ClassID:

164179

G01B9/02018 - CPC Classification

Classification description:

Instruments as specified in the subgroups and characterised by the use of optical measuring means; Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations Multipass interferometers, e.g. double-pass

Recent Application in this class:
#1
20250264321
2025-08-21

NANOMETROLOGY DEVICE

#2
20240255320
2024-08-01

OPTICAL FIBER SENSOR AND MEASURING SYSTEM USING THE SAME

#3
20240011762
2024-01-11

Compact dual pass interferometer for a plane mirror interferometer

#4
20230288185
2023-09-14

OPTICAL INTERFERENCE RANGE SENSOR

#5
20210080244
2021-03-18

Measuring assembly for the frequency-based determination of the position of a component

#6
20190331932
2019-10-31

Methods and apparatus for high resolution imaging with reflectors at staggered depths beneath sample

#7
20190162519
2019-05-30

PHOTODETECTOR

#8
20190094012
2019-03-28

Inspecting a multilayer sample

#9
20190011248
2019-01-10

Displacement detecting device with controlled heat generation

#10
20180364594
2018-12-20

Position measurement system and lithographic apparatus

#11
20180364025
2018-12-20

Balanced detection systems

#12
20180188016
2018-07-05

Method for defect inspection of transparent substrate by integrating interference and wavefront recording to reconstruct defect complex images information

#13
20180113321
2018-04-26

Methods and apparatus for high resolution imaging with reflectors at staggered depths beneath sample

#14
20180106590
2018-04-19

Three-dimensional measurement device

#15
20180052049
2018-02-22

Mirror plate for a fabry-perot interferometer and a fabry-perot interferometer

#16
20170052462
2017-02-23

Measurement apparatus, lithography apparatus, and method of manufacturing article

#17
20160246182
2016-08-25

Optical imaging device with image defect determination

#18
20160123717
2016-05-05

Multiple beam path laser optical system using multiple beam reflector

#19
20160061587
2016-03-03

Device for interferential distance measurement

#20
20160033257
2016-02-04

Interferometer having two transparent plates in parallel for making reference and measurement beams parallel

#21
20150346121
2015-12-03

Integrated reciprocal space mapping for simultaneous lattice parameter refinement using a two-dimensional X-ray detector

#22
20150022820
2015-01-22

Measuring device for high-precision optical determination of distance or position

#23
20140376002
2014-12-25

Interferometer

#24
20140176962
2014-06-26

Interferometer

#25
20140160491
2014-06-12

Method for the absolute measurement of the flatness of the surfaces of optical elements, using an interferometer and a three-flat method

#26
20140016108
2014-01-16

Optical imaging device with image defect determination

#27
20130335746
2013-12-19

Device for distance measurement

#28
20130250307
2013-09-26

Displacement detecting device

#29
20130194583
2013-08-01

Interferometer devices for determining initial position of a stage or the like

#30
20130057872
2013-03-07

Device for determining distance interferometrically

#31
20120327424
2012-12-27

Double pass interferometer with tilted mirrors

#32
20110164232
2011-07-07

Optical imaging device with image defect determination

#33
20110157598
2011-06-30

Multi-beam interferometer displacement measuring system utilized in a large measuring range

#34
20110157595
2011-06-30

Rotary Interferometer

#35
20110141479
2011-06-16

Interferometer

#36
20110043819
2011-02-24

Laser gauge interferometer

#37
20100238456
2010-09-23

Interferometer

#38
20100141957
2010-06-10

Laser interferometer system for measuring roll angle

#39
20090310105
2009-12-17

Optical member, interferometer system, stage apparatus, exposure apparatus, and device manufacturing method

#40
20090290162
2009-11-26

Phase-conjugate optical coherence tomography methods and apparatus

#41
20090284750
2009-11-19

Double pass interferometer with tilted mirrors

#42
20090237673
2009-09-24

Spectral domain phase microscopy (SDPM) dual mode imaging systems and related methods and computer program products

