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US 12,761,578 B2Granted
Light source apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorNarumasa Ito
Life of this patent
Estimating the term…
Abstract
A light source apparatus includes a first light-emitting unit and a second light-emitting unit having centers located at different positions in a first direction and a second direction orthogonal to the first direction, and a lens unit configured to condense light from the first light-emitting unit and the second light-emitting unit onto a target surface that is rotatable. Each of the first light-emitting unit and the second light-emitting unit includes a plurality of light-emitting elements arranged in the first direction. A predetermined inequality is satisfied.
Claims20
A light source apparatus comprising:
- a first light-emitting unit and a second light-emitting unit having centers located at different positions in a first direction and a second direction orthogonal to the first direction;
- and
- a lens unit configured to condense light from the first light-emitting unit and the second light-emitting unit onto a target surface that is rotatable,
- wherein each of the first light-emitting unit and the second light-emitting unit includes a plurality of light-emitting elements arranged in the first direction, and
- wherein the following inequality is satisfied:
- 0.6
- ≤
- W
- /
- T
- ≤
- 2.
- where when viewed from the first direction, T is a distance between a center of a first light-emitting element in the first light-emitting unit and a center of a second light-emitting element in the second light-emitting unit, a first straight line is a straight line passing through a first point that is a midpoint between the center of the first light-emitting element and the center of the second light-emitting element, a second point that is a rotation center of the target surface, and W is a longer one of a distance between the first straight line and a third point that is a center of an image of the first light-emitting element formed on the target surface by the lens unit, and a distance between the first straight line and a fourth point that is a center of an image of the second light-emitting element formed on the target surface by the lens unit.
10 more elements
A light source apparatus comprising:
- a first light-emitting unit and a second light-emitting unit, the first light-emitting unit and the second light-emitting unit having centers located at different positions in a first direction and a second direction orthogonal to the first direction;
- and
- a lens unit configured to condense light from the first light-emitting unit and the second light-emitting unit,
- wherein each of the first light-emitting unit and the second light-emitting unit includes a plurality of light-emitting elements arranged in the first direction, and
- wherein the following inequality is satisfied:
- 0
- .
- 1
-
- 6
- ≤
- T
- /
- D
- ≤
- 0
- .
- 3
-
- 1
- where when viewed from the first direction, T is a distance between a center of a first light-emitting element in the first light-emitting unit and a center of a second light-emitting element in the second light-emitting unit, and D is a distance from a first straight line that passes the center of a first light-emitting element and the center of the second light-emitting element and a center of an entrance surface of the lens unit.
18 more elements
A light source apparatus comprising:
- a first light-emitting unit and a second light-emitting unit disposed on a first surface of a substrate;
- and
- a lens unit configured to condense light from the first light-emitting unit and the second light-emitting unit,
- wherein the first light-emitting unit and the second light-emitting unit have centers located at different positions in a first direction and a second direction orthogonal to the first direction;
- wherein each of the first light-emitting unit and the second light-emitting unit includes a second surface, and a plurality of light-emitting elements arranged in the first direction on the second surface;
- wherein when viewed from the first direction, the second surface of at least one of the first light-emitting unit and the second light-emitting unit is tilted relative to the first surface;
- and
- wherein a light amount that is emitted from a light-emitting unit including the second surface tilted relative to the first surface, is reflected by the lens unit, is reflected by the second surface of another light-emitting unit, and enters the lens unit is less than a light amount in a case where the second surface is not tilted.
5 more elements
Dependencies are inferred from the claim text.