(physics) the former name for reflection density, transmission density
optical density n.
noun, Computers, Television. 1. Also, optical disc. Also called laser disk. a grooveless disk on which digital data, as text, music, or pictures, is stored as tiny pits in the surface and is read or replayed by a laser beam scanning the surface. 2. . optical disk or optical disc A plastic-coated disk that stores […]
noun 1. See under . noun, Astronomy. 1. two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together […]
plural noun, Movies, Television. 1. special visual effects, as the wipe or dissolve, created in the camera or especially in a film laboratory by technicians using complex optical and electronic equipment.
noun 1. a very thin, flexible glass or plastic strand along which large quantities of information can be transmitted in the form of light pulses: used in telecommunications, medicine, and other fields. optical fiber A flexible transparent fiber of extremely pure glass or plastic, generally between 10 and 200 micrometers in diameter, used especially to […]
- Optical fibre
noun 1. a communications cable consisting of a thin glass fibre in a protective sheath. Light transmitted along the fibre may be modulated with vision, sound, or data signals See also fibre optics communications (fibre optics, FO, US “fiber”, light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used […]