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Class Information
Number: 356
Name: Optics: measuring and testing >
Description: A. This class includes methods and apparatus (1) for analyzing light to measure or test its characteristics, such as intensity, color and polarization; (2) for determining the optical or nonoptical properties of materials or articles by noting, as by inspection, measurement, or test the effect produced by the materials or articles on light associated therewith; and (3) for measuring the dimensions of structures or the spatial relationships such as distances or angle bearings of spaced points by comparison of the respective properties (usually direction or spatial position) of the light from these points or by comparison of the properties of these lights with some scale or standard. The light analyzing includes or is for spectroscopy, interference, polarization, beam direction or pattern, focal position of a light source, shade or color, and photometers. The material or article properties determined are or involve crystal or gem examination, material strain analysis, blood analysis, optical pyrometers, egg candling, cutting blade sharpness, oil testing, document verification, flatness, lens or reflector testing, refraction testing, monitoring moving webs or fabrics, light transmission or absorption, light reflection, inspection for flaws or imperfections in materials, and thread counting.


Class Number Class Name No. of Patents
356/916

Altimeters for aircraft (go1c 5/00a)

0
356/138

Angle measuring or angular axial alignment

418
356/153

Alignment of axes nominally coaxial

357
356/140

Apex of angle at observing or detecting station

33
356/148

Artificial reference

31
356/149

Gyroscope or pendulum stabilized optical element

66
356/147

Measurement in two planes (e.g., azimuth and elevation; hour angle and declination)

47
356/142

Scale and remote point simultaneously observable

17
356/143

Artificial reference

9
356/141.1

With photodetection of reflected beam angle with respect to a unidirectional source beam

354
356/141.2

With photodetection

98
356/141.5

With at least 2-dimensional sensitivity

237
356/141.4

With optical scanning of light beam or detector

152
356/141.3

With unidirectional or planar source beam directed at the photodetecting station

213
356/144

With plural images

23
356/145

Lines of sight relatively adjustable with two degrees of freedom

17
356/146

Two or more lines of sight deflected

20
356/139.04

Automatic following or aligning while indicating measurement

81
356/139.05

With optical elements moving relative to fixed housing to follow or align

73
356/139.06

With optical housing moving to follow or align

52
356/139.07

With photodetection of reflected beam angle with respect to a unidirectional source beam

51
356/139.08

With source beam moving to follow or align

59
356/139.1

Photodetection of inclination from level or vertical

83
356/139

Plural scales or different portions of same scale simultaneously observable

25
356/139.03

Relative attitude indication along 3 axes with photodetection

201
356/150

Sides of angle or axes being aligned transverse to optical axis (e.g., drift meter)

87
356/151

With light pulsing or interrupting means

11
356/139.01

Star/sun/satellite position indication with photodetection

91
356/139.02

With reticle or slot

16
356/139.09

Wheel alignment with photodetection

135
356/152.1

With photodetection remote from measured angle

126
356/152.2

With reflection of a unidirectional source beam from a planar or nonretroreflective surface

112
356/152.3

With reflection of a unidirectional source beam from a retroreflector

86
356/154

With screen

66
356/155

Wheel alignment

135
356/39

Blood analysis

852
356/40

Hemoglobin concentration

102
356/41

Oximeters

290
356/42

Standards

48
356/399

By alignment in lateral direction

653
356/400

With light detector (e.g., photocell)

964
356/401

With registration indicia (e.g., scale)

1225
356/388

By configuration comparison

83
356/394

With comparison to master, desired shape, or reference voltage

607
356/398

With object being compared and light beam moved relative to each other (e.g., scanning)

142
356/397

With object being compared and scale superimposed

60
356/389

With photosensitive film or plate

38
356/391

With projection on viewing screen

31
356/392

For comparison with master or desired configuration

40
356/393

Having master or desired configuration projection

20
356/395

With relatively movable optical grids

73
356/396

With scale or optical grid displaced relative to remote fiducial mark

31
356/390

With two images of single article compared

86
356/300

By dispersed light spectroscopy

371
356/302

For spectrographic (i.e., photographic) investigation

52
356/305

With diffraction grating

100
356/304

With sectored disc

2
356/303

With spectral analysis

99
356/326

Utilizing a spectrometer

697
356/328

Having diffraction grating means

876
356/329

Including servo slit adjustment means

12
356/327

Having light polarizing means

71
356/330

Having optical gating means

84
356/319

Utilizing a spectrophotometer (i.e., plural beam)

