Refractive optics and projection display apparatus
First Claim
1. A refractive optics which forms part of a projection optics including a reflective optics having at least one reflecting mirror and which has a group of lenses, the refractive optics comprising:
- a non-circular lens which is a lens in the group of lenses provided on a side closer to the reflective optics; and
a holder which has an inner wall surface holding the non-circular lens and which has an annular cross section, whereinthe non-circular lens has an optical axis center coinciding with an optical axis center of the refractive optics, and has a non-circular shape forming part of an imaginary circular region whose center is the optical axis center of the refractive optics,the optical axis center of the non-circular lens does not coincide with a center axis of a cylinder formed by the inner wall surface, andthe projection optics further includes imager output light guide circular lenses having optical axes that coincide with the optical axis center of the refractive optics provided on a side closer to an image light generator, and the diameter of the imaginary circular region is set larger than the diameter of any of the imager output light guide circular lenses.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics.
-
Citations
9 Claims
-
1. A refractive optics which forms part of a projection optics including a reflective optics having at least one reflecting mirror and which has a group of lenses, the refractive optics comprising:
-
a non-circular lens which is a lens in the group of lenses provided on a side closer to the reflective optics; and a holder which has an inner wall surface holding the non-circular lens and which has an annular cross section, wherein the non-circular lens has an optical axis center coinciding with an optical axis center of the refractive optics, and has a non-circular shape forming part of an imaginary circular region whose center is the optical axis center of the refractive optics, the optical axis center of the non-circular lens does not coincide with a center axis of a cylinder formed by the inner wall surface, and the projection optics further includes imager output light guide circular lenses having optical axes that coincide with the optical axis center of the refractive optics provided on a side closer to an image light generator, and the diameter of the imaginary circular region is set larger than the diameter of any of the imager output light guide circular lenses. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A projection display apparatus comprising:
-
an imager; and a projection optics configured to project light outputted from the imager, wherein the projection optics includes a refractive optics and a reflective optics having at least one reflecting mirror, the refractive optics including a plurality of lenses, the refractive optics has a non-circular lens and a holder, the non-circular lens being one of the plurality of lenses provided on a side closer to the reflective optics, the holder having an annular cross section and having an inner wall surface holding the non-circular lens, the non-circular lens has an optical axis center coinciding with an optical axis center of the refractive optics, and has a non-circular shape forming part of an imaginary circular region whose center is the optical axis center of the refractive optics, the optical axis center of the non-circular lens does not coincide with a center axis of a cylinder formed by the inner wall surface, the imager is provided at a position shifted from the optical axis center of the refractive optics, and the projection optics further includes imager output light guide circular lenses having optical axes that coincide with the optical axis center of the refractive optics provided on a side closer to an image light generator, and the diameter of the imaginary circular region is set larger than the diameter of any of the imager output light guide circular lenses. - View Dependent Claims (7, 8, 9)
-
Specification