Large-aperture off-axis optical system and passive athermal method

An optical system and large-aperture technology, applied in the direction of optics, optical components, installation, etc., can solve the problems of increasing the volume, weight and cost of the system, and achieve the effect of simple installation

Active Publication Date: 2014-11-26
11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a large-diameter off-axis optical system and a passive athermalization method to solve the

Method used

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  • Large-aperture off-axis optical system and passive athermal method
  • Large-aperture off-axis optical system and passive athermal method
  • Large-aperture off-axis optical system and passive athermal method

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Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, a large-aperture off-axis optical system includes: a displacement compensation mechanism 1, a secondary mirror chamber 2 with a parabolic secondary mirror 3 installed, a connecting frame 4, a primary mirror frame 5, and a primary mirror with an ellipsoidal primary mirror 6 installed Mirror chamber 7; the bottom of the displacement compensation mechanism 1 and the secondary mirror chamber 2 (the direction is the same as that shown in the accompanying drawing, the upper part of the secondary mirror chamber 2 is equipped with a secondary mirror 3, and the bottom of the secondary mirror chamber 2 faces away from the secondary mirror The upper part of chamber 2) is fixedly connected, the primary mirror frame 5 is fixedly connected with the primary mirror chamber 7, and the primary mirror frame 5 and the secondary mirror chamber 2 are connected by the connecting frame 4; the parabolic secondary mirror 3 and the ellipsoidal primary mirror 6 a...

example

[0045] Table 2

[0046]

[0047] The data in Table 2 is calculated based on the above interval compensation formula. The displacement compensation mechanism 1 prepared by using a 64mm aluminum block can fully compensate the system interval caused by temperature. It effectively guarantees that the image quality of the system does not change with temperature.

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Abstract

The invention discloses a large-aperture off-axis optical system and a passive athermal method. The large-aperture off-axis optical system comprises a displacement compensation mechanism, a secondary mirror chamber with a secondary mirror, a connection framework, a primary mirror framework and a primary mirror chamber with a primary mirror. The displacement compensation mechanism is fixedly connected with the bottom of the secondary mirror chamber, the primary mirror framework is fixedly connected with the primary mirror chamber, and the primary mirror framework is connected with the secondary mirror chamber through the connection framework. According to the large-aperture off-axis optical system, the displacement compensation mechanism is arranged and can completely compensate a system interval caused by temperature, it is effectively guaranteed that image quality of the system does not change with temperature, the system is easy to install, and the size, the weight and cost are not increased on the basis of an original system.

Description

technical field [0001] The invention relates to the field of reflective optical systems, in particular to a large-diameter off-axis optical system and a passive adiabatic method. Background technique [0002] At present, optical systems working in complex environments have to withstand very large environmental temperature changes, typically up to -20°C to +60°C. In an environment with rapid temperature changes, the optical system will change the focal length, image plane position, and image plane quality due to thermal instability of optical materials and structural materials. The transmission optical system uses passive and active methods to eliminate thermal effects, and the technology development is relatively complete, and it is widely used in equipment. With the development of technology and the need for long-distance effects, the athermalization and athermalization technologies of large-aperture off-axis reflective optical systems have gradually been paid attention to...

Claims

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Application Information

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IPC IPC(8): G02B7/182G02B7/185
Inventor 刘琳李松山张海武王岳张文海
Owner 11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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