ClassID:

164220

G01B9/02067 - CPC Classification

Classification description:

Instruments as specified in the subgroups and characterised by the use of optical measuring means; Interferometers; Reduction or prevention of errors; Testing; Calibration; Active error reduction, i.e. varying with time by electronic control systems, i.e. using feedback acting on optics or light

Sub-classes:
Recent Application in this class:
#1
20260126286
2026-05-07

LASER TRACKING INTERFEROMETRIC SPATIAL COORDINATE MEASUREMENT SYSTEM AND METHOD BASED ON DUAL ELECTRO-OPTICAL FREQUENCY COMB

#2
20260036416
2026-02-05

Distance Measuring Device and Distance Measuring Method

#3
20250369745
2025-12-04

REDUNDANT CORE IN MULTICORE OPTICAL FIBER FOR SAFETY

#4
20250369744
2025-12-04

MICROSCOPE INCLUDING INTERFEROMETER

#5
20250172379
2025-05-29

DETECTION SYSTEM, COMPENSATION METHOD, AND COMPUTER READABLE MEDIUM FOR SEMICONDUCTOR SURFACE MORPHOLOGY

#6
20250123095
2025-04-17

DYNAMIC INTERFEROMETER ILLUMINATOR

#7
20240418497
2024-12-19

Relative intensity noise Cat's-eye swept source laser for OCT and spectroscopy

#8
20240401927
2024-12-05

ABSOLUTE MEASUREMENT METHOD FOR THE PHASE OF THE COMPLEX COHERENCE COEFFICIENT

#9
20240393097
2024-11-28

THREE-DIMENSIONAL SHAPE MEASURING DEVICE, REFERENCE SURFACE POSITION ADJUSTMENT METHOD THEREFOR, AND MEASUREMENT MODE SWITCHING METHOD THEREFOR

#10
20240219168
2024-07-04

METHOD FOR TESTING AN OCT DEVICE AND TEST OBJECT

#11
20240077300
2024-03-07

METHOD OF CALIBRATING OPTICAL COHERENCE TOMOGRAPHY APPARATUS TO MEASURE DEPTH

#12
20230160682
2023-05-25

Polarization-separated, phase-shifted interferometer

#13
20210356249
2021-11-18

Integrated photonic chip with coherent receiver and variable optical delay for imaging, sensing, and ranging applications

#14
20210270595
2021-09-02

Phase cancellation microscopy

#15
20210055096
2021-02-25

Digitizer for an optical coherence tomography imager

#16
20210033381
2021-02-04

Retro-interferometer having active readjustment

#17
20200263973
2020-08-20

Phase delay extraction and compensation method in PGC phase demodulation technology

#18
20200238436
2020-07-30

Workpiece processing machine and method for processing a workpiece, in particular by welding

#19
20200208958
2020-07-02

Automatic calibration optical interferometer and automatic calibration method of optical interferometer

#20
20190346295
2019-11-14

Optical interrogator for performing interferometry using Bragg gratings

#21
20190204065
2019-07-04

Light measurement device and optical axis adjustment method

#22
20190195614
2019-06-27

Optical coherence tomographic device comprising dual correction beams of different path lengths

#23
20190099079
2019-04-04

Calibration for OCT-NIRAF multimodality probe

#24
20190049312
2019-02-14

Large range, high resolution interferometer for wide range of sensing applications

#25
20180372476
2018-12-27

Arrangement and method of determining properties of a surface and subsurface structures

#26
20180266854
2018-09-20

Optical interrogator for performing interferometry using fiber Bragg gratings

#27
20180242838
2018-08-30

Coherence-gated wavefront-sensorless adaptive-optics multi-photon microscopy, and associated systems and methods

#28
20180180401
2018-06-28

System and method for phase-readout and active stabilization of optical interferometers

#29
20180160897
2018-06-14

Ophthalmologic apparatus, and ophthalmologic imaging method

#30
20180156600
2018-06-07

AGILE IMAGING SYSTEM

#31
20180156597
2018-06-07

Scanning white-light interferometry system for characterization of patterned semiconductor features

#32
20180140183
2018-05-24

Imaging apparatus

#33
20180066932
2018-03-08

Closed-loop interferometric sensor using loop gain for determining interference contrast

#34
20180031415
2018-02-01

INTERFEROMETER SYSTEM HAVING A CONTINUOUSLY VARIABLE BROADBAND REFLECTOR AND METHOD TO GENERATE AN INTERFERENCE SIGNAL OF A SURFACE OF A SAMPLE

#35
20170307352
2017-10-26

Remote probe for optical measuring machine

#36
20170205223
2017-07-20

Agile imaging system

#37
20170115110
2017-04-27

Compact portable double differential fiber optic Sagnac interferometer

#38
20170082422
2017-03-23

Apparatus to reduce pressure and thermal sensitivity of high precision optical displacement sensors

#39
20160123719
2016-05-05

Automated re-focusing of interferometric reference mirror

#40
20160025478
2016-01-28

Real time FPGA resampling for swept source optical coherence tomography

#41
20150241201
2015-08-27

Grazing incidence interferometer

#42
20150171595
2015-06-18

System and method for stabilizing mode locked swept laser for OCT medical imaging

