Aperture

Description

An adjustable opening for radiation to enter or exit an optical instrument.

Synonyms and Related Terms

blænde (Dan.); Blende (Deut.); ouverture (Fr.); diafragma (Ned.); apertura (Pol.); bländare (Sven.)

Sources Checked for Data in Record

• Walter C. McCrone, John Gustave Delly, The Particle Atlas, W. McCrone Associates, Chicago, IV, 1972

• Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

• The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

• Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Aperture (Accessed Mar. 20, 2006) -for non-English terms