Design of collimating optical system for high power array LED

At present, LED is widely used as an illumination source. Because its spatial intensity is similar to lambertin distribution, the divergence angle of the beam is large, so that the light intensity of the LED source is rapidly attenuated as the propagation distance increases. Increasing the power of the LED light source will cause many LEDs to be packaged into a larger area chip, so that it is difficult to solve the beam uniformization and the collimated light by using a general collimating optical lens. In this paper, a collimated light system based on LED light source array is designed, which can produce a beam of collimated light from the high-power large-area LED, and low chromatic aberration occurs in the optical system. Such a light source optical system can be used as a super power parallel light source of many optical instruments such as an LED light source projector, a high power spotlight, a photographic illumination light source and the like. In the paper, optical design software zemax is used to optimize and design the optical lenses.