Class information for:
Level 1: COLLIMATION TESTING//FOCAL LENGTH MEASUREMENT//BEIJING PRECIS OPTOELECT MEASUREMENT

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
21280 426 13.5 50%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
10 4 OPTICS//PHYSICS, PARTICLES & FIELDS//PHYSICS, MULTIDISCIPLINARY 1131262
217 3       OPTICS//APPLIED OPTICS//OPTICAL ENGINEERING 50829
2616 2             TALBOT EFFECT//BACKGROUND ORIENTED SCHLIEREN//MOIRE DEFLECTOMETRY 3564
21280 1                   COLLIMATION TESTING//FOCAL LENGTH MEASUREMENT//BEIJING PRECIS OPTOELECT MEASUREMENT 426

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 COLLIMATION TESTING authKW 737260 3% 86% 12
2 FOCAL LENGTH MEASUREMENT authKW 351220 2% 70% 7
3 BEIJING PRECIS OPTOELECT MEASUREMENT address 242202 3% 24% 14
4 TALBOT INTERFEROMETRY authKW 229361 2% 40% 8
5 LASER BEAM COLLIMATION authKW 215035 1% 100% 3
6 OPTICAL TESTING INSTRUMENTS authKW 215035 1% 100% 3
7 OPT LICADA address 192718 3% 24% 11
8 EFFECTIVE FOCAL LENGTH authKW 162900 1% 45% 5
9 PHASE VISUALIZATION authKW 162900 1% 45% 5
10 OPT THER EUT MED NANOPHOTON address 149324 1% 42% 5

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 Optics 18194 85% 0% 360
2 Instruments & Instrumentation 91 5% 0% 23
3 Engineering, General 78 4% 0% 16
4 Physics, Applied 59 11% 0% 45
5 Spectroscopy 54 4% 0% 16
6 Engineering, Aerospace 51 2% 0% 8
7 Engineering, Manufacturing 6 1% 0% 4
8 Physics, Multidisciplinary 2 3% 0% 12
9 Ophthalmology 1 1% 0% 5
10 Engineering, Industrial 0 0% 0% 2

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 BEIJING PRECIS OPTOELECT MEASUREMENT 242202 3% 24% 14
2 OPT LICADA 192718 3% 24% 11
3 OPT THER EUT MED NANOPHOTON 149324 1% 42% 5
4 TECNOL SAO PAULO 120441 3% 15% 11
5 OPT LASER RUMENTAT 92154 1% 43% 3
6 COHERENT OPT 76443 2% 13% 8
7 CARRERA PERSONAL OYO CIENT TECNOL 71678 0% 100% 1
8 CONICETCICCIOP INVEST OPT 71678 0% 100% 1
9 ENGN LASER 71678 0% 100% 1
10 MECANIZACAO AUTOMACAO 71678 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 APPLIED OPTICS 26345 27% 0% 113
2 OPTICS AND LASER TECHNOLOGY 13273 7% 1% 29
3 OPTICS AND LASERS IN ENGINEERING 12032 6% 1% 24
4 SOVIET JOURNAL OF OPTICAL TECHNOLOGY 9908 2% 1% 10
5 OPTICAL ENGINEERING 9557 10% 0% 43
6 OPTIK 2685 5% 0% 20
7 OPTICS COMMUNICATIONS 2450 7% 0% 30
8 PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS 1901 3% 0% 12
9 JOURNAL OF OPTICS-NOUVELLE REVUE D OPTIQUE 1754 1% 1% 4
10 JOURNAL OF MODERN OPTICS 1619 3% 0% 12

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 COLLIMATION TESTING 737260 3% 86% 12 Search COLLIMATION+TESTING Search COLLIMATION+TESTING
2 FOCAL LENGTH MEASUREMENT 351220 2% 70% 7 Search FOCAL+LENGTH+MEASUREMENT Search FOCAL+LENGTH+MEASUREMENT
3 TALBOT INTERFEROMETRY 229361 2% 40% 8 Search TALBOT+INTERFEROMETRY Search TALBOT+INTERFEROMETRY
4 LASER BEAM COLLIMATION 215035 1% 100% 3 Search LASER+BEAM+COLLIMATION Search LASER+BEAM+COLLIMATION
5 OPTICAL TESTING INSTRUMENTS 215035 1% 100% 3 Search OPTICAL+TESTING+INSTRUMENTS Search OPTICAL+TESTING+INSTRUMENTS
6 EFFECTIVE FOCAL LENGTH 162900 1% 45% 5 Search EFFECTIVE+FOCAL+LENGTH Search EFFECTIVE+FOCAL+LENGTH
7 PHASE VISUALIZATION 162900 1% 45% 5 Search PHASE+VISUALIZATION Search PHASE+VISUALIZATION
8 BIDIRECTIONAL SHEARING INTERFEROMETER 143357 0% 100% 2 Search BIDIRECTIONAL+SHEARING+INTERFEROMETER Search BIDIRECTIONAL+SHEARING+INTERFEROMETER
9 BIREFRINGENCE CRYSTAL 143357 0% 100% 2 Search BIREFRINGENCE+CRYSTAL Search BIREFRINGENCE+CRYSTAL
10 GRATING SHEARING INTERFEROMETRY 143357 0% 100% 2 Search GRATING+SHEARING+INTERFEROMETRY Search GRATING+SHEARING+INTERFEROMETRY

