Long-Range Collimator Translate the following content into English: The fiber optic transmission beam is subjected to large-beam collimation and shaping, and is used for high-power, long-distance transmission, and pulse-type laser output. Within the operating distance, the beam has good collimating effect, with uniform energy distribution, distinct and clear edges. During the design, an air-spaced lens series is selected to accommodate single-mode and multimode fibers, as well as large core fibers, to achieve laser telemetry sensing, illumination, interference and other functions.