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On-line verification method for processing cassegrain two-mirror optics system

A Cassegrain double mirror and optical system technology, which is applied in the direction of optical instrument testing, optical performance testing, measuring devices, etc., can solve problems such as online inspection, and achieve the effect of ensuring processing quality

Inactive Publication Date: 2008-08-27
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a processing online inspection method of the Cassegrain system to solve the problem of online inspection when the main and secondary mirrors of the Cassegrain system are paired and processed with imperfect images on the axis.

Method used

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  • On-line verification method for processing cassegrain two-mirror optics system
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  • On-line verification method for processing cassegrain two-mirror optics system

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Embodiment Construction

[0013] According to attached figure 1 The processing and inspection optical path diagram of the sub-mirror 201, we designed a paired processing and inspection optical path for a Cassegrain two-mirror optical system 2 with an on-axis point imperfect imaging. The optical parameters of this Cassegrain two mirror optical system 2 are shown in Table 1:

[0014] Table 1

[0015]

[0016] The inspection light path design is as follows:

[0017] The standard self-collimating plane mirror 1 adopts a plane mirror with a diameter of 250mm and a surface accuracy of one-tenth of the wavelength; the compensation lens 3 adopts BK7 optical glass, and the specific optical design parameters are shown in Table 2:

[0018] Table 2

[0019]

[0020] After the compensation lens 3 is added, the Cassegrain two-mirror optical system forms a perfect image on the 2-axis point, and the wave aberration of the point on the axis is close to one-fiftieth of the wavelength; the detection instrument 4...

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Abstract

The invention discloses an online test method for the processing of a Cassegrain two-reflector optical system, which is used for the online test of the processing of the non-perfect imaging Cassegrain two-reflector optical system. The optical test system consists of a standard self-collimating plane mirror, the tested Cassegrain optical system, a compensating lens and an aspheric processing surface form detection instrument. The compensating lens is arranged on the back light path of the non-perfect imaging Cassegrain two-reflector optical system to compensate the spherical aberration of the original optical system, thereby enabling the tested Cassegrain two-reflector optical system to form a perfect image on points on the axis, and meeting the processing requirements of the pair of primary and secondary reflectors.

Description

technical field [0001] The invention relates to an optical processing inspection technology, in particular to an on-line inspection method for processing a Cassegrain double-mirror optical system, which is used for on-line inspection during processing of an imperfect imaging Cassegrain double-mirror optical system. Background technique [0002] In 1672, Cassegrain invented an optical system with two mirror structures. This optical system is widely used in astronomical telescopes and various long-focus telescopic objectives. The largest mirror in the Cassegrain optical system is called The main reflector, the small one is called the secondary reflector, usually has a hole in the center of the main reflector, and the image is imaged behind the main reflector. In the classic Cassegrain telescope, the primary reflector is a paraboloid of revolution. According to the optical properties of conic curves, as long as the secondary reflector is F 1 , F 2 is the rotating hyperboloid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00G01M11/02
Inventor 沈蓓军
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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