(computing) a type of computer mouse that uses light-emitting and -sensing devices to detect where it is
Any kind of mouse that uses visible light or infrared to detect changes in its position.
noun 1. the path of light through a medium, having a magnitude equal to the geometric distance through the system times the index of refraction of the medium.
noun 1. a film printer used in making optical effects, consisting basically of a camera that photographs the image with special lenses to enlarge, reduce, distort, etc., and a projector that transfers the image to the print stock, as distinguished from a contact printer.
noun, Physics, Optics. 1. 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