375
356/323

Having beam modulation

88
356/325

Prior to testing

98
356/324

With plural dispersion

16
356/320

Having plural wavelengths

135
356/321

Having servo equalization

11
356/322

With polarized light beams

18
356/310

With aperture mask

95
356/307

With background radiation comparison

113
356/306

With internal standard comparison

34
356/331

With monochromator structure

49
356/332

Having adjustable color or bandwidth

60
356/333

In a double monochromator

53
356/334

With diffraction grating means

278
356/301

With raman type light scattering

700
356/311

With sample excitation (e.g., burning)

164
356/313

By arc or spark

77
356/314

Including sputtering

23
356/312

By electrical resistance heating (e.g., graphite tube)

165
356/315

By flame

120
356/316

By high frequency field (e.g., plasma discharge)

267
356/317

By light

565
356/318

Monochromatic (e.g., laser)

856
356/308

With synchronized spectrum repetitive scanning (e.g., cathode-ray readout)

90
356/309

Using plural beams

20
356/344

By electrophoresis

238
356/426

By inspection with agitation or rotation

103
356/427

Of container contents

189
356/428

Of containers

97
356/450

By light interference (e.g., interferometer)

407
356/496

For dimensional measurement

178
356/511

Contour or profile

284
356/512

By wavefront detection

301
356/513

Of highly reflective surface (e.g., mirror)

126
356/514

Planar surface

73
356/515

Of transmission (e.g., lens)

124
356/516

Step height (differential, between points)

50
356/498

Displacement or distance

272
356/499

Having wavefront division (e.g., by diffraction)

226
356/501

Of probe head (e.g., atomic force microscope)

58
356/502

Surface displacement due to acoustic wave propagation)

138
356/500

X-y and/or z table

188
356/508

For orientation or alignment

146
356/509

Between mask and wafer

90
356/510

Tilt

75
356/505

Gap

53
356/507

Between slider/disc (e.g., flying height)

60
356/506

Fabry-perot type

53
356/497

Having short coherence length source

317
356/503

Thickness

191
356/504

Refraction from surfaces of different refractive index

160
356/517

For refractive indexing

167
356/518

Having schlieren effect

4
356/484

Having light beams of different frequencies (e.g., heterodyning)

317
356/485

For dimensional measurement (e.g., thickness gap, alignment, profile)

90
356/490

Alignment

50
356/489

Contour or profile

93
356/486

Displacement or distance

108
356/487

Polarization

155
356/488

Having wavefront division (e.g., by diffraction)

27
356/519

Having partially reflecting plates in series (e.g., fabry-perot type)

382
356/491

Having polarization

222
356/492

For dimensional measurement

81
356/495

Contour or profile

121
356/493

Displacement or distance

137
356/494

Having wavefront division (e.g., by diffraction)

59
356/520

Having shearing

188
356/521

Having wavefront division (by diffraction)

325
356/457

Holography

98
356/458

For optical configuration

96
356/459

Rotation rate (e.g., ring laser gyros)

164
356/460

By fiber or waveguide interferometer (e.g., sagnac effect)

238
356/465

Fiber coil winding

69
356/466

Having m x n loop coupler where (m is greater than 2) and (n is greater than or equal to 2) (e.g., passive bias)

28
356/464

Having null feedback loop

141
356/462

Multi-axis (x-y-z) having multiplexing

25
356/463

Multiple harmonic output

31
356/461

Resonant loop

96
356/469

Cavity mirror details

61
356/468

Cavity output beam combiner

38
356/467

Four frequency, multi-oscillator, non-planar cavity

68
356/472

Lock-in prevention

36
356/476

By dithering (suspensions, drives, flexures)

52
356/475

Having dither signal control

15
356/474

Having dither signal removal from output

14
356/473

Path length control (plc)

52
356/471

Multi-axis cavity

20
356/470

Passive cavity (laser source outside cavity)

21
356/451

Spectroscopy

287
356/454

Fabry-perot type or etalon type

186
356/455

Having a rotating, pendulous, or wedge scanning element

78
356/452

Having particular linear mirror drive or configuration

66
356/456

Imaging

76
356/453

Polarization

55
356/477

Using fiber or waveguide interferometer

487
356/482

For distance or displacement measurement

109
356/479

Having a short coherence length source

250
356/478

Multiplexed sensor array

151
356/483

Plural counter-propagating beams (e.g., non-motion sagnac device)

