Projection system and projector
AssigneeSeiko Epson Corporation
InventorHirotaka Yanagisawa
Life of this patent
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Abstract
A projection system includes a first optical system and a second optical system including an optical element and a reflector and disposed at the enlargement side of the first optical system. The optical element has a reflection surface, a first transmissive surface disposed at the enlargement side of the reflection surface, and a second transmissive surface disposed at the enlargement side of the first transmissive surface. The reflector is disposed at the enlargement side of the reflection surface and at the reduction side of the first transmissive surface. The reflector is disposed between the optical element and the first optical system in the direction along a first optical axis of the first optical system.
Claims20
A projection system, in which light travels from a reduction side to an enlargement side along a light traveling direction, comprising:
- a first optical system;
- and
- a second optical system including an optical element and a reflector and disposed at the enlargement side of the first optical system,
- wherein the optical element has a reflection surface, a first transmissive surface disposed at the enlargement side of the reflection surface, and a second transmissive surface disposed at the enlargement side of the first transmissive surface,
- the reflector is disposed at the enlargement side of the reflection surface and at the reduction side of the first transmissive surface,
- the reflector is disposed between the optical element and the first optical system in a direction along a first optical axis of the first optical system, and
- the reflector is a flat mirror that is perpendicular to a second optical axis of the reflection surface.
A projection system, in which light travels from a reduction side to an enlargement side along a light traveling direction, comprising:
- a first optical system;
- and
- a second optical system including an optical element and a reflector and disposed at the enlargement side of the first optical system,
- wherein the optical element has a light-incident-side transmissive surface, a reflection surface disposed at the enlargement side of the light-incident-side transmissive surface, a first transmissive surface disposed at the enlargement side of the reflection surface, and a second transmissive surface disposed at the enlargement side of the first transmissive surface,
- the reflector is disposed at the enlargement side of the reflection surface and at the reduction side of the first transmissive surface,
- light passing through the light-incident-side transmissive surface and reflected by the reflection surface is incident on the light-incident-side transmissive surface again and travels toward the reflector,
- the reflector is disposed between the optical element and the first optical system in a direction along a first optical axis of the first optical system, and
- the reflector is a flat mirror that is perpendicular to a second optical axis of the reflection surface.
Dependencies are inferred from the claim text.