US 12,072,615 B2
Projection optical apparatus that is removable installed in a light emitting apparatus and projector
Hirofumi Okubo, Matsumoto (JP); Naoto Takehana, Azumino (JP); and Kosho Kamijo, Yamagata-mura (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Dec. 28, 2021, as Appl. No. 17/563,216.
Claims priority of application No. 2020-218637 (JP), filed on Dec. 28, 2020.
Prior Publication US 2022/0206242 A1, Jun. 30, 2022
Int. Cl. G03B 21/14 (2006.01); G03B 21/28 (2006.01); G02B 7/02 (2021.01); G02B 17/08 (2006.01)
CPC G03B 21/145 (2013.01) [G03B 21/28 (2013.01); G02B 7/021 (2013.01); G02B 17/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A projection optical apparatus that is removably installed in a light emitting apparatus and projects light emitted from the light emitting apparatus, the projection optical apparatus comprising:
a plurality of lenses;
a first reflector and a second reflector,
a lens barrel holding the plurality of lenses; and
a first grip extending outward from an exterior of the lens barrel,
a second grip extending outward from the exterior of the lens barrel,
wherein the first grip is removable from the lens barrel when the projection optical apparatus projects light emitted from the light emitting apparatus,
the lens barrel includes
a light incident section through which light emitted from the light emitting apparatus passes along a first optical axis,
an intermediate section through which light emitted from the light incident section and reflected off the first reflector passes along a second optical axis intersecting with the first optical axis, and
a light exiting section through which light emitted from the intermediate section and reflected off the second reflector passes along a third optical axis intersecting with the second optical axis,
the first grip and the second grip are attached to the light exiting section.