PATENT CLAIM ANALYSIS

Application Number: 16119422
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-03
Patent Classification: ["353", "101000"]

Abstract:
A projection system includes a first lens group that does not move when the projection magnification is changed with the aid of the zoom function, and the first lens group includes a correction lens group that is moved in the direction of the optical axis to correct worsened astigmatism. The projection system satisfies the following conditional expressions (1) and (2): |ΔBF20|< P ×FNO×√2  (1) 1.5<| f 1/ f|   (2) where P represents the pixel pitch in an image displayed by liquid crystal panels, FNO represents the F number of the entire lens system, ΔBF represents the amount of movement of the back focus position in a case where the correction lens group is moved by the amount of movement for correction of the aberration that changes when the temperature changes by 20° C., f represents the focal length of the entire lens system, and f1 represents the focal length of the correction lens group.

Claim (Index 3):
The projection system according to  claim 1 ,\n wherein in a case where the correction lens group is formed of one lens, following conditional expressions (4) and (5) are satisfied:\n 1.45< nd 1<1.60\u2003\u2003(4) \n 50<\u03bd d 1<85\u2003\u2003(5) \n where nd1 represents a refractive index of the lens and \u03bdd1 represents an Abbe number of the lens, and\n in a case where the correction lens group is formed of a plurality of lenses, the following conditional expressions (4) and (5) are satisfied:\n 1.45< nd 1<1.60\u2003\u2003(4) \n 50<\u03bd d 1<85\u2003\u2003(5) \n \n where nd1 represents a refractive index of a correction-lens-group last lens, which is a lens of the correction lens group and located in a position closest to the fixed lens group, and \u03bdd1 represents an Abbe number of the correction-lens-group last lens.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 96.0
- Lexical Diversity: 2.03529
- Patent Class: 353.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14456362', '14991248', '12698520', '15601606', '14288421']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7110093715021182
- 35 USC 102 Novelty (BERT): 0.512989286986481
- Combined Prediction Score: 0.6912073630505544
- Mean Citation Score: 275.75077400000004
- Max Citation Score: 290.51453
- Similarity Product: 231.7582076234901

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

Dataset: test