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US 10,760,768 B2Granted
Optical device and illumination device
AssigneeNichia Corporation
InventorsWataru Kitahara, Yoshinori Momose, Wataru Ogura
Life of this patent
Estimating the term…
Abstract
An optical device comprises: at least one first reflecting surface disposed so as to reflect first light that has a light distribution having an optical axis parallel to a first axis, to an arc-shaped first region surrounding the first axis; and a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.
Claims21
An optical device comprising:
- at least one first reflecting surface disposed so as to reflect at least a part of first light to an arc-shaped first region surrounding a first axis, the first light having a light distribution with an optical axis parallel to the first axis;
- and
- a second reflecting surface and a third reflecting surface that are disposed such that the second reflecting surface and the third reflecting surface meet each other on the first axis, and such that the at least one first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.
An optical device comprising:
- an optical element having a substantially sector shape in a plan view and including an opening at one end of a first axis perpendicular to the plane and a plurality of first reflecting surfaces;
- and
- second and third reflecting surfaces disposed so as to meet each other at the first axis, such that the optical element is disposed between the second and third reflecting surfaces,
- wherein the optical element comprises:
- a first transmitting surface, a second transmitting surface, and a third transmitting surface having sector-shapes with coaxial arcs in order from a side opposite to the opining, wherein the first transmitting surface, the second transmitting surface, and the third transmitting surface are intermittently arranged in a direction along the first axis such that an inner diameter of the optical element increases stepwise toward the opening from the side opposite to the opening, and
- the plurality of first reflecting surfaces include a fourth reflecting surface, a fifth reflecting surface, and a sixth reflecting surface, each being arc-shaped and being disposed on the side opposite to the opining and inclined at an acute angle from the first transmitting surface, the second transmitting surface, and the third transmitting surface, respectively.
3 more elements
An optical device comprising:
- at least one first reflecting surface that is disposed in an arc-shaped first region at a peripheral portion around a first axis and configured to reflect at least a part of light having an optical axis parallel to the first axis in a direction orthogonal to the first axis;
- and
- a second reflecting surface and a third reflecting surface that are disposed so as to meet each other at the first axis, such that the at least one first reflecting surface is disposed between the second reflecting surface and the third reflecting surface.
An optical element comprising:
- a substantially sector shape in a plan view;
- an opening provided at one end of a first axis perpendicular to a plane having the substantially sector shape;
- a first surface, a second surface, and a third surface for transmitting that have sector-shapes with coaxial arcs, wherein the first surface, the second surface, and the third surface are intermittently disposed along the first axis, and disposed stepwise toward the opening from a side opposite to the opening;
- and
- a fourth surface, a fifth surface, and a sixth surface for reflecting that are arc-shaped and are disposed on the side opposite to the opening such that the forth surface, the fifth surface, and the sixth surface are inclined at an acute angle from the first surface, the second surface, and the third surface, respectively.
2 more elements
Dependencies are inferred from the claim text.