Conformal optical window-based special optical system

Abstract

The invention relates to a conformal optical window-based special optical system. According to the special optical system, fixed-focal length design is adopted, and large-field-of-view imaging is realized; a driving motor is arranged at a variable diaphragm; the driving motor is used for adjusting the aperture of the diaphragm and realizing the transformation of a high-light environment and a dark environment; seven lenses are adopted to construct an optical path; and five kinds of optical materials with different coefficients of chromatic aberration, namely LAF3, ZF6, BAK2, ZK7 and ZK10, are adopted to correct axial chromatic aberration and spherical aberration, and therefore, the imaging quality of the optical system can be improved. With the special optical system of the invention adopted, clear imaging under 10000Lx to 0.01Lx illuminance can be ensured; the correction problem of the axial chromatic aberration and spherical aberration of the front conformal optical window can be solved. The diameter of the whole system is 20mm, the total length of the whole system is 39.7mm, and therefore, the optical system is compact in structure and small in size; the optical system has no aspheric surfaces, the tolerance of the optical system is not sensitive, and therefore, the optical system is easy to assemble; spherical design is adopted, and therefore, costs are low, and process requirements can be greatly reduced; and the variable diaphragm is adopted, and therefore, the optical system can realize clear imaging under wide-range illumination conditions.

Description

technical field [0001] The invention belongs to the field of optical technology and relates to a special optical system based on a conformal light window. Background technique [0002] The development of ordinary visible light lens imaging imaging technology has been quite perfect, but there are various limitations in single application on military aircraft. For example, the space on board is compact, and the lens needs to have a small aperture and a large field of view. The ambient brightness range is extremely large when flying against the sun and at night, and the lens needs to be able to image clearly in bright and dark environments. The most special point is that , the use environment is often inside the aircraft, and the skin of the aircraft is a free-form surface, so the conformal light window in front of the lens will bring certain aberrations. Therefore, designing a special optical system based on the conformal light window can effectively eliminate the aberration ...

AI Technical Summary

Problems solved by technology

[0003] The optical system for correcting the aberration of the conformal light window is usually realized by multiple aspherical lenses; due to the limitation of the bottleneck of the aspheric surface processing technology, most of the current imaging systems for correcting the conformal light window are relatively complicated, which increases the system complexity. Volume, Weight and Dimensions

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