JPS552943A - Optical fiber type precious stone discriminator - Google Patents

Optical fiber type precious stone discriminator

Info

Publication number
JPS552943A
JPS552943A JP7582778A JP7582778A JPS552943A JP S552943 A JPS552943 A JP S552943A JP 7582778 A JP7582778 A JP 7582778A JP 7582778 A JP7582778 A JP 7582778A JP S552943 A JPS552943 A JP S552943A
Authority
JP
Japan
Prior art keywords
optical fiber
light
table surface
space
reception
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
JP7582778A
Other languages
Japanese (ja)
Inventor
Tadashi Saito
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
Priority to JP7582778A priority Critical patent/JPS552943A/en
Publication of JPS552943A publication Critical patent/JPS552943A/en
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

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)

Abstract

PURPOSE:To facilitate the discrimination of small precious stones on table surface by utilizing light reflectivity with the perpendicular bundles of optical fiber for light emission and reception faced with each other. CONSTITUTION:A measuring section is made of a protective tube 6 and a mould 7. Optical fiber for light emission 4 and that for light reception 5 are fastened in said mould 7 to accurately face a light emitting device and a light receiving device 9 respectively. The ends of said optical fibers are faced with each other on table surface 2 and cut accurately in respect on table surface 2. The space 3 so illustrated as to have an arc shape can be made conical for example if required. If said space 3 is conical, the light from said optical fiber for light emission 4 can be bent outward due to the refractory index differential between said optical fiber 4 and the air in said space 3 and transmitted to said optical fiber for light reception 5. In the drawings, Numerals 1 and 2 denote a precious stone and table surface. Thereby, small- grain precious stones can be discriminated accurately and easily.
JP7582778A 1978-06-21 1978-06-21 Optical fiber type precious stone discriminator Pending JPS552943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7582778A JPS552943A (en) 1978-06-21 1978-06-21 Optical fiber type precious stone discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7582778A JPS552943A (en) 1978-06-21 1978-06-21 Optical fiber type precious stone discriminator

Publications (1)

Publication Number Publication Date
JPS552943A true JPS552943A (en) 1980-01-10

Family

ID=13587401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7582778A Pending JPS552943A (en) 1978-06-21 1978-06-21 Optical fiber type precious stone discriminator

Country Status (1)

Country Link
JP (1) JPS552943A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5793237A (en) * 1980-10-11 1982-06-10 Aikuhorusuto Manfuretsudo Refractometer for gem evaluation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5793237A (en) * 1980-10-11 1982-06-10 Aikuhorusuto Manfuretsudo Refractometer for gem evaluation

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