WordReference Random House Unabridged Dictionary of American English © 2026
op′tical wedge′, 
  1. Opticsa wedge-shaped filter whose transmittance decreases from one end to the other: used as an exposure control device in sensitometry. Also called wedge. 

'optical wedge' also found in these entries (note: many are not synonyms or translations):
wedge

Forum discussions with the word(s) "optical wedge" in the title:


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