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A secondary mirror assembly that reduces the blocking ratio

A technology of obscuration ratio and secondary mirror, which is applied in the direction of optical components, instruments, installation, etc., can solve the problem of destroying the plane structure on the back of the secondary mirror, and achieve the effects of easy installation and adjustment, stable and reliable overall structure, and easy processing

Active Publication Date: 2020-11-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

To solve this problem, the back support scheme can also be adopted, that is, three cylindrical holes are opened on the back of the mirror, and the secondary mirror is fixed through flexible joint connections; or a circular boss is processed in the center of the back of the secondary mirror, and supported by bonding ; but the existing back support scheme needs to be processed on the back of the secondary mirror, which destroys the plane structure of the back of the secondary mirror

Method used

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  • A secondary mirror assembly that reduces the blocking ratio
  • A secondary mirror assembly that reduces the blocking ratio
  • A secondary mirror assembly that reduces the blocking ratio

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Embodiment Construction

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] see Figure 2 to Figure 4 , a secondary mirror assembly 100 that reduces the obscuration ratio provided by the present invention includes a secondary mirror 10, a mirror housing 20 and a pressure ring 30, and the secondary mirror 10 includes a front end 11 and a rear end 12 connected to one side of the front end 11 The front end 11 is a structure of revolution and includes a first optical surface 111; the rear end 12 is a cylinder and coaxially arranged...

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Abstract

A secondary mirror assembly for reducing the obscuration ratio, including a secondary mirror, a mirror housing and a pressure ring, the secondary mirror includes a front end and a rear end connected to one side of the front end; the front end is a rotary structure and includes a first optical surface; the rear end is a cylinder body and coaxial with the front section, the diameter of the rear end is smaller than the diameter of the front end and includes a second optical surface opposite to the first optical surface and a cylinder side connecting the second optical surface and the front end; the cylinder side is recessed to form at least two positioning grooves; The mirror housing is hollow cylindrical and the inner diameter is equal to the diameter of the rear end. The inner surface of the mirror housing protrudes and extends with positioning bosses corresponding to the positioning grooves one by one; One by one is accommodated in the positioning groove; the pressure ring is an annular ring with an outer diameter corresponding to the inner diameter of the mirror housing, and the pressure ring is accommodated in the mirror housing and abuts against the second optical surface. The invention minimizes the central blocking ratio, has a stable and reliable overall structure, is easy to process, and is easy to assemble and adjust.

Description

technical field [0001] The invention relates to the technical field of secondary mirrors applied to coaxial optical systems such as coaxial telescopic systems and camera systems, in particular to a secondary mirror assembly that reduces the blocking ratio. Background technique [0002] A coaxial optical system generally includes a primary mirror assembly and a secondary mirror assembly coaxial with the primary mirror assembly. The coaxial optical system has a greater competitive advantage due to its simple structure, stability and reliability, and easy assembly and adjustment. However, the secondary mirror assembly Central obscuration has always been an inevitable defect of coaxial optical systems, so how to minimize the obscuration ratio is a difficult point that designers in coaxial systems have been exploring and striving to overcome. Improvements to the support structure for the secondary mirror are included in the many existing exploration proposals. Since the typical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02
CPCG02B7/02G02B7/026
Inventor 郭疆李元鹏朱磊齐洪宇龚大鹏王浩
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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