catoptric

noun (used with a singular verb)

1. the branch of optics dealing with the formation of images by mirrors.

noun

1. (functioning as singular) the branch of optics concerned with reflection, esp the formation of images by mirrors

adj.

“pertaining to mirrors or a mirror,” 1774, from Latinized form of Greek katoptrikos, from katoptron “mirror,” from kata- “against” (see cata-) + stem of optos “seen, visible” (see optic) + instrumental suffix -tron. Related: Catoptrics; catoptrical.

1. Relating to the reflection of light, especially by a mirror. Catoptric lenses are used in Fresnel lenses and many telescopes. Compare catadioptric dioptric.