PATENT CLAIM ANALYSIS

Application Number: 15753912
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["359", "731000"]

Abstract:
A projection optical system capable of performing compact and proximate projection and a projector including the projection optical system. The projection optical system includes a first optical group which is a dioptric system and a second optical group which is a catoptric system. The second optical group includes a first catoptric system to a third catoptric system that have a first reflection surface with a concave surface shape, a second reflection surface with a curved surface shape, and a third reflection surface with a convex surface shape. The first catoptric system to the third catoptric system satisfy Conditional Expression (1) for focal distances. Image light emitted from the first optical group is reflected by the second optical group to be projected to a projection surface.

Claim (Index 1):
A projection optical system comprising:\n a dioptric system including a plurality of lenses and having positive powers and a catoptric system that are installed in order from a reduction side, wherein the catoptric system includes first, second, and third catoptric systems installed in order from a side of the dioptric system along an optical path of light emitted from the dioptric system, wherein the first catoptric system includes a first reflection surface that has a concave surface shape, wherein the second catoptric system includes a second reflection surface that has a curved surface shape, wherein the third catoptric system includes a third reflection surface that has a convex surface shape, wherein at least two of the first, second, and third reflection surfaces have an aspherical shape, and wherein when f1 is a focal distance of the first catoptric system, f2 is a focal distance of the second catoptric system, and f3 is a focal distance of the third catoptric system, f1, f2, and f3 satisfy Conditional Expression (1) below\n | f 2|>| f 3|>| f 1|\u2003\u2003(1).

Metadata:
- Claim Count in Document: 2.0
- Percentile: 88.0
- Lexical Diversity: 2.5283
- Patent Class: 359.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15580584', '15240883', '14032865', '15014464', '15014668']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8311616608638738
- 35 USC 102 Novelty (BERT): 0.5267352058067969
- Combined Prediction Score: 0.800719015358166
- Mean Citation Score: 326.33689
- Max Citation Score: 390.32578
- Similarity Product: 316.96441601122143

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