noun, Physics, Optics.
a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels.
- Optical pyrometer
noun 1. See pyrometer
- Optical resonator
optical resonator A part of a laser, consisting of two mirrors, one highly reflective and one partly reflective, placed on either side of a laser pump. Amplified light bounces back and forth between the mirrors, enhancing stimulated emission within the pump, eventually being emitted through the partly reflective mirror. See more at laser.
noun, Physical Chemistry. 1. the angle at which the plane of polarized light is rotated when passed through an optically active substance. noun 1. the angle through which plane-polarized light is rotated in its passage through a substance exhibiting optical activity optical rotation n. The change or rotation in the plane of polarization that occurs […]
noun 1. the process of interpreting data in printed, handwritten, bar-code, or other visual form by a device (optical scanner or reader) that scans and identifies the data.
noun, Movies. 1. sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack. noun 1. sound recorded in the form of a photographic image on cinematograph films