Space target imaging optical system

Abstract

The invention discloses a space target imaging optical system, and belongs to the technical field of space imaging. The technical problems that in the prior art, number of motion components is large, and the space target imaging optical system is, poor in reliability, large in mass and complex in structure are solved. The optical system comprises first lenses, a first lens set, a diaphragm and a second lens set, wherein the first lenses, the first lens set, the diaphragm and the second lens set are sequentially arranged along the same optical axis from left to right, the left surfaces of the first lenses are spherical surfaces, the right surfaces of the first lenses are high-order aspherical surfaces, and the first lenses are made of fused quartz. Aspherical surface coefficients of the high-order aspherical surfaces meet the following formula (please see the figure), wherein z is the vector height of the lenses in the optical axis direction, c is the vertex curvature, k is a quadratic curve constant, y is an axial distance, and at least one of the aspherical surface coefficient D, the aspherical surface coefficient E, the aspherical surface coefficient F and the aspherical surface coefficient G is not zero. On the premise that the large visual field is guaranteed, the optical system has the advantages of being large in relative aperture, small in distortion value, high in reliability and small in size and mass.

Description

technical field [0001] The invention provides a space object imaging optical system, which belongs to the technical field of space imaging. Background technique [0002] The small field of view space target imaging optical system has the problem of small imaging range, so it is necessary to expand its target imaging range. In the prior art, the target imaging range is usually expanded by adding a front scanning mirror. Although this system can expand the target imaging range, due to the addition of the front scanning mirror, the system has many moving parts and poor reliability. [0003] In addition, the working environment of the space target imaging optical system is harsh, and it is vulnerable to shock and vibration, which will cause the internal optical components of the optical system to heat up, resulting in poor imaging quality. In the prior art, this problem is usually solved by setting an additional protective window in front of the optical system for passive therm...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of many moving parts, poor reliability, large quality and large volume in the space target imaging optical system in the prior art, and to provide a space target imaging optical system

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