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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)

1
356/138

Angle measuring or angular axial alignment

517
356/153

Alignment of axes nominally coaxial

378
356/140

Apex of angle at observing or detecting station

40
356/148

Artificial reference

36
356/149

Gyroscope or pendulum stabilized optical element

69
356/147

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

48
356/142

Scale and remote point simultaneously observable

20
356/143

Artificial reference

9
356/141.1

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

399
356/141.2

With photodetection

108
356/141.5

With at least 2-dimensional sensitivity

260
356/141.4

With optical scanning of light beam or detector

162
356/141.3

With unidirectional or planar source beam directed at the photodetecting station

222
356/144

With plural images

28
356/145

Lines of sight relatively adjustable with two degrees of freedom

20
356/146

Two or more lines of sight deflected

20
356/139.04

Automatic following or aligning while indicating measurement

109
356/139.05

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

84
356/139.06

With optical housing moving to follow or align

60
356/139.07

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

62
356/139.08

With source beam moving to follow or align

70
356/139.1

Photodetection of inclination from level or vertical

125
356/139

Plural scales or different portions of same scale simultaneously observable

42
356/139.03

Relative attitude indication along 3 axes with photodetection

227
356/150

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

90
356/151

With light pulsing or interrupting means

11
356/139.01

Star/sun/satellite position indication with photodetection

133
356/139.02

With reticle or slot

22
356/139.09

Wheel alignment with photodetection

174
356/152.1

With photodetection remote from measured angle

141
356/152.2

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

120
356/152.3

With reflection of a unidirectional source beam from a retroreflector

95
356/154

With screen

77
356/155

Wheel alignment

145
356/39

Blood analysis

1024
356/40

Hemoglobin concentration

130
356/41

Oximeters

305
356/42

Standards

52
356/399

By alignment in lateral direction

796
356/400

With light detector (e.g., photocell)

1073
356/401

With registration indicia (e.g., scale)

1423
356/388

By configuration comparison

99
356/394

With comparison to master, desired shape, or reference voltage

651
356/398

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

152
356/397

With object being compared and scale superimposed

62
356/389

With photosensitive film or plate

45
356/391

With projection on viewing screen

33
356/392

For comparison with master or desired configuration

57
356/393

Having master or desired configuration projection

26
356/395

With relatively movable optical grids

76
356/396

With scale or optical grid displaced relative to remote fiducial mark

35
356/390

With two images of single article compared

99
356/300

By dispersed light spectroscopy

551
356/302

For spectrographic (i.e., photographic) investigation

86
356/305

With diffraction grating

120
356/304

With sectored disc

7
356/303

With spectral analysis

155
356/326

Utilizing a spectrometer

972
356/328

Having diffraction grating means

1063
356/329

Including servo slit adjustment means

15
356/327

Having light polarizing means

88
356/330

Having optical gating means

95
356/319

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

463
356/323

Having beam modulation

98
356/325

Prior to testing

102
356/324

With plural dispersion

19
356/320

Having plural wavelengths

160
356/321

Having servo equalization

12
356/322

With polarized light beams

24
356/310

With aperture mask

114
356/307

With background radiation comparison

130
356/306

With internal standard comparison

44
356/331

With monochromator structure

58
356/332

Having adjustable color or bandwidth

63
356/333

In a double monochromator

55
356/334

With diffraction grating means

297
356/301

With raman type light scattering

1106
356/311

With sample excitation (e.g., burning)

188
356/313

By arc or spark

90
356/314

Including sputtering

25
356/312

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

166
356/315

By flame

132
356/316

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

313
356/317

By light

723
356/318

Monochromatic (e.g., laser)

1005
356/308

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

97
356/309

Using plural beams

21
356/344

By electrophoresis

271
356/426

By inspection with agitation or rotation

118
356/427

Of container contents

193
356/428

Of containers

101
356/450

By light interference (e.g., interferometer)

560
356/496

For dimensional measurement

225
356/511

Contour or profile

385
356/512

By wavefront detection

365
356/513

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

156
356/514

Planar surface

79
356/515

Of transmission (e.g., lens)

171
356/516

Step height (differential, between points)

62
356/498

Displacement or distance

355
356/499

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

274
356/501

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

68
356/502

Surface displacement due to acoustic wave propagation)

190
356/500

X-y and/or z table

232
356/508

For orientation or alignment

168
356/509

Between mask and wafer

99
356/510

Tilt

86
356/505

Gap

57
356/507

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

68
356/506

Fabry-perot type

61
356/497

Having short coherence length source

533
356/503

Thickness

228
356/504

Refraction from surfaces of different refractive index

176
356/517

For refractive indexing

197
356/518

Having schlieren effect

5
356/484

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

371
356/485

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

113
356/490

Alignment

56
356/489

Contour or profile

111
356/486

Displacement or distance

136
356/487

Polarization

174
356/488

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

32
356/519

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

462
356/491

Having polarization

261
356/492

For dimensional measurement

99
356/495

Contour or profile

157
356/493

Displacement or distance

163
356/494

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

70
356/520

Having shearing

201
356/521

Having wavefront division (by diffraction)