#43
20090109442
2009-04-30

Interferometer with Double Polarizing Beam Splitter

#44
20090073457
2009-03-19

Polarizing different phases of interfered light used in a method and apparatus for measuring displacement of a specimen

#45
20080304079
2008-12-11

Displacement measurement sensor head and system having measurement sub-beams comprising zeroth order and first order diffraction components

#46
20080273192
2008-11-06

Vibration detection device

#47
20080117428
2008-05-22

Multi-axis interferometers and methods and systems using multi-axis interferometers

#48
20080062405
2008-03-13

Compensation of effects of atmospheric perturbations in optical metrology

#49
20070206197
2007-09-06

Spectral domain phase microscopy (SDPM) dual mode imaging systems and related methods and computer program products

#50
20070188767
2007-08-16

Optics system for an interferometer that uses a measuring mirror, a reference mirror and a beam deflector

#51
20070086016
2007-04-19

Interferometer using integrated retarders to reduce physical volume

#52
20070035742
2007-02-15

Beam shear reduction in interferometry systems

#53
20070024863
2007-02-01

Absolute position measurement apparatus

#54
20070019210
2007-01-25

Time-delayed source and interferometric measurement of windows and domes

#55
20070019207
2007-01-25

Interferometer for measurement of dome-like objects

#56
20070002330
2007-01-04

Apparatus and methods for reducing non-cyclic non-linear errors in interferometry

#57
20060279743
2006-12-14

Measuring device and method for determining relative positions of a positioning stage configured to be moveable in at least one direction

#58
20060256346
2006-11-16

Compensation of turbulent effects of gas in measurement paths of multi-axis interferometers

#59
20060244971
2006-11-02

Discrete quarter wave plates for displacement measuring interferometers

#60
20060215173
2006-09-28

Multi-axis interferometer with procedure and data processing for mirror mapping

#61
20060187464
2006-08-24

Interferometry systems and methods of using interferometry systems

#62
20060176490
2006-08-10

Temperature/thickness measuring apparatus, temperature/thickness measuring method, temperature/thickness measuring system, control system and control method

#63
20060087659
2006-04-27

Low walk-off interferometer

#64
20060082783
2006-04-20

Position detection apparatus and method

#65
20060061771
2006-03-23

Compensation for effects of beam misalignments in interferometer metrology systems

#66
20060039005
2006-02-23

Differential interferometers creating desired beam patterns

#67
20050259268
2005-11-24

Heterodyne laser interferometer for measuring wafer stage translation

#68
20050248772
2005-11-10

Interferometry systems and methods of using interferometry systems

#69
20050248771
2005-11-10

Lithographic interferometer system with an absolute measurement subsystem and differential measurement subsystem and method thereof

#70
20050237536
2005-10-27

Interferometry systems and methods of using interferometry systems

#71
20050195404
2005-09-08

Interferometer assemblies having reduced cyclic errors and system using the interferometer assemblies

#72
20050179911
2005-08-18

Aspheric diffractive reference for interferometric lens metrology

#73
20050168755
2005-08-04

Spatial filtering in interferometry

#74
20050168754
2005-08-04

Cyclic error reduction in average interferometric position measurements

#75
20050168750
2005-08-04

MEASUREMENT SYSTEM FOR DETERMINING THE THICKNESS OF A LAYER DURING A PLATING PROCESS

#76
20050146727
2005-07-07

Multi-axis interferometers and methods and systems using multi-axis interferometers

#77
20050111005
2005-05-26

Integrated plane mirror and differential plane mirror interferometer system

#78
20050030549
2005-02-10

Spatial filtering in interferometry

#79
20050018206
2005-01-27

Compensation for geometric effects of beam misalignments in plane mirror interferometer metrology systems

#80
20050002040
2005-01-06

Lithographic apparatus, device manufacturing method, and computer program