PATENT CLAIM ANALYSIS

Application Number: 16129164
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-01
Patent Classification: ["359", "649000"]

Abstract:
A projection optical system is constituted by, in order from the reduction side, a first optical system constituted by a plurality of lenses for forming an image displayed by image display elements as an intermediate image, and a second optical system constituted by a plurality of lenses for forming the intermediate image on a magnification side conjugate plane. Conditional Formula (1), being that 0.020<enP/TL2<0.160, is satisfied, wherein enP is the distance along the optical axis from the surface most toward the magnification side in the second optical system to the position of an entrance pupil in the case that the magnification side is a light entry side, and TL2 is the distance along the optical axis from the surface most toward the reduction side in the second optical system to the surface most toward the magnification side in the second optical system.

Claim (Index 1):
A projection optical system that projects images displayed by image display elements provided on a reduction side conjugate plane onto a magnification side conjugate plane as a magnified image, consisting of, in order from the reduction side to the magnification side:\n a first optical system constituted by a plurality of lenses that forms the image displayed by the image display elements as an intermediate image; and a second optical system constituted by a plurality of lenses that focuses the intermediate image on the magnification side conjugate plane; and the first optical system and the second optical system have a common optical axis; the intermediate image is configured such that the peripheral portion has more field curvature toward the first optical system than the portion thereof at the center of the optical axis; the surface most toward the magnification side in the first optical system is a concave surface; the surface most toward the reduction side in the second optical system is a convex surface; and the projection optical system has a full angle of view equal to 135\u00b0 or greater; in which Conditional Formulae (2) and (4-1a) below being satisfied:\n 0.125< Im\u03c6/TL 2<0.240\u2003\u2003(2) \n 5.0< Bf/|f|\u2264 13.45\u2003\u2003(4-1a) \n wherein Im\u03c6 is the effective image diameter at the reduction side, TL2 is the distance along the optical axis from the surface most toward the reduction side in the second optical system to the surface most toward the magnification side in the second optical system, Bf is the back focus of the entire optical system, and f is the focal length of the entire optical system.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 97.0
- Lexical Diversity: 2.49206
- Patent Class: 359.0
- Transitional Phrase Type: closed
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15042631', '14996601', '15044531', '15045570', '15013346']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9067778220662966
- 35 USC 102 Novelty (BERT): 0.5719102419488172
- Combined Prediction Score: 0.8732910640545487
- Mean Citation Score: 496.936024
- Max Citation Score: 505.79755
- Similarity Product: 440.78942806574105

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test