PATENT CLAIM ANALYSIS

Application Number: 15954156
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["353", "081000"]

Abstract:
Provided is a projection optical system that is a monofocal lens or a zoom lens that includes a first and a second optical system. The second optical system forms an intermediate image and the first optical system enlarges and projects the intermediate image. The first optical system includes a first-A optical system and a first-B optical system and includes a reflecting optical element. In response to the monofocal lens or the zoom lens, conditional formulas (1) and (2) are satisfied in an infinity in-focus state, 0.18<Ta/Tw<0.4 . . . (1), 1<fa/|fw|<15 . . . (2). In the conditional formulas (1) and (2), Ta is an on-axis distance in the first-A optical system, Tw is an on-axis distance in the projection optical system, fa is a focal length of the first-A optical system, and fw is a focal length of an entirety of the projection optical system.

Claim (Index 1):
A projection optical system that enlarges and projects an image displayed on an image display surface, wherein the projection optical system is a monofocal lens or a zoom lens and comprises:\n a first optical system and a second optical system in order from an enlargement side, wherein the second optical system forms an intermediate image of the image in between the first optical system and the second optical system, the first optical system enlarges and projects the intermediate image, the first optical system comprises a first-A optical system and a first-B optical system in order from the enlargement side and comprises a reflecting optical element for bending a light path between the first-A optical system and the first-B optical system, in response to the monofocal lens, conditional formulas (1) and (2) are satisfied in an infinity in-focus state, and in response to the zoom lens, conditional formulas (1) and (2) are satisfied in an infinity in-focus state in a shortest focal length state;\n 0.18< Ta/Tw< 0.4\u2003\u2003(1) \n 1< fa/|fw|< 15\u2003\u2003(2) \n wherein, Ta is an on-axis distance from a lens surface closest to an enlargement side to a lens surface closest to a reduction side in the first-A optical system, Tw is an on-axis distance from a lens surface closest to the enlargement side to a lens surface closest to the reduction side in the projection optical system, fa is a focal length of the first-A optical system, and fw is a focal length of an entirety of the projection optical system.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 91.0
- Lexical Diversity: 2.96667
- Patent Class: 353.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15353437', '15265468', '15827228', '15391941', '14610227']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.742759672504727
- 35 USC 102 Novelty (BERT): 0.5051492932306803
- Combined Prediction Score: 0.7189986345773223
- Mean Citation Score: 262.364324
- Max Citation Score: 273.25214
- Similarity Product: 200.58647611913204

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

Dataset: test