High-precision adjustment method for large-aperture optical lens group

A technology of optical lens and assembly method, which is applied in the field of telescope structure, can solve problems such as increased difficulty in optical lens assembly, decreased surface shape accuracy, and coaxial error, and achieves high application value and innovative effects

CN114660754APending Publication Date: 2022-06-24CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-06-24

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Abstract

The invention belongs to the technical field of telescope installation and adjustment methods, and particularly relates to a high-precision installation and adjustment method for a large-aperture optical lens group. The invention provides a high-precision installation and adjustment method for a large-aperture optical lens group, and the method comprises the following steps: S1, completing the installation and adjustment of at least two single lenses and corresponding lens bases, and forming a plurality of single lens assemblies; and S2, integrating the plurality of single lens assemblies in the step S1 to form a lens group. According to the adjustment method provided by the invention, the adjustment and detection of each lens can be realized on the premise of ensuring the surface shape precision of the mirror surface, the optical lens group can reach the optimal state, and compared with a traditional method, the method has relatively high application value and innovativeness.
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Description

technical field

[0001] The present application relates to the technical field of telescope structures, in particular to a high-precision adjustment method for a large-diameter optical lens group. Background technique

[0002] In order to meet the needs of large-scale time-domain sky surveys, galaxy measurements, dark matter and dark energy detection, and extrasolar planetary searches, many large-field telescopes have been built in the world, such as the Japan Observatory’s 8.2m Subaru telescope, wide-field telescope The Dark Energy Spectrometer (DESI), the 8.4-meter-diameter coaxial three-mirror large-field telescope LSST, the two 2-meter telescopes PS1 and PS2 of the Pan-STARRS project of the Pan-STARRS, the Xinglong Observation Base 2.16-meter telescope, etc. In order to achieve a large relative aperture and a large field of view, one of the main features of the above telescope is that it adopts an optical system in the form of a main focus, and an optical lens with a very...

Examples

Embodiment 1

[0058] The method of the present invention is proposed based on the discrete multi-point flexible support structure for large-diameter optical lenses. The discrete multi-point flexible support structure for large-diameter optical lenses is such as figure 2 As shown, several indium steel pads 203 are uniformly bonded around the lens, each indium steel pad 203 is provided with a plurality of threaded holes, and is connected between the indium steel pad 203 and the mirror base 201 through a plurality of discrete flexible support units 204 , realizes the connection between the lens 202 and the lens holder 201 and forms an independent lens assembly, and each flexible support unit 204 has multiple directions of flexibility to adapt to the influence of structural deformation or thermal deformation on the mirror surface shape accuracy. The support structure described here does not refer to a specific lens, but a general structural form.

[0059] After each lens and the mirror group f...