Patent ID: 11892764
Assignee: SEIKO EPSON CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. 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.