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 MUDASSAR, AA , BUTT, S , (2010) SELF-IMAGING-BASED LASER COLLIMATION TESTING TECHNIQUE.APPLIED OPTICS. VOL. 49. ISSUE 31. P. 6057 -6062 16 100% 2
2 DHANOTIA, J , PRAKASH, S , (2011) COLLIMATION TESTING USING COHERENT GRADIENT SENSING.OPTICS AND LASERS IN ENGINEERING. VOL. 49. ISSUE 9-10. P. 1185 -1189 17 89% 1
3 LUO, J , BAI, J , ZHANG, JC , HOU, CL , WANG, KW , HOU, XY , (2014) LONG FOCAL-LENGTH MEASUREMENT USING DIVERGENT BEAM AND TWO GRATINGS OF DIFFERENT PERIODS.OPTICS EXPRESS. VOL. 22. ISSUE 23. P. 27921 -27931 13 100% 8
4 DISAWAL, R , DHANOTIA, J , PRAKASH, S , (2014) IMPROVED MEASUREMENT CHARACTERISTICS IN COLLIMATION TESTING USING LAU INTERFEROMETRY AND FOURIER FRINGE ANALYSIS TECHNIQUE.PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY. VOL. 38. ISSUE 4. P. 948 -955 19 68% 3
5 LI, ZG , QIU, LR , ZHAO, WQ , GUO, YK , YUAN, Q , (2015) LARGE-APERTURE ULTRA-LONG FOCAL LENGTH MEASUREMENT AND ITS SYSTEM BY LASER CONFOCAL TECHNIQUES.MEASUREMENT SCIENCE AND TECHNOLOGY. VOL. 26. ISSUE 9. P. - 12 100% 0
6 ZHAO, S , CHUNG, PS , (2007) COLLIMATION TESTING USING A CIRCULAR DAMMANN GRATING.OPTICS COMMUNICATIONS. VOL. 279. ISSUE 1. P. 1-6 16 89% 8
7 YANG, JM , QIU, LR , ZHAO, WQ , SHAO, RJ , LI, ZG , (2013) MEASURING THE LENS FOCAL LENGTH BY LASER REFLECTION-CONFOCAL TECHNOLOGY.APPLIED OPTICS. VOL. 52. ISSUE 16. P. 3812-3817 12 100% 1
8 YANG, JM , QIU, LR , ZHAO, WQ , WU, HL , (2012) LASER DIFFERENTIAL REFLECTION-CONFOCAL FOCAL-LENGTH MEASUREMENT.OPTICS EXPRESS. VOL. 20. ISSUE 23. P. 26027 -26036 13 93% 5
9 LI, ZG , QIU, LR , ZHAO, WQ , YANG, S , (2016) LASER DIFFERENTIAL CONFOCAL ULTRA-LARGE RADIUS MEASUREMENT FOR CONVEX SPHERICAL SURFACE.OPTICS EXPRESS. VOL. 24. ISSUE 17. P. 19746 -19759 12 92% 0
10 PRAKASH, S , RANA, S , PRAKASH, S , SASAKI, O , (2008) AUTOMATED COLLIMATION TESTING USING A TEMPORAL PHASE SHIFTING TECHNIQUE IN TALBOT INTERFEROMETRY.APPLIED OPTICS. VOL. 47. ISSUE 31. P. 5938 -5943 17 74% 7

Classes with closest relation at Level 1


Rank Class id link
1 12874 TALBOT EFFECT//PL OPT COMPLUTENSE GRP//SELF IMAGING
2 37203 HALF ANGLES//ANGLE DIVISIONS//FRESNELS MIRROR
3 27570 RONCHI TEST//VECTOR ALGEBRA//HARTMANN TEST
4 14433 BACKGROUND ORIENTED SCHLIEREN//INFORMAT PHYS ENGN//MOIRE DEFLECTOMETRY
5 26079 180 DEGREES ROTATION OF THE WEDGED PLATE//AMPLITUDE PHASE CHARACTERISTICS//BEAM REPLICATOR
6 805 SHEAROGRAPHY//SPECKLE INTERFEROMETRY//PHASE UNWRAPPING
7 17213 MEASUREMENT SENSOR//DEV KAJAANI//IMMERSION LIQUID METHOD
8 14505 ABSOLUTE TEST//SUBAPERTURE STITCHING//OPTICAL TESTING
9 29187 LASER BEAM LINE PROJECTORS//2 INTR INTERPOLATION AND SPATIAL TRANSFORMATIONS//2 LFLT LINEAR FILTERING AND ENHANCEMENT
10 12982 ABSOLUTE DISTANCE MEASUREMENT//GAUGE BLOCK//AIR REFRACTIVE INDEX

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