PATENT CLAIM ANALYSIS

Application Number: 15875904
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["250", "350000"]

Abstract:
A system for covert sensing. A broadband light source is split into two portions, a first portion of which illuminates a target, and a second portion of which is frequency shifted, e.g., by an acousto-optic frequency shifter. Light reflected from the target is combined with the frequency shifted light, detected, and demodulated with an in-phase and quadrature demodulator. The outputs of the demodulator are filtered and the arc tangent of the ratio is calculated.

Claim (Index 1):
A system for measuring fine range for a target, the system comprising:\n a light source; an optical splitter, having an input, a first output and a second output, and being configured to receive, at the input, light from the light source; a transmitting aperture, connected to the first output of the splitter, the transmitting aperture being configured to radiate light, received from the first output of the splitter, in a free-space beam; a combined optical delay and frequency shifter, having:\n an optical input connected to the second output of the optical splitter, and \n an output; \n an optical combiner, having a first input, a second input, a first output, and a second output, the first input being connected to the output of the frequency shifter; a receiving aperture, configured to receive light reflected from the target and having an output connected to the second input of the optical combiner; a first photodetector having:\n an optical input configured to receive light from the first output of the optical combiner, and \n an output; and \n a control circuit connected to the first photodetector, and configured to estimate a phase of the light received by the receiving aperture relative to a phase of light radiated by the transmitting aperture.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 86.0
- Lexical Diversity: 1.68
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12754681', '16307253', '10824197', '12739842', '13920570']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7046180789239971
- 35 USC 102 Novelty (BERT): 0.4778712520536359
- Combined Prediction Score: 0.681943396236961
- Mean Citation Score: 197.005448
- Max Citation Score: 223.59743
- Similarity Product: 181.23638472876667

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

Dataset: test