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A short-distance off-axis three-mirror collimation system

A three-mirror collimation and short-distance technology, applied in the field of terahertz imaging, can solve the problems of infinite object distance, small effective aperture, and insufficient compact structure, and achieve the effect of convenient reception and improved sensitivity

Active Publication Date: 2022-05-10
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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  • A short-distance 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 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, which includes a scanning pendulum mirror, a first Reflecting mirror, secondary mirror, three mirrors and array detection antenna, the radius of curvature of the scanning pendulum mirror is infinite, the first reflecting mirror has a first radius of curvature in the sagittal direction, and the secondary mirror has a second radius of curvature in the meridional direction. radius of curvature, the three mirrors are spherical reflectors with a third radius of curvature. The invention can carry out image splicing, realize small F number, large aperture, and high-resolution imaging, and has a close object distance of 1.5 meters, so that the line resolution in the sagittal direction can be as high as 10 mm, and the temperature detection sensitivity is greatly improved; it is suitable for Two-dimensional scanning of the meridional plane and sagittal plane, control the magnification of two different dimensions of the object plane, and match the image plane antenna to realize the collection and detection of light waves in different dimensions.

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 Patents(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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