408
356/457

Holography

129
356/458

For optical configuration

106
356/459

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

182
356/460

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

295
356/465

Fiber coil winding

77
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)

30
356/464

Having null feedback loop

154
356/462

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

29
356/463

Multiple harmonic output

33
356/461

Resonant loop

121
356/469

Cavity mirror details

67
356/468

Cavity output beam combiner

39
356/467

Four frequency, multi-oscillator, non-planar cavity

69
356/472

Lock-in prevention

37
356/476

By dithering (suspensions, drives, flexures)

54
356/475

Having dither signal control

19
356/474

Having dither signal removal from output

16
356/473

Path length control (plc)

58
356/471

Multi-axis cavity

22
356/470

Passive cavity (laser source outside cavity)

24
356/451

Spectroscopy

390
356/454

Fabry-perot type or etalon type

248
356/455

Having a rotating, pendulous, or wedge scanning element

87
356/452

Having particular linear mirror drive or configuration

78
356/456

Imaging

128
356/453

Polarization

67
356/477

Using fiber or waveguide interferometer

598
356/482

For distance or displacement measurement

144
356/479

Having a short coherence length source

421
356/478

Multiplexed sensor array

174
356/483

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

105
356/481

Refraction indexing

61
356/480

Resonant cavity

237
356/429

By monitoring of webs or thread

404
356/430

For flaws or imperfections

360
356/431

Including transverse scanning

250
356/337

By particle light scattering

441
356/338

With photocell detection

790
356/339

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

252
356/340

At variable angle to the light beam

114
356/341

For light comparison means

126
356/342

Of back-scattered light

279
356/343

Using plural photocells

308
356/364

By polarized light examination

798
356/369

Of surface reflection

979
356/365

With birefringent element

229
356/370

With light attenuation

54
356/366

With polariscopes

89
356/367

Including polarimeters

230
356/368

With electro-optical light rotation

184
356/402

By shade or color

630
356/409

Fluid color transmission examination

77
356/410

Of flowing liquids

140
356/411

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

72
356/414

With color transmitting filter

116
356/415

Including liquid filter comparison

5
356/412

With ionic determination

22
356/413

With variable light path length

18
356/404

Photography

103
356/406

Trichromatic examination

176
356/405

Tristimulus examination

194
356/425

With color determination by light intensity comparison

262
356/416

With color transmitting filter

227
356/420

Included with colored light sources

63
356/417

Included with sample excitation

669
356/419

Including multicolor filters

413
356/418

Including rotating sequential filters

264
356/403

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

13
356/421

With reflective multicolor chart or standard

86
356/424

Drum or endless tape

4
356/422

Plate

25
356/423

Disk

25
356/407

With sample responsive to plural colors applied simultaneously

253
356/408

With sequential comparison of sample and standard

114
356/2

Contour plotting

142
356/30

Crystal or gem examination

217
356/31

Axes determination

29
356/69

Cutting blade sharpness

4
356/625

Dimension

505
356/628

Area

60
356/629

Light scanning

52
356/626

Cavities

94
356/634

Length

153
356/630

Thickness

620
356/631

By triangulation

76
356/632

Of light permeable material

328
356/627

Volume

123
356/635

Width or diameter

261
356/636

Line width

163
356/638

Shadow or beam blocking

166
356/639

Scanning

60
356/640

Single beam scans entire width or diameter

84
356/637

Web

35
356/71

Document pattern analysis or verification

830
356/52

Egg candling

20
356/68

Lamp attachments

3
356/53

Photoelectric

37
356/54

With counting, marking, or weighing

6
356/55

With egg transfer

4
356/58

Endless conveyor

9
356/59

Manual transfer

3
356/61

Portable receptacles

2
356/60

With light shading chamber

0
356/56

With egg turning or jarring

5
356/57

Endless conveyor

2
356/64

With light box

4
356/65

With egg turning or jarring

1
356/66

With particular illumination means

11
356/67

With particular electrical switching

5
356/62

With light shading chamber

4
356/63

Hood type

3
356/247

Fiducial instruments

96
356/248

Artificial reference

38
356/249

Liquid surface (e.g., bubble level)