91
356/481

Refraction indexing

56
356/480

Resonant cavity

171
356/429

By monitoring of webs or thread

347
356/430

For flaws or imperfections

335
356/431

Including transverse scanning

234
356/337

By particle light scattering

278
356/338

With photocell detection

632
356/339

At right angles to the light beam (e.g., nephelometer)

234
356/340

At variable angle to the light beam

101
356/341

For light comparison means

103
356/342

Of back-scattered light

231
356/343

Using plural photocells

271
356/364

By polarized light examination

594
356/369

Of surface reflection

794
356/365

With birefringent element

187
356/370

With light attenuation

38
356/366

With polariscopes

71
356/367

Including polarimeters

188
356/368

With electro-optical light rotation

158
356/402

By shade or color

470
356/409

Fluid color transmission examination

67
356/410

Of flowing liquids

133
356/411

With plural light detectors (e.g., photocells)

62
356/414

With color transmitting filter

110
356/415

Including liquid filter comparison

3
356/412

With ionic determination

20
356/413

With variable light path length

13
356/404

Photography

93
356/406

Trichromatic examination

150
356/405

Tristimulus examination

164
356/425

With color determination by light intensity comparison

232
356/416

With color transmitting filter

200
356/420

Included with colored light sources

48
356/417

Included with sample excitation

540
356/419

Including multicolor filters

355
356/418

Including rotating sequential filters

242
356/403

With merging colors or patterns (e.g., maxwell disc)

10
356/421

With reflective multicolor chart or standard

69
356/424

Drum or endless tape

3
356/422

Plate

23
356/423

Disk

23
356/407

With sample responsive to plural colors applied simultaneously

219
356/408

With sequential comparison of sample and standard

91
356/2

Contour plotting

126
356/30

Crystal or gem examination

180
356/31

Axes determination

23
356/69

Cutting blade sharpness

3
356/625

Dimension

344
356/628

Area

55
356/629

Light scanning

43
356/626

Cavities

78
356/634

Length

132
356/630

Thickness

486
356/631

By triangulation

69
356/632

Of light permeable material

311
356/627

Volume

103
356/635

Width or diameter

221
356/636

Line width

136
356/638

Shadow or beam blocking

145
356/639

Scanning

49
356/640

Single beam scans entire width or diameter

77
356/637

Web

33
356/71

Document pattern analysis or verification

672
356/52

Egg candling

18
356/68

Lamp attachments

3
356/53

Photoelectric

30
356/54

With counting, marking, or weighing

5
356/55

With egg transfer

4
356/58

Endless conveyor

9
356/59

Manual transfer

3
356/61

Portable receptacles

1
356/60

With light shading chamber

0
356/56

With egg turning or jarring

3
356/57

Endless conveyor

1
356/64

With light box

2
356/65

With egg turning or jarring

0
356/66

With particular illumination means

7
356/67

With particular electrical switching

3
356/62

With light shading chamber

4
356/63

Hood type

1
356/247

Fiducial instruments

80
356/248

Artificial reference

37
356/249

Liquid surface (e.g., bubble level)

45
356/250

Pendular suspension of optical element or reticle

46
356/253

Deflection of line of sight

6
356/255

By reflection

29
356/254

Two or more deflections

12
356/251

Reticle lies outside viewing path

46
356/252

Reticle image transversely adjustable relative to optical axis

52
356/123

Focal position of light source

77
356/432

For light transmission or absorption

743
356/433

By comparison

118
356/434

Photoelectric (e.g., sequential viewing)

172
356/435

With plural detectors (e.g., simultaneous viewing)

212
356/436

Of fluent material

499
356/437

Gas

443
356/438

Exhaust, dust or smoke

185
356/439

Contained

119
356/441

Having particles suspended in liquid

105
356/442

With light detector

241
356/440

With significant sample holder or supply

542
356/443

Of photographic film

95
356/444

With scanning, sweeping, or moving detector over film

90
356/73.1

For optical fiber or waveguide inspection

1261
356/335

For size of particles

258
356/336

By particle light scattering

528
356/907

Goniometers (go1b 9/10)

0
356/51

Infrared and ultraviolet

269
356/237.1

Inspection of flaws or impurities

959
356/241.1

Bore inspection (e.g., borescopes, intrascope, etc.)

