microprism

(redirected from microprisms)
Also found in: Dictionary.

microprism

[′mī·krə‚priz·əm]
(optics)
A usually circular area in the focusing screen of a camera viewfinder that is made up of tiny prisms and causes the image in the viewfinder to blur if the subject is out of focus.
References in periodicals archive ?
The brush-on lipstick comes in eight shades with holographic microprisms to create luminous lips as well as vitamins A, C and E and SPF 15.