PATENT CLAIM ANALYSIS

Application Number: 16270164
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["353", "098000"]

Abstract:
An optical system includes a reflective optical system on a magnification side along an optical path of the projection optical system and a refractive optical system on a reduction side along the optical path. The reflective optical system includes one reflective optical element having a power. The refractive optical system includes a front group on the magnification side and a rear group on the reduction side. The front group having, in order from the magnification side toward the reduction side, a first lens group with a positive or negative refractive power, a second lens group, and a third lens group with a positive refractive power. The rear group has a positive refractive power. The first lens group moves to the magnification side, and the second lens group and the third lens group move to the reduction side in a change in focus from a long distance to a short distance.

Claim (Index 7):
A projection optical system, comprising:\n a reflective optical system on a magnification side along an optical path of the projection optical system, the reflective optical system including at least one reflective optical element having a power; and a refractive optical system on a reduction side along the optical path, the refractive optical system including:\n a front group on the magnification side; and \n a rear group on the reduction side having a positive refractive power, \n wherein the front group includes three focusing lens groups that move to at least one of the magnification side and the reduction side in a change in focus from a long distance to a short distance, the three focusing lens groups include a first focusing lens group closest to the magnification side, a second focusing lens group, and a third focusing lens group third closest to the magnification side, a distance between the first focusing lens group and the third focusing lens varies in the change in focus from the long distance to the short distance, and the rear group of the refractive optical system is fixed during the change in focus.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 99.0
- Lexical Diversity: 3.28571
- Patent Class: 353.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15822036', '15230816', '15170159', '14488720', '14488838']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6984619197107438
- 35 USC 102 Novelty (BERT): 0.5804942077928545
- Combined Prediction Score: 0.6866651485189549
- Mean Citation Score: 356.24082400000015
- Max Citation Score: 472.3998
- Similarity Product: 425.6731148991109

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