An inexpensive means for increasing the magnification range of a luminoscope

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Authors:Kopp, Otto C.
Author Affiliations:Primary:
Univ. Tenn., Dep. Geol. Sci., Knoxville, TN, United States
Volume Title:Journal of Sedimentary Petrology
Source:Journal of Sedimentary Petrology, 51(2), p.667-668. Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States. ISSN: 0022-4472
Publication Date:1981
Note:In English. 1 refs.; illus.
Summary:In the widely used luminoscope the specimen, lying on the bottom of the vacuum chamber, is commonly too far away vertically from the objective lens of the microscope to permit the use of objectives having magnifications greater than 5X. To overcome this difficulty the specimen can be elevated by means of a small stage of glass plates placed underneath it. This in turn requires that the electron beam be deflected, first upward and then downward onto the specimen. This deflection can be accomplished by paired horseshoe magnets placed on top of the chamber beside the window. Their position can easily be adjusted to cause the beam to impinge on the specimen. [H.R.B.]
Subjects:Cathodoluminescence; Instruments; Sedimentary petrology; Luminoscopes; Magnification
Abstract Numbers:82M/0041
Record ID:1982007270
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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