optical bench

noun
an apparatus, as a special table or rigid beam, for the precise positioning of light sources, screens, and optical instruments used for optical and photometric studies, having a ruled bar to which these devices can be attached and along which they can be readily adjusted.

Origin:
1880–85

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
optical bench
 
n
an apparatus fitted for experimentation in optics, typically consisting of a table and an adjustable arrangement of light source, lenses, prisms, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Optical bench is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Example sentences
Therefore, water must be removed from the sample stream before it is allowed to enter the optical bench.
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