PATENT CLAIM ANALYSIS

Application Number: 15775973
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["356", "477000"]

Abstract:
An interferometer for areally measuring an optically smooth surface is presented, including means for illuminating a surface region with a plurality of discrete object waves from different directions and comprising means which, on a detector, superimpose object waves reflected at the surface onto a reference wave that is coherent with a plurality of object waves in order to form an interferogram. The interferometer is distinguished by virtue of it being configured to illuminate the surface with a plurality of object waves at the same time and produce the reference wave by way of a Fizeau beam splitter plate or a Fizeau objective, and by virtue of the interferometer including an interferometer stop that is arranged in the beam path upstream of the detector, and imaging optics, wherein the interferometer stop is situated within, or slightly outside of, the Fourier plane of the imaging optics and said interferometer stop filters the object waves reflected by the surface.

Claim (Index 1):
Interferometer for areally measuring an optically smooth surface, comprising means for illuminating a surface region, to be measured, of the surface with a plurality of object waves from different directions, and means which, on a detector, superimpose object waves reflected at the surface onto a reference wave that is coherent with a plurality of object waves in order to form an interferogram in which dimensions of the surface are imaged, the interferometer being configured to illuminate the surface with a plurality of object waves at the same time and produce the reference wave by way of a Fizeau beam splitter plate or a Fizeau objective, and thus by means of beam splitting from one of the object waves that illuminate the surface, the interferometer comprising an interferometer stop that is arranged within the beam path upstream of the detector, and imaging optics, the interferometer stop being situated within, or slightly outside of, the Fourier plane of the imaging optics and said interferometer stop filtering the object waves reflected by the surface, characterized in that the interferometer has a rigid arrangement of switchable point light sources as the illumination means, in that the interferometer is designed to illuminate the optically smooth surface, during the measurement thereof, with different samples of mutually differing object waves, each sample producing its own reference wave that is deactivated when illumination with a different sample occurs, and in that these point light sources and the interferometer stop are designed such that, for each measured value recording, just one reference wave front reaches the detector and completely illuminates said detector.

Metadata:
- Claim Count in Document: 44.0
- Percentile: 93.0
- Lexical Diversity: 2.10127
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12856723', '10838694', '11800840', '15385143', '11354534']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6807036095096706
- 35 USC 102 Novelty (BERT): 0.493593073328363
- Combined Prediction Score: 0.6619925558915398
- Mean Citation Score: 246.20876200000004
- Max Citation Score: 264.7556
- Similarity Product: 234.797998727274

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