192
356/241.2

Firearm bore inspection

8
356/241.4

Flexible

40
356/241.6

Having guiding means

21
356/241.5

Specific construction of distal end

22
356/241.3

With adjustable head

6
356/240.1

Containers or enclosures (e.g., packages, cans, etc.)

106
356/237.6

Having predetermined light transmission regions (e.g., holes, aperture, multiple material articles)

98
356/237.2

Surface condition

944
356/237.3

Detection of object or particle on surface

228
356/237.4

On patterned or topographical surface (e.g., wafer, mask, circuit board)

497
356/237.5

On patterned or topographical surface (e.g., wafer, mask, circuit board)

726
356/238.1

Textile inspection

73
356/238.3

Detection of foreign material (e.g., trash, splinters, contaminants, etc.)

32
356/238.2

Elongated textile product (e.g., thread, yarn, etc.)

72
356/239.1

Transparent or translucent material

267
356/239.4

Containers (e.g., bottles)

230
356/239.5

Detection of foreign matter on or in container

53
356/239.6

Of container contents

45
356/239.2

Optical element (e.g., contact lens, prism, filter, lens, etc.)

118
356/239.3

Patterned surface

33
356/239.7

Surface condition

74
356/239.8

Detection of an object or particle on surface

81
356/900

Interferometers (go1b 9/02)

0
356/902

Involving diffraction gratings (go1b 9/02g)

0
356/901

Involving fiber optics or integrated optics (go1b 9/02f)

2
356/903

Using holographic techniques (go1b 9/021)

0
356/928

Investigating or analyzing materials by the use of optical means, i.e., using infra-red, visible, or ultra-violet light (go1n 21/00)

6
356/929

Arrangements, or apparatus for facilitating the optical investigation (go1n 21/01)

3
356/930

Cuvette constructions (go1n 21/03)

0
356/953

Probe photometers (go1n 21/85b)

1
356/954

Scan or image signal processing arrangements specially adapted for investigating the presence of flaws or contaminates, e.g., for scan signal adjustments, for detecting different kinds of defects, for compensating for structures (go1n 21/88)

0
356/931

Systems in which incident light is modified in accordance with the properties of material investigated (go1n 21/17)

3
356/939

Color; spectral properties, i,e., comparison of effect of material on the light at two or more different wavelengths or wavelength bands (go1n 21/25)

3
356/942

Arrangements using two alternating lights and one detector (go1n 21/25d)

0
356/940

Colorimeters (go1n 21/25b)

1
356/941

For batch operation, i.e., multi-sample apparatus (go1n 21/25b2)

0
356/945

Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g., atomic absorption spectrometry (go1n 21/31)

4
356/943

Using photo-electric detection (go1n 21/27)

2
356/944

For following a reaction, e.g., for determining photometrically a reaction rate (go1n 21/27c)

0
356/935

Dichroism (go1n 21/19)

0
356/946

Holographic interferometry (go1n 21/45b)

0
356/936

Polarization-affecting properties (go1n 21/21)

2
356/938

Bi-refringence (go1n 21/23)

0
356/937

Ellipsometry (go1n 21/21b)

2
356/947

Scattering, i.e., diffuse reflection (go1n 21/47f)

4
356/933

With calorimetric detection, e.g., with thermal lens detection (go1n 21/17c)

0
356/934

With modulation of one or more physical properties of the sample during optical investigation, e.g., electra reflectance (go1n 21/17m)

0
356/932

With opto-acoustic detection, e.g., for gases or analyzing solids (go1n 21/17b)

0
356/948

Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light (go1n 21/62)

0
356/949

Optically excited (go1n 21/63)

2
356/951

Florescence; phosphorescence (go1n 21/64)

3
356/952

Raman scattering (go1n 21/65)

0
356/950

Using photolysis and investigating photolyzed fragments (go1n 21/63c)

0
356/121

Lamp beam direction or pattern

326
356/122

With lamp focusing

13
356/124

Lens or reflective image former testing

490
356/125

Focal length measuring

122
356/126

Deflecting or interrupting optical path

22
356/124.5

For optical transfer function

87
356/127

Optical center, cylinder axis, or prism measuring or determining

146
356/32

Material strain analysis

218
356/35.5

By light interference detector (e.g., interferometer)

217
356/33

With polarized light

69
356/34

Attached detector

31
356/35

Sheet material

31
356/912

Measuring angles (go1c 1/00)

1
356/915

Sextants (go1c 1/08)

