A multi-wavelength lidar optical system design

In view of the needs of large-aperture lidar systems for pollutant detection, a multi-wavelength lidar optical system is theoretically designed. The system is composed of the main receiving system and the optical fiber splitting coupling part. The working wavelength is 355, 532, 1064 nm, and the detection wavelength is 632.8 nm. Chromatic aberration. The clear aperture of the system is Φ680 mm, and the effective focal length is 1548.53 mm. Through the selection of glass material and the distribution of optical power, the corrected relative partial dispersion P and Abbe number V are used to establish achromatic equations, and the PW method is used to solve the initial structure. . Zemax software is used to optimize the optical system that meets the requirements, and the final optimization results are better than λ/15 (λ=632.8nm), indicating that the designed optical system can be used in actual production and processing.