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Leeson disk

 
Sci-Tech Dictionary: Leeson disk
 
(′lē·sən ′disk)

(optics) The screen sometimes used in a grease-spot photometer, in which the translucent spot at the center is star-shaped to provide a fine line of demarcation.


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Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.  Read more