JPS5793237A - Refractometer for gem evaluation - Google Patents

Refractometer for gem evaluation

Info

Publication number
JPS5793237A
JPS5793237A JP56161915A JP16191581A JPS5793237A JP S5793237 A JPS5793237 A JP S5793237A JP 56161915 A JP56161915 A JP 56161915A JP 16191581 A JP16191581 A JP 16191581A JP S5793237 A JPS5793237 A JP S5793237A
Authority
JP
Japan
Prior art keywords
refractometer
gem evaluation
gem
evaluation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56161915A
Other languages
English (en)
Japanese (ja)
Inventor
Aikuhorusuto Manfuretsudo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of JPS5793237A publication Critical patent/JPS5793237A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
JP56161915A 1980-10-11 1981-10-09 Refractometer for gem evaluation Pending JPS5793237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803038477 DE3038477A1 (de) 1980-10-11 1980-10-11 Refraktometer zur edelsteinuntersuchung

Publications (1)

Publication Number Publication Date
JPS5793237A true JPS5793237A (en) 1982-06-10

Family

ID=6114175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56161915A Pending JPS5793237A (en) 1980-10-11 1981-10-09 Refractometer for gem evaluation

Country Status (4)

Country Link
JP (1) JPS5793237A (it)
DE (1) DE3038477A1 (it)
GB (1) GB2085611B (it)
IT (1) IT1197423B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236509A (ja) * 1985-08-10 1987-02-17 Fujitsu Ltd 形状検査方法およびその装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI65496C (fi) * 1982-08-30 1984-05-10 K Patents Oy Maetfoenster foer processrefraktometer
US4749274A (en) * 1986-01-24 1988-06-07 Toyota Jidosha Kabushiki Kaisha Apparatus for detecting fuel mixture ratio
CN105424705B (zh) * 2015-12-16 2017-11-17 中国地质大学（武汉） 一种可调式宝石折射仪

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4920104A (it) * 1972-06-20 1974-02-22
JPS552943A (en) * 1978-06-21 1980-01-10 Tadashi Saito Optical fiber type precious stone discriminator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351768A (en) * 1976-10-20 1978-05-11 Yuasa Battery Co Ltd Apparatus for measuring specific gravity of battery electrolyte
DE7714524U1 (de) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg Refraktometer fuer edelsteine mit pruefkoerper und lichtquelle
DE7714525U1 (de) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg Refraktometer fuer edelsteine mit gehaeuse und beleuchtungseinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4920104A (it) * 1972-06-20 1974-02-22
JPS552943A (en) * 1978-06-21 1980-01-10 Tadashi Saito Optical fiber type precious stone discriminator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6236509A (ja) * 1985-08-10 1987-02-17 Fujitsu Ltd 形状検査方法およびその装置
JPH0414722B2 (it) * 1985-08-10 1992-03-13 Fujitsu Ltd

Also Published As

Publication number Publication date
GB2085611A (en) 1982-04-28
DE3038477A1 (de) 1982-05-06
GB2085611B (en) 1984-08-08
IT1197423B (it) 1988-11-30
IT8149459A0 (it) 1981-10-09

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