GB2085611B - Refractometer for testing gemstones - Google Patents

Refractometer for testing gemstones

Info

Publication number
GB2085611B
GB2085611B GB8130013A GB8130013A GB2085611B GB 2085611 B GB2085611 B GB 2085611B GB 8130013 A GB8130013 A GB 8130013A GB 8130013 A GB8130013 A GB 8130013A GB 2085611 B GB2085611 B GB 2085611B
Authority
GB
United Kingdom
Prior art keywords
gemstones
refractometer
testing
testing gemstones
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.)
Expired
Application number
GB8130013A
Other versions
GB2085611A (en
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 GB2085611A publication Critical patent/GB2085611A/en
Application granted granted Critical
Publication of GB2085611B publication Critical patent/GB2085611B/en
Expired 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)
GB8130013A 1980-10-11 1981-10-05 Refractometer for testing gemstones Expired GB2085611B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803038477 DE3038477A1 (en) 1980-10-11 1980-10-11 REFRACTOMETER FOR GEM EXAMINATION

Publications (2)

Publication Number Publication Date
GB2085611A GB2085611A (en) 1982-04-28
GB2085611B true GB2085611B (en) 1984-08-08

Family

ID=6114175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8130013A Expired GB2085611B (en) 1980-10-11 1981-10-05 Refractometer for testing gemstones

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105424705A (en) * 2015-12-16 2016-03-23 中国地质大学（武汉） Adjustable gem refractometer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI65496C (en) * 1982-08-30 1984-05-10 K Patents Oy MAETFOENSTER FOER PROCESSREFRAKTOMETER
JPS6236509A (en) * 1985-08-10 1987-02-17 Fujitsu Ltd Checking method for form and device therefor
US4749274A (en) * 1986-01-24 1988-06-07 Toyota Jidosha Kabushiki Kaisha Apparatus for detecting fuel mixture ratio

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538328B2 (en) * 1972-06-20 1980-10-03
JPS5351768A (en) * 1976-10-20 1978-05-11 Yuasa Battery Co Ltd Apparatus for measuring specific gravity of battery electrolyte
DE7714524U1 (en) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg REFRACTOMETER FOR GEMSTONES WITH TEST BODY AND LIGHT SOURCE
DE7714525U1 (en) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg REFRACTOMETER FOR GEMSTONES WITH HOUSING AND LIGHTING DEVICE
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
CN105424705A (en) * 2015-12-16 2016-03-23 中国地质大学（武汉） Adjustable gem refractometer
CN105424705B (en) * 2015-12-16 2017-11-17 中国地质大学（武汉） A kind of adjustable gem refractometer

Also Published As

Publication number Publication date
JPS5793237A (en) 1982-06-10
GB2085611A (en) 1982-04-28
DE3038477A1 (en) 1982-05-06
IT8149459A0 (en) 1981-10-09
IT1197423B (en) 1988-11-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19981005