Ring band free-form surface optical element and monolithic optical system

Abstract

The invention relates to the field of space optics technology, and specifically discloses a ring band free-form surface optical element and a monolithic optical system. The ring band free-form surfaceoptical element of the invention adopts a lens form and includes a first surface and a second surface. Light is transmitted from a transmission band of on the first surface into the optical element,is emergent on a transmission band of the second surface after four reflections inside the optical element, and arrives at an image surface of a detector to complete imaging. Ring band surface forms of the first surface and the second surface of the optical element are subjected respectively to high-precision fitting with low-order XY polynomials, the ring band free-form surface forms can be ensured to realize integrated machining detection, the structure is simple and the processing difficulty is reduced. In the invention, the monolithic ring band free-form surface optical element is used toform the monolithic optical system, the off-axis field of view aberration and color aberration of the system are corrected, and an extremely miniaturized and lightweight system is realized.

Description

technical field [0001] The invention relates to the technical field of space optics, in particular to an annular free-form surface optical element and a monolithic optical system for target detection of aircraft. Background technique [0002] At present, the space detection optical system for obtaining high-definition photos in the fields of aviation and aerospace reconnaissance and detection generally adopts ring-shaped aspheric surfaces with different radii of curvature. Surface relative distance, eccentric inclination, etc. Using a single-piece free-form prism solution, although the center is avoided, under the same index parameters and optical element material conditions, the volume and weight of the system are 1.3 to 1.6 times that of the coaxial solution, and the current free-form prism is difficult to process and detect larger. [0003] In order to overcome the above shortcomings, a new ring-shaped free-form optical element and a monolithic optical system are design...

AI Technical Summary

Problems solved by technology

[0002] At present, the space detection optical system for obtaining high-definition photos in the fields of aviation and aerospace reconnaissance and detection generally adopts ring-shaped aspheric surfaces with different radii of curvature. Surface relative distance, eccentric inclination, etc.

Using a single-piece free-form prism solution, although the center is avoided, under the same index parameters and optical element material conditions, the volume and weight of the system are 1.3 to 1.6 times that of the coaxial solution, and the current free-form prism is difficult to process and detect bigger

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