47
356/250

Pendular suspension of optical element or reticle

46
356/253

Deflection of line of sight

8
356/255

By reflection

29
356/254

Two or more deflections

12
356/251

Reticle lies outside viewing path

51
356/252

Reticle image transversely adjustable relative to optical axis

56
356/123

Focal position of light source

93
356/432

For light transmission or absorption

1050
356/433

By comparison

170
356/434

Photoelectric (e.g., sequential viewing)

191
356/435

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

238
356/436

Of fluent material

691
356/437

Gas

637
356/438

Exhaust, dust or smoke

237
356/439

Contained

137
356/441

Having particles suspended in liquid

141
356/442

With light detector

301
356/440

With significant sample holder or supply

681
356/443

Of photographic film

100
356/444

With scanning, sweeping, or moving detector over film

101
356/73.1

For optical fiber or waveguide inspection

1535
356/335

For size of particles

347
356/336

By particle light scattering

650
356/907

Goniometers (go1b 9/10)

3
356/51

Infrared and ultraviolet

372
356/237.1

Inspection of flaws or impurities

1396
356/241.1

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

225
356/241.2

Firearm bore inspection

8
356/241.4

Flexible

44
356/241.6

Having guiding means

24
356/241.5

Specific construction of distal end

29
356/241.3

With adjustable head

6
356/240.1

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

130
356/237.6

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

168
356/237.2

Surface condition

1385
356/237.3

Detection of object or particle on surface

358
356/237.4

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

706
356/237.5

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

1034
356/238.1

Textile inspection

87
356/238.3

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

40
356/238.2

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

80
356/239.1

Transparent or translucent material

333
356/239.4

Containers (e.g., bottles)

258
356/239.5

Detection of foreign matter on or in container

58
356/239.6

Of container contents

56
356/239.2

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

162
356/239.3

Patterned surface

59
356/239.7

Surface condition

106
356/239.8

Detection of an object or particle on surface

100
356/900

Interferometers (go1b 9/02)

2
356/902

Involving diffraction gratings (go1b 9/02g)

0
356/901

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

4
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)

14
356/929

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

4
356/930

Cuvette constructions (go1n 21/03)

0
356/953

Probe photometers (go1n 21/85b)

2
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)

4
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)

6
356/942

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

0
356/940

Colorimeters (go1n 21/25b)

3
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)

2
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)

5
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)

1
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)

5
356/952

Raman scattering (go1n 21/65)

4
356/950

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

0
356/121

Lamp beam direction or pattern

380
356/122

With lamp focusing

22
356/124

Lens or reflective image former testing

621
356/125

Focal length measuring

142
356/126

Deflecting or interrupting optical path

30
356/124.5

For optical transfer function

112
356/127

Optical center, cylinder axis, or prism measuring or determining

174
356/32

Material strain analysis

268
356/35.5

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

252
356/33

With polarized light

89
356/34

Attached detector

37
356/35

Sheet material

41
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)

6
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)

1
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)

7
356/925

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

7
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)

2
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)

5
356/924

Measuring velocity of light (golj 7/00)

0
356/256

Miscellaneous

76
356/23

Motion stopping (e.g., stroboscopes)

59
356/25

Periodically moving light interrupting element

5
356/26

Vibrating or oscillating element

5
356/24

Periodically moving reflecting or refracting element

8
356/445

Of light reflection (e.g., glass)

1624
356/448

By comparison

333
356/446

With diffusion

676
356/447

With modulation (e.g., flicker beam)

79
356/70

Oil testing (e.g., contamination)

131
356/29

Optical element or reticle responds to relative velocity of remote object

33
356/906

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

0
356/43

Optical pyrometers

217
356/45

Plural color responsive

83
356/46

With incandescent standard

6
356/47

Automatic intensity control

6
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

124
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

201
356/229

Comparison

71
356/230

With light standard

32
356/232

Standard movable

2
356/231

Variable incandescent standard

1
356/216

Heat absorbing (e.g., radiometers)

30
356/236

Integrating spheres

169
356/215

Integrating

65
356/234

Light absorbing

33
356/235

Absorber continuously variable (e.g., wedge)

11
356/217

Modulating (e.g., flicker beam)

13
356/218

Photoelectric

283
356/226

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

119
356/223

Logarithmic

44
356/220

Multiple housings

8
356/224

Multisensitivity range

29
356/222

Plural detectors

184
356/221

Responsive to incident or back lighting

44
356/219

Simultaneous sighting and reading measurement

24
356/227

With particular indicator

34
356/228

Movable scale (e.g., calibrating)

15
356/225

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

79
356/214

Pupillary

7
356/233

With variable light aperture size

17
356/922

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

1
356/73

Plural test

1019
356/614

Position or displacement

1255
356/624

Focus

147
356/615

Position transverse to viewing axis

268
356/616

Having scale or grid

224
356/617

Coded scale

119
356/618

Moire

115
356/619

Quadrature detection

72
356/621

Occulting a projected light beam

134
356/622

Position of detected arrangement relative to projected beam

295
356/620

Special mark or target on object

320
356/623

Triangulation

243
356/923

Radiation pyrometry (golj 5/00)