0
356/913

Theodolites (go1c 1/02)

0
356/914

Combined with cameras (go1c 1/04)

0
356/917

Measuring inclination, e.g., by clinometers, by levels (go1c 9/00)

0
356/908

Measuring length, width, or thickness (go1b 11/02)

4
356/910

By means of diode-array scanning (go1b 11/02c)

1
356/909

By means of tv-camera scanning (go1b 11/02b)

1
356/955

Measuring linear or angular speed utilizing devices characterized by the use of optical means, e.g., using infra-red, visible, or ultra-violet light (go1p 3/36)

0
356/956

Using a ring laser (go1p 3/36b)

1
356/957

Using diffraction of light (go1p 3/36c)

1
356/958

Using photographic means (go1p 3/38)

1
356/904

Measuring microscopes (go1b 9/04)

5
356/925

Measuring optical phase difference: measuring optical wavelength (go1j 9/00)

4
356/905

Measuring telescopes (go1b 9/06)

0
356/926

Measuring the characteristics of individual optical pulses or of optical pulse trains (go1j 11/00)

1
356/911

Measuring the deformation in a solid, e.g., optical strain gauge (go1b 11/16)

0
356/927

Measuring variations of optical properties of material when it is stressed, e.g., by photoelastic stress analysis using infra-red, visible light, ultra-violet (go1l 1/24)

0
356/924

Measuring velocity of light (golj 7/00)

0
356/256

Miscellaneous

58
356/23

Motion stopping (e.g., stroboscopes)

58
356/25

Periodically moving light interrupting element

5
356/26

Vibrating or oscillating element

2
356/24

Periodically moving reflecting or refracting element

8
356/445

Of light reflection (e.g., glass)

1102
356/448

By comparison

241
356/446

With diffusion

585
356/447

With modulation (e.g., flicker beam)

52
356/70

Oil testing (e.g., contamination)

118
356/29

Optical element or reticle responds to relative velocity of remote object

17
356/906

Optical projection comparators, e.g., for profile (go1b 9/08)

0
356/43

Optical pyrometers

193
356/45

Plural color responsive

79
356/46

With incandescent standard

6
356/47

Automatic intensity control

5
356/48

Modulating (e.g., flicker beam)

4
356/49

Telescopic

9
356/50

Current control

4
356/44

With sample engaging rod or tube

120
356/918

Photogrammetry; photographic surveying (go1c 11/00)

2
356/921

Interpretation of pictures (go1c 11/04)

1
356/919

Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g., controlling overlapping of pictures (go1c 11/02)

1
356/920

By scanning the object (go1c 11/02a)

0
356/213

Photometers

128
356/229

Comparison

54
356/230

With light standard

26
356/232

Standard movable

2
356/231

Variable incandescent standard

0
356/216

Heat absorbing (e.g., radiometers)

27
356/236

Integrating spheres

153
356/215

Integrating

59
356/234

Light absorbing

25
356/235

Absorber continuously variable (e.g., wedge)

9
356/217

Modulating (e.g., flicker beam)

6
356/218

Photoelectric

215
356/226

Detector and indicator electrical coupling (e.g., amplifying or attenuating)

112
356/223

Logarithmic

42
356/220

Multiple housings

7
356/224

Multisensitivity range

27
356/222

Plural detectors

163
356/221

Responsive to incident or back lighting

37
356/219

Simultaneous sighting and reading measurement

21
356/227

With particular indicator

30
356/228

Movable scale (e.g., calibrating)

8
356/225

With predetector light modifier (e.g., diaphragm)

74
356/214

Pupillary

7
356/233

With variable light aperture size

13
356/922

Photometry, e.g., photographic exposure meter (go1j 11/04)

0
356/73

Plural test

807
356/614

Position or displacement

761
356/624

Focus

114
356/615

Position transverse to viewing axis

193
356/616

Having scale or grid

170
356/617

Coded scale

90
356/618

Moire

109
356/619

Quadrature detection

72
356/621

Occulting a projected light beam

115
356/622

Position of detected arrangement relative to projected beam

196
356/620

Special mark or target on object

212
356/623

Triangulation

200
356/923

Radiation pyrometry (golj 5/00)

0
356/3

Range or remote distance finding

136
356/9

Base line instrument (i.e., base is a part of instrument)