#43
20150049340
2015-02-19

Optical coherence tomography with an extended dynamic range

#44
20150046111
2015-02-12

Laser heterodyne interferometric signal processing method based on locking edge with high frequency digital signal

#45
20140320865
2014-10-30

Apparatus for detecting a 3D structure of an object

#46
20140268057
2014-09-18

Device for swept source optical coherence domain reflectometry

#47
20140218742
2014-08-07

Optical coherence tomography control systems and methods

#48
20140204439
2014-07-24

Fiber stabilization of optical path differences (OPD) over a wide bandwidth frequency range for extended periods of time

#49
20140185054
2014-07-03

System and method for stabilizing mode locked swept laser for OCT medical imaging

#50
20140028997
2014-01-30

Agile imaging system

#51
20130265586
2013-10-10

Interferometer with continuously varying path length measured in wavelengths to the reference mirror

#52
20130265585
2013-10-10

Systems and methods for phase measurements

#53
20130155414
2013-06-20

Measuring apparatus including multi-wavelength interferometer

#54
20130107242
2013-05-02

MEASUREMENT APPARATUS

#55
20130100458
2013-04-25

Multi-wavelength interferometer, measurement apparatus, and measurement method

#56
20130033573
2013-02-07

Optical phase extraction system having phase compensation function of closed loop type and three-dimensional image extraction method thereof

#57
20130003074
2013-01-03

Optical coherence tomographic imaging apparatus, optical coherence tomographic imaging method, program for executing the optical coherence tomographic imaging method, and storage medium having the program stored thereon

#58
20120281232
2012-11-08

Interferometric material sensing apparatus including adjustable reference arm and associated methods

#59
20120127476
2012-05-24

Process, system and software arrangement for determining at least one location in a sample using an optical coherence tomography

#60
20120116718
2012-05-10

Measurement apparatus

#61
20120057168
2012-03-08

Imaging device for optical coherence tomographic image and imaging method

#62
20120038930
2012-02-16

Fixed wavelength absolute distance interferometer

#63
20120013914
2012-01-19

Apparatus and methods for uniform frequency sample clocking

#64
20110255054
2011-10-20

Device for swept-source optical coherence domain reflectometry

#65
20110211198
2011-09-01

Lightwave interference measurement apparatus that calculates absolute distance using lightwave interference

#66
20110096293
2011-04-28

Adaptive optics apparatus and imaging apparatus including the same

#67
20110051146
2011-03-03

Interferometric distance-measuring method with delayed chirp signal and such an apparatus

#68
20100315649
2010-12-16

OCT apparatus and interference signal level control method for the same

#69
20100225924
2010-09-09

Optical interference measuring apparatus

#70
20100195112
2010-08-05

Interference microscope with scan motion detection using fringe motion in monitor patterns

#71
20100188502
2010-07-29

Optical image measurement device

#72
20100145648
2010-06-10

System and method for correcting sampling errors associated with radiation source tuning rate fluctuations in swept-wavelength interferometry

#73
20100094135
2010-04-15

Systems and methods for phase measurements

#74
20100033733
2010-02-11

Vibration-resistant interferometric scanning system and method thereof

#75
20090238222
2009-09-24

Laser system employing harmonic generation

#76
20090153873
2009-06-18

Optical image measuring apparatus

#77
20090091765
2009-04-09

Apparatus for interferometric sensing

#78
20090046295
2009-02-19

Apparatus and methods for uniform frequency sample clocking

#79
20080239238
2008-10-02

Optical image measurement device and optical image measurement method

#80
20080151260
2008-06-26

Optical image measurement device

#81
20070285670
2007-12-13

Method and apparatus for detecting defect on a surface of a specimen

#82
20070195329
2007-08-23

Holographically compensated, self-referenced interferometer

#83
20070171426
2007-07-26

Low non-linear error displacement measuring interferometer

#84
20070115478
2007-05-24

Monolithic displacement measuring interferometer with spatially separated but substantially equivalent optical pathways and optional dual beam outputs

#85
20070024859
2007-02-01

Method for determining the refractive index during interferometric length measurement and interferometric arrangement therefor

#86
20070013916
2007-01-18

Methods and systems for ultra-precise measurement and control of object motion in six degrees of freedom by projection and measurement of interference fringes

#87
20060193356
2006-08-31

Die level optical transduction systems

#88
20060094939
2006-05-04

Method and arrangement for optical coherence tomography

#89
20060039004
2006-02-23

Process, system and software arrangement for determining at least one location in a sample using an optical coherence tomography

#90
20050275846
2005-12-15

Device for measuring an optical path length difference

#91
20050231728
2005-10-20

Q-point stabilization for linear interferometric sensors using tunable diffraction grating

#92
20050225772
2005-10-13

Interferometric servo control system for stage metrology

#93
20050162662
2005-07-28

Method and device for measuring wall thickness of a pipe in a pipe-rolling mill

#94
20050105097
2005-05-19

Systems and methods for phase measurements

#95
20050057756
2005-03-17

Systems and methods for phase measurements

#96
17540500
2023-05-09

System and method of phase-locked fiber interferometry