Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1988-05-23
1990-03-06
Arnold, Bruce Y.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350536, 356 30, G02B 2106, G02B 2134, G01N 2100
Patent
active
049060830
ABSTRACT:
An apparatus, particularly a microscope, for the examination of a plurality of gemstones, pearls or similar small objects, comprises means to create dark-field illumination and a slide-type displaceable specimen holder of plastics material which has an elongate recess in its upper surface with a cross-section which narrows towards the bottom of the recess for example. The means to create the dark-field illumination comprises a cold light source, a glass-fiber bundle and polarization filter means, and the specimen holder consists of translucent material, especially Plexiglass. Additionally there is provided a device for aiding the examination of uncut gemstones and similar small objects, comprising means to create dark-field illumination and means for immersion inspection which comprises a vessel containing an immersion liquid. This vessel is equipped with a damping float of transparent material having a flat base and an open upper end, which in the operational position of the apparatus is inserted into the immersion liquid and floats therein, with the base of the damping float having a surface which is at least as large as the object to be examined.
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"Bestimmungen von Edelstein mit Edelsteinkundlichen Geraten", (Determination of Gemstones using Gemological Devices), Godehard Lenten, pp. 200-201.
Published data sheet of Plexiglass.TM. manufactured by Rohm GmbH.
Brochure from System Eickhorst, Gemmodul MS, 2000 Hamburg 76, Hans-Henry-Johann-weg 21.
Brochure from Sortoscope by Nissigem, Nossigem Lab-Service, Dr. Eberhard Sattler FAA, Buchholzstrasse 2, 5300 Bonn 1.
Article by Will Kleber, UEB, Verlag Technik, Berlin, "Einfuhrung in die Kristallographic", 10th Ed., 1969, pp. 296-300.
"The Cargille-Allen Gem Testing Set", published by R. P. Largille Laboratories, Inc., 117 Liberty St., New York, NY.
Brochure from System Eickhurst, Gemmscope, 2000 Hamburg 76, Hans-Henry-Johann-weg 21.
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Brochure "Miniature Magnetic Positioning Cube", Feb. 1, 1972, Titan Tool Supply, Inc., Buffalo, NY.
Edelsteine und Perlen, Prof. Dr. Karl Schlossmacher, 5th Edition, E. Schweitzer'sche Verlagsbuchhandlung, Stuttgart, 1969, pp. 101-104.
Arnold Bruce Y.
Kachmarik Ronald M.
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