PATENT CLAIM ANALYSIS

Application Number: 15942135
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-01
Patent Classification: ["250", "231130"]

Abstract:
An optical encoder configuration comprises a scale, an illumination source, and a photodetector configuration. The illumination source is configured to output structured illumination to the scale. The scale extends along a measuring axis direction and is configured to output scale light that forms a detector fringe pattern comprising periodic high and low intensity bands that extend over a relatively longer dimension along the measuring axis direction and are relatively narrow and periodic along a detected fringe motion direction transverse to the measuring axis direction. The high and low intensity bands move along the detected fringe motion direction transverse to the measuring axis direction as the scale grating displaces along the measuring axis direction. The photodetector configuration is configured to detect a displacement of the high and low intensity bands along the detected fringe motion direction and provide respective spatial phase displacement signals that are indicative of the scale displacement.

Claim (Index 4):
The contamination and defect resistant optical encoder configuration of  claim 1 , wherein:\n the structured illumination generating portion comprises:\n a first illumination source light diffraction grating comprising first illumination source grating bars arranged periodically at a first index pitch P 1  in a first index plane, wherein the first index grating bars are narrow along the measuring axis direction, and elongated along a first grating bar direction which is transverse to the measuring axis direction and rotated by an angle \u03c8 1  with respect to the readhead plane RHP; and \n a second illumination source light diffraction grating comprising second illumination source grating bars arranged periodically at a second index pitch P 2  in a second index plane which is parallel to the first index plane, wherein the second index grating bars are narrow along the measuring axis direction, and elongated along a second index grating bar direction which is transverse to the measuring axis direction and rotated by an angle \u03c8 2  with respect to the readhead plane RHP.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 90.0
- Lexical Diversity: 2.55738
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15858218', '15702520', '15637750', '13730790', '13787742']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7495588737113097
- 35 USC 102 Novelty (BERT): 0.6595137066391624
- Combined Prediction Score: 0.740554357004095
- Mean Citation Score: 498.19403
- Max Citation Score: 695.4377400000003
- Similarity Product: 606.0046115127684

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