IT8149459A0 - REFRACTOMETER FOR THE ANALYSIS OF PRECIOUS STONES - Google Patents

REFRACTOMETER FOR THE ANALYSIS OF PRECIOUS STONES

Info

Publication number
IT8149459A0
IT8149459A0 IT8149459A IT4945981A IT8149459A0 IT 8149459 A0 IT8149459 A0 IT 8149459A0 IT 8149459 A IT8149459 A IT 8149459A IT 4945981 A IT4945981 A IT 4945981A IT 8149459 A0 IT8149459 A0 IT 8149459A0
Authority
IT
Italy
Prior art keywords
refractometer
analysis
precious stones
precious
stones
Prior art date
Application number
IT8149459A
Other languages
Italian (it)
Other versions
IT1197423B (en
Inventor
Manfred Eickhorst
Original Assignee
Manfred Eickhorst
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 Manfred Eickhorst filed Critical Manfred Eickhorst
Publication of IT8149459A0 publication Critical patent/IT8149459A0/en
Application granted granted Critical
Publication of IT1197423B publication Critical patent/IT1197423B/en

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
IT49459/81A 1980-10-11 1981-10-09 REFRACTOMETER FOR THE ANALYSIS OF PRECIOUS PETRE IT1197423B (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
IT8149459A0 true IT8149459A0 (en) 1981-10-09
IT1197423B IT1197423B (en) 1988-11-30

Family

ID=6114175

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49459/81A IT1197423B (en) 1980-10-11 1981-10-09 REFRACTOMETER FOR THE ANALYSIS OF PRECIOUS PETRE

Country Status (4)

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

Families Citing this family (4)

* 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
CN105424705B (en) * 2015-12-16 2017-11-17 中国地质大学（武汉） A kind of adjustable gem refractometer

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
DE7714525U1 (en) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg REFRACTOMETER FOR GEMSTONES WITH HOUSING AND LIGHTING DEVICE
DE7714524U1 (en) * 1977-05-07 1978-10-26 Eickhorst, Manfred, 2000 Hamburg REFRACTOMETER FOR GEMSTONES WITH TEST BODY AND LIGHT SOURCE
JPS552943A (en) * 1978-06-21 1980-01-10 Tadashi Saito Optical fiber type precious stone discriminator

Also Published As

Publication number Publication date
GB2085611B (en) 1984-08-08
GB2085611A (en) 1982-04-28
JPS5793237A (en) 1982-06-10
DE3038477A1 (en) 1982-05-06
IT1197423B (en) 1988-11-30

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