Hartmann focusing lens for active optics

Abstract

The invention discloses a Hartmann focusing lens for active optics, belongs to the technical field of active optics detection of larger-aperture telescopes and aims to solve the problem of failure in quick positioning and accurate stopping in the prior art. The Hartmann focusing lens comprises a front group lens unit, a rear group lens unit and a focusing unit coaxially arranged in the position where the front group lens unit and the rear group lens unit are connected, wherein the focusing unit comprises a focusing lens base, a focusing lens pressing ring, a focusing nut and a focusing lens, the focusing lens is coaxially fixed in the cylindrical focusing lens base through the focusing lens pressing ring, the outer wall of the focusing lens base is in thread fit with the focusing nut, end surfaces of two ends of the focusing nut are contacted with end surfaces of a front group lens cone and a rear group lens cone respectively, two ends of the focusing lens base are in transition fit with inner holes of the front group lens cone and the rear group lens cone respectively, guide grooves are formed in corresponding positions of the focusing lens base and a guide screw, one end of the guide screw is in sliding fit with the corresponding guide groove, and the focusing nut is rotated to drive the focusing lens base to reciprocate axially.

Description

technical field [0001] The invention belongs to the technical field of active optical detection of large-diameter telescopes, and in particular relates to an active optical Hartmann focusing lens. Background technique [0002] With the increase of the telescope aperture, new requirements are put forward for the image quality of the optical system. As a new measurement method, active optics obtains the wavefront phase information by measuring the wavefront slope, and adjusts the primary mirror in real time through feedback. system. As a part of the active optics, the Hartmann focusing lens has the following specific functions: (1) to meet the dynamic range and sampling frequency of the Hartmann camera; (2) to realize the magnification adjustment of the optical system. At the same time, a microlens array is installed to match the pupil imaging with the microlens array. [0003] Active optics is the core technology of large-aperture telescope detection. It can adjust its samp...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an active optical Hartmann focusing lens, which solves the problem of being unable to quickly locate and accurately dock in the prior art, and realizes the adjustment of the focal length of the Hartmann camera through a simple and easy-to-control mechanical structure. At the same time, it avoids the focusing error caused by the imprecise machining of the cam

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