optical wedge
noun
a wedge-shaped filter whose transmittance decreases from one end to the other: used as an exposure control device in sensitometry.
Also called
wedge.
Words nearby optical wedge
optical scanning,
optical sound,
optical soundtrack,
optical tooling,
optical tweezers,
optical wedge,
optician,
opticianry,
opticist,
optico-,
opticociliary