claim text.