Ultra-wideband terahertz Brewster vacuum window and production method thereof

A Brewster and vacuum window technology, applied in the direction of instruments, installations, light guides, etc., can solve the problems of difficult production, complex structure, high cost, etc., and achieve the effects of cheap price, uniform stress distribution, and increased success rate

Active Publication Date: 2016-11-23
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of complicated structure, difficult actual manufacture and high cost in the prior art, especially to solve the demand for ultra-broadband vacuum sealing in the terahertz band a

Method used

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  • Ultra-wideband terahertz Brewster vacuum window and production method thereof
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  • Ultra-wideband terahertz Brewster vacuum window and production method thereof

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Embodiment Construction

[0029] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.

[0030] Such as figure 1 As shown, the Brewster vacuum window of the present invention in this embodiment includes: a flange 1, a cylindrical waveguide 2, a window support frame 3, and a circular window 4; wherein, the round port 21 of the cylindrical waveguide is welded on the flange 1 , the other end of the cylindrical waveguide has an elliptical section 22, and the elliptical section forms a Brewster angle with the circular surface of the cylindrical waveguide; the window support frame 3 is welded on the elliptical section of the cylindrical waveguide; the circular support frame 3 is welded window 4; as figure 2As shown, the window support frame includes an elliptical bottom surface 31, a circular groove 32, a through hole 33 and an annular step 34; the elliptical bottom surface 31 is flat, and the outer edge is consistent with the sha...

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Abstract

The invention discloses an ultra-wideband terahertz Brewster vacuum window and a production method thereof. The ultra-wideband terahertz Brewster vacuum window adopts a window plate supporting frame, wherein the window plate supporting frame comprises an elliptical bottom surface and a circular groove; through the elliptical bottom surface, an elliptical section of a cylindrical waveguide is welded, and through the circular groove, a circular window plate is welded, so that electromagnetic wave is propagated from the cylindrical waveguide to the circular window plate; during welding of the circular window plate, stress distribution is relatively uniform, and when the circular window plate is welded with the window plate supporting frame, the influence of stress can be reduced to avoid cracking; a rectangular through hole is formed in the window plate supporting frame, and the influence of the stress can be reduced when a passing condition of the wave is met, so that welding success rate is greatly increased; the structures are connected in a welding manner so as to meet a sealing vacuum requirement; the thickness of the circular window plate meets a requirement that reflected wave and the re-refracted wave are counteracted with each other, so that the transmission efficiency is improved; the ultra-wideband terahertz Brewster vacuum window can achieve ultra-wideband transmission of the electromagnetic wave within a terahertz wave band, has good vacuum sealing performance, and has the advantages of easy production and low price.

Description

technical field [0001] The invention relates to the field of broadband vacuum output windows, in particular to an ultra-wideband terahertz Brewster vacuum window and a preparation method thereof. Background technique [0002] When natural light is reflected and refracted on the dielectric interface, the reflected light and refracted light are generally partially polarized light. Only when the incident angle is a certain angle, the reflected light is linearly polarized light, and its vibration direction is perpendicular to the incident surface. The specific angle is called Brewster's angle. The reflected light and the reflected light path are on the same plane (called the incident plane), and the polarized light parallel to this plane is P polarized light (TM mode), and the polarized light perpendicular to this plane is S polarized light (TE mode) . When both P-polarized light and S-polarized light are incident at Brewster's angle, all P-polarized light is transmitted. [...

Claims

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Application Information

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IPC IPC(8): G02B6/00G02B7/00
CPCG02B6/00G02B7/00
Inventor 杜朝海姬晓黄斌刘濮鲲
Owner PEKING UNIV
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