Two-color optical system with ultra-large vision field and large aperture

Abstract

The invention belongs to the technical field of optical instruments, and relates to a two-color optical system with ultra-large vision field and large aperture which comprises a single negative reflector, a signal positive reflector, a single positive reflector, an aperture grating, a negative lens containing aspheric surface, a single positive lens, protective window glass, a beam splitter mirror and a detector image plane. The two-color optical system has the maximum vision field of 130 degrees, has large relative aperture and minimum number F of 1.5, and adopts an off-axis structure for avoiding energy sheltering loss and being beneficial for energy detection. The former three reflectors of the system are all aspheric surfaces, which can be directly machined by a diamond lathe. The aspheric surfaces all adopt optical glass material which is easy to machine for checking image difference. The two-color optical system has excellent image forming quality and simple structure, can better suppress stray lights, can be applied in the fields of aviation, the reconnaissance and observation of infrared, ultraviolet double-spectral coverage and large vision field on the ground after beingsplit by the beam splitter mirror, and can also be applied to optical detection instruments additionally.

Description

Super large field of view, large aperture two-color optical system technical field The invention belongs to the technical field of optical instruments, and relates to an optical system with a large field of view and a large aperture mixed with infrared and ultraviolet bispectral bands, which is especially suitable for focal plane imaging or energy detection of special bispectral bands. Background technique At present, the mixed light optical system with large field of view, large aperture and high transfer function value (MTF) using ultraviolet and infrared focal plane photoelectric array detectors as imaging receivers, whether in aerospace, aviation and ground reconnaissance, target tracking and detection Among them, they can obtain wide-spectrum high-definition photos and more target spectrum information that cannot be compared with conventional lenses, and can be widely used in the fields of national defense and military industry, so they are favored by national defense ...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problems of reducing the volume and weight of the system and reducing the difficulty of obtaining and processing optical elements under the condition of obtaining a large field of view, and propose a two-color optical system with a super large field of view and a large aperture

Images