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Electrically adjustable Cassegrain reflection system based on metasurface

A reflection system and metasurface technology, applied in instruments, telescopes, optics, etc., can solve the problems of non-adjustable focal length, inconvenient installation and adjustment, etc., and achieve the effect of solving difficult preparation and flexible installation and adjustment.

Active Publication Date: 2019-09-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide an electrically adjustable Cassegrain reflection system based on metasurfaces, aiming to solve the problem of inconvenient installation and adjustment due to the non-adjustable focal length of the traditional Cassegrain reflection telescope system question

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  • Electrically adjustable Cassegrain reflection system based on metasurface
  • Electrically adjustable Cassegrain reflection system based on metasurface
  • Electrically adjustable Cassegrain reflection system based on metasurface

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] figure 1 is a side view of a traditional Cassegrain reflector telescope system. Such as figure 1 As shown, the Cassegrain reflection system includes a curved primary mirror 10 and a curved auxiliary mirror 20. The curved auxiliary mirror 20 is aligned with the opening on the primary mirror 10, and the incident light is reflected from the curved primary mirror 10 to the curved auxiliary mirror 20. On the surface, it is reflected by the curved secondary mirror 20 and passes through the opening of the curved primary mirror 10 to point A. The traditional Cassegrain reflective system needs to ...

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Abstract

The present invention discloses an electrically adjustable Cassegrain reflection system based on metasurface, which comprises a main mirror and an auxiliary mirror. The auxiliary mirror comprises: a flexible diaphragm, a first metal reflecting layer and electrodes. The first metal reflecting layer is located above the flexible diaphragm for reflecting and focusing the incident light reflected on the auxiliary mirror by the main mirror. The electrodes are connected between the flexible diaphragm of the auxiliary mirror and the main mirror. The flexible diaphragm is bent under the adjustment of the voltage between the electrodes, and the distance between the auxiliary mirror and the main mirror is changed to adjust the focus position. The main mirror comprises a second metal reflecting layer, a dielectric layer and a main mirror metasurface functional unit pattern. The main mirror metasurface functional unit pattern meets the phase distribution of the main mirror in order to reflect the external incident light onto the auxiliary mirror of the reflection system and realize reflection focusing through the auxiliary mirror of the reflection system. According to the invention, the first metal reflecting layer moves up and down to change the focusing position of the reflected light after the reflected light passes through a light transmission hole on the emitting metasurface main mirror so that the installation and adjustment of the Cassegrain reflection system is more flexible.

Description

technical field [0001] The invention belongs to the field of Cassegrain reflection systems, and more specifically relates to an electrically adjustable Cassegrain reflection system based on a metasurface. Background technique [0002] The Cassegrain system consists of a lens and two mirrors, and has the characteristics of large aperture, long focal length, and multi-band. Larger terminal equipment can be placed at the focal point of the Cassegrain telescope without blocking light. For a telescope with a main focus system, a Cassegrain system and a folding axis system, the relative aperture of the Cassegrain telescope is medium, and it is suitable for photography and other work with medium light power and large scale, such as comparison Large spectroscopic observation, direct photography, image enhancement photography, infrared observation and correction of optical axis of multi-sensing photoelectric system, etc. The invention provides an electrically adjustable Cassegrain ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B23/02G02B26/08
CPCG02B1/002G02B23/02G02B26/0825
Inventor 易飞周仑陈逸堃
Owner HUAZHONG UNIV OF SCI & TECH
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