Close-range off-axis three-mirror collimation system

A three-mirror collimated light, close-range technology, applied in the field of terahertz imaging, can solve the problems of infinite object distance, small effective aperture, and insufficiently compact structure, so as to achieve the effect of convenient reception and improved sensitivity

Active Publication Date: 2020-11-27
欧必翼太赫兹科技(北京)有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a short-distance off-axis three-mirror optical system for the disadvantages of the existing off-axis three-reflective collimation system, such as infinite object distance, small effective aperture, and insufficient compact structure.

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  • Close-range off-axis three-mirror collimation system

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0017] Such as figure 1 As shown, the short-distance off-axis three-mirror collimation system described in the present invention is suitable for 250 GHz terahertz imaging, and includes a scanning pendulum mirror 1, a first mirror 2, a secondary mirror 3, a third mirror 4 and an array detection antenna 5; Wherein, the scanning oscillating mirror 1 is used to scan the object plane light wave, and as the aperture stop of the optical system, it is the entrance of the optical system; the first reflecting mirror 2 is used to receive the light wave from the scanning oscillat...

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Abstract

The invention relates to the technical field of terahertz imaging, particularly relates to a technology for imaging close-range terahertz waves by using an off-axis three-mirror optical lens, and particularly provides a close-range off-axis three-mirror collimation system. The system comprises a scanning swing mirror, a first reflector, a secondary mirror, a third mirror and an array detection antenna, the curvature radius of the scanning swing mirror is infinitely great, the first reflector has a first curvature radius in the sagittal direction, the secondary mirror has a second curvature radius in the meridian direction, and the third mirror is a spherical reflector with a third curvature radius. According to the invention, image splicing can be carried out, small-F-number, large-aperture and high-resolution imaging is realized, a short-distance 1.5-meter object distance is provided, the linear resolution in the sagittal direction can reach up to 10mm, and the temperature detection sensitivity is greatly improved; and the system is suitable for meridian plane and sagittal plane two-dimensional scanning, magnification control is carried out on two different dimensions of an objectplane, an image plane antenna is matched, and collection and detection of light waves of different dimensions are achieved.

Description

Technical field: [0001] The present invention relates to the technical field of terahertz imaging, in particular to the short-range terahertz wave imaging technology using an off-axis three-mirror optical lens, and specifically provides a short-range off-axis three-mirror collimation optical system. Background technique: [0002] Terahertz (THz) refers to electromagnetic waves with a frequency in the range of 0.1-10THz (wavelength 3000-30μm), which is between infrared and microwave, coincides with infrared light in the short wave band, and coincides with millimeter waves in the long wave band. Because its radiation energy penetrates opaque materials such as ceramics, fat, carbon plates, cloth, plastics, etc. to visible light with little attenuation, it is transparent under the irradiation of terahertz waves, and its time-domain spectrum signal-to-noise ratio is very high. High, making terahertz technology very suitable for imaging, for example, it is widely used in aerospace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06G02B26/10G02B5/08G02B5/10
CPCG02B17/0642G02B26/10G02B5/0808G02B5/10
Inventor 张建新李亚飞谭维贤李世龙张殿坤
Owner 欧必翼太赫兹科技(北京)有限公司
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