5
356/16

Image displaced by moving refracting element

15
356/17

Image displaced by rotating reflecting element

9
356/15

Length of base line variable

5
356/19

Prism structure for determining coincidence

6
356/11

Range finder combined with height finder

9
356/12

Stereoscopic

104
356/13

Ortho-pseudo type

3
356/14

Stationary measuring marks

5
356/10

With filter or light valve

10
356/18

With mounting, supporting, adjusting, or folding structure

8
356/20

External basis type

5
356/21

Object size or distance known

32
356/22

With displaced images

7
356/6

Instrument condition testing or indicating

17
356/7

Periscope or offset type

3
356/3.01

Triangulation ranging to a point with one projected beam

172
356/3.09

Requiring scanning of a source beam

59
356/3.03

Using a source beam with a fixed axial direction or plane

58
356/3.06

With a single photodetector having multiple elements

86
356/3.07

Having electronic scanning of the photodetector

44
356/3.04

With a single staring photodetector having one element

119
356/3.05

Having moving receiver optics

35
356/3.08

With at least one paired set of staring photodetectors

76
356/3.02

Using photodetection with a fixed axial line of sight

49
356/3.1

Triangulation ranging to a point with two or more projected beams

49
356/3.11

Using photodetection at the source station(s)

41
356/3.12

Using photodetection remote from the source station(s)

32
356/3.13

Triangulation ranging with photodetection, but with no projected beam

30
356/3.14

Using at least a pair of viewing axes

117
356/3.16

With moving optical elements in all viewing axes

25
356/3.15

With one viewing axis fixed

47
356/4.01

With photodetection

661
356/4.02

Of a simulation or test

45
356/5.1

Of cw phase delay

159
356/5.13

Having an alternating reference path

25
356/5.11

Having multiple carrier or modulation frequencies

43
356/5.12

Including an alternating reference path

12
356/5.14

Having polarization discrimination

17
356/5.15

Having specific if mixing of returns

91
356/4.04

Of degree of defocus

53
356/4.06

Of differential amplitude at two source or detector distances

29
356/4.05

Of focal point search

32
356/4.03

Of focused image size or dimensions

77
356/5.09

Of frequency difference

139
356/4.08

Of height relative to a light plane

98
356/4.07

Of intensity proportional to distance

108
356/4.09

Of light interference fringes

62
356/4.1

Having different frequency sources

45
356/5.01

Of pulse transit time

499
356/5.03

Having one or more return pulse gates or windows

63
356/5.04

Including a displayed image

73
356/5.05

Having pulse transmission trigger significance

73
356/5.06

Including optical pick-off of transmission start

40
356/5.07

With specific counter type timing of returns

31
356/5.08

Including specific counter type timing of returns

70
356/5.02

Having return coincide with swept display or detector

34
356/8

With view finder

14
356/128

Refraction testing (e.g., refractometers)

281
356/130

Differential

30
356/131

With servo controlled optical member

5
356/132

Reflective optical member

5
356/135

Prism engaging specimen

56
356/136

Internally reflecting prism

89
356/137

Plural prisms

18
356/134

Prism forming fluid specimen container

23
356/133

Refractive rod engages specimen

77
356/129

Schlieren effect

24
356/244

Sample, specimen, or standard holder or support (e.g., plates or slides)

789
356/245

Cotton graders

6
356/246

Fluid containers (e.g., cells or cuvettes)

1133
356/601

Shape or surface configuration

567
356/609

By focus detection

128
356/610

By projection of coded pattern

47
356/612

By specular reflection

110
356/611

By stereo

51
356/613

Silhouette

264
356/602

Triangulation

234
356/606

Line of light projected

109
356/607

Scan

55
356/603

Projection of structured light pattern

154
356/604

Pattern is series of non-intersecting lines

104
356/605

Moire

84
356/608

Scan

166
356/243.1

Standard

254
356/243.3

Flying height testers

15
356/243.2

For fluid suspended particles

42
356/243.4

Surface standard

81
356/243.5

Color

45
356/243.6

Foreign object

10
356/243.8

Light intensity

19
356/243.7

Texture

5
356/600

Surface roughness

287
356/242.1

Thread counting

3
356/27

Velocity or velocity/height measuring

51
356/28

With light detector (e.g., photocell)

487
356/28.5

Of light interference (e.g., interferometer)

455
356/72

With plural diverse test or art

434
356/36

With sample preparation

305
356/37

Condensation nuclei detector

52
356/38

Depositing particles on optical surface

69
 
 
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