Complete collection of beam details (photographic terminology)

A group of lights with a certain relationship guāng shù[ beam space. Divided into concentric beams and parallel beams.

Chinese name: beam mbth: [light beam] Pinyin: guāng shù Classification: concentric light beam and parallel light beam concentric light beam, parallel light beam and concentric light beam concentric light beam consists of light emitted from a light emitting point; It corresponds to spherical waves. Parallel beam A parallel beam is a beam emitted by a luminous point at infinity, corresponding to a plane wave.