Abstract: In order to expand the detection field of view angle range of solar-blind ultraviolet optical system used in these fields of high voltage corona discharge detection, tactical missile alarm system and so on, based on the anti-remote structure form, two negative crescent lenses are added in front of the paraxial optical lens, and the full of field of view of solar-blind ultraviolet optical system is achieved up to 100°; and then gives a method of applying Gaussian optics and third-order aberration theory to determine the first-order optical parameters of three lenses of conventional optical lens, and then applying optical design software to design a transmission solar-blind ultraviolet optical system with ultra-wide angle. The operating band of the optical system is 240-280 nm, F number is 4, focal length is 1.0 mm; the five lenses of the system all adopt the fused quartz optical materials and no aspheric, which greatly reduces the complexity and the processing manufacture cost. In addition, the value of modulation transfer function in the full of field of view is higher than 0.42 at the Nyquist frequency of 20lp/mm, the relative illumination is more than 97.9% and energy loss is very small, and thus the imaging quality is very good and has a good practical application prospect; it can provide an effective guide method for the parameters of initial structure and design of this kind of optical systems.

Key words: optical design, ultra-wide angle, solar-blind ultraviolet, transmission, aberration optimization