0
356/3

Range or remote distance finding

206
356/9

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

10
356/16

Image displaced by moving refracting element

17
356/17

Image displaced by rotating reflecting element

10
356/15

Length of base line variable

5
356/19

Prism structure for determining coincidence

7
356/11

Range finder combined with height finder

16
356/12

Stereoscopic

148
356/13

Ortho-pseudo type

5
356/14

Stationary measuring marks

6
356/10

With filter or light valve

13
356/18

With mounting, supporting, adjusting, or folding structure

10
356/20

External basis type

6
356/21

Object size or distance known

35
356/22

With displaced images

11
356/6

Instrument condition testing or indicating

24
356/7

Periscope or offset type

5
356/3.01

Triangulation ranging to a point with one projected beam

377
356/3.09

Requiring scanning of a source beam

71
356/3.03

Using a source beam with a fixed axial direction or plane

66
356/3.06

With a single photodetector having multiple elements

91
356/3.07

Having electronic scanning of the photodetector

48
356/3.04

With a single staring photodetector having one element

121
356/3.05

Having moving receiver optics

40
356/3.08

With at least one paired set of staring photodetectors

83
356/3.02

Using photodetection with a fixed axial line of sight

53
356/3.1

Triangulation ranging to a point with two or more projected beams

141
356/3.11

Using photodetection at the source station(s)

50
356/3.12

Using photodetection remote from the source station(s)

39
356/3.13

Triangulation ranging with photodetection, but with no projected beam

40
356/3.14

Using at least a pair of viewing axes

128
356/3.16

With moving optical elements in all viewing axes

29
356/3.15

With one viewing axis fixed

72
356/4.01

With photodetection

1084
356/4.02

Of a simulation or test

58
356/5.1

Of cw phase delay

356
356/5.13

Having an alternating reference path

29
356/5.11

Having multiple carrier or modulation frequencies

49
356/5.12

Including an alternating reference path

14
356/5.14

Having polarization discrimination

20
356/5.15

Having specific if mixing of returns

166
356/4.04

Of degree of defocus

62
356/4.06

Of differential amplitude at two source or detector distances

33
356/4.05

Of focal point search

42
356/4.03

Of focused image size or dimensions

96
356/5.09

Of frequency difference

169
356/4.08

Of height relative to a light plane

106
356/4.07

Of intensity proportional to distance

138
356/4.09

Of light interference fringes

80
356/4.1

Having different frequency sources

209
356/5.01

Of pulse transit time

882
356/5.03

Having one or more return pulse gates or windows

83
356/5.04

Including a displayed image

86
356/5.05

Having pulse transmission trigger significance

87
356/5.06

Including optical pick-off of transmission start

41
356/5.07

With specific counter type timing of returns

36
356/5.08

Including specific counter type timing of returns

74
356/5.02

Having return coincide with swept display or detector

49
356/8

With view finder

15
356/128

Refraction testing (e.g., refractometers)

339
356/130

Differential

38
356/131

With servo controlled optical member

7
356/132

Reflective optical member

10
356/135

Prism engaging specimen

68
356/136

Internally reflecting prism

98
356/137

Plural prisms

22
356/134

Prism forming fluid specimen container

27
356/133

Refractive rod engages specimen

83
356/129

Schlieren effect

28
356/244

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

941
356/245

Cotton graders

7
356/246

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

1372
356/601

Shape or surface configuration

869
356/609

By focus detection

181
356/610

By projection of coded pattern

76
356/612

By specular reflection

147
356/611

By stereo

60
356/613

Silhouette

286
356/602

Triangulation

280
356/606

Line of light projected

132
356/607

Scan

89
356/603

Projection of structured light pattern

225
356/604

Pattern is series of non-intersecting lines

125
356/605

Moire

94
356/608

Scan

218
356/243.1

Standard

305
356/243.3

Flying height testers

16
356/243.2

For fluid suspended particles

49
356/243.4

Surface standard

93
356/243.5

Color

54
356/243.6

Foreign object

11
356/243.8

Light intensity

34
356/243.7

Texture

6
356/600

Surface roughness

376
356/242.1

Thread counting

6
356/27

Velocity or velocity/height measuring

83
356/28

With light detector (e.g., photocell)

616
356/28.5

Of light interference (e.g., interferometer)

558
356/72

With plural diverse test or art

564
356/36

With sample preparation

366
356/37

Condensation nuclei detector

64
356/38

Depositing particles on optical surface

87
 
 
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