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Midpoint infrared band double-bandpass optical window electromagnetic shielding structure

An electromagnetic shielding structure, infrared band technology, applied in the fields of magnetic/electric field shielding, optics, optical components, etc., can solve the problem of inability to identify invisible units, and achieve the effect of strong electromagnetic shielding

Inactive Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the technical deficiency that the electromagnetic shielding structure of the single-bandpass optical window in the infrared band cannot identify invisible units with high absorption rates for specific wavelengths in the detection field, and design a new type of optical window with passbands in two different wavelength ranges. Window electromagnetic shielding structure

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  • Midpoint infrared band double-bandpass optical window electromagnetic shielding structure
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Embodiment Construction

[0021] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0022] In the present invention, the plane incident light of 1--14 μm is used as the incident light source to explore the band-pass characteristics of the structure in the infrared band.

[0023] In the implementation example of the present invention, the electromagnetic shielding structure of the mid-point infrared band double-bandpass optical window is composed of a substrate 1, a metal film 2, a small resonant circle 3, and a large resonant ring 4, wherein the array period of the large resonant ring 4 is small 2 times the period of the resonant circle 3 arrays. The small resonance circle 3 and the large resonance ring 4 have a common center. The direction of the large resonant circular ring is the same as that of the small resonant circular array.

[0024] The outer radius of the large resonance ring 4 is 1.8 μm, and the inner radius is 1.3...

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Abstract

The invention discloses a midpoint infrared band double-bandpass optical window electromagnetic shielding structure and belongs to the field of anti-electromagnetic interference of multimode detectors. The midpoint infrared band double-bandpass optical window electromagnetic shielding structure comprises a base, a metal thin film, small resonant circles and large resonant circles as periodic units, wherein the large resonant circles are periodically arrayed at 60 degrees; the circle center of each small resonant circle is located on a midpoint of a connection line of the circle centers of two adjacent large resonant circles; and the diameters of the small resonant circles are greater than the differences between the outer diameters and the inner diameters of the large resonant circles. Double-infrared bandpass filtering and wide-band electromagnetic shielding functions are simultaneously achieved.

Description

technical field [0001] The invention belongs to the technical field of anti-electromagnetic interference of multi-mode detection instruments, and relates to an electromagnetic shielding structure of a midpoint infrared band double-bandpass optical window. Background technique [0002] At present, how to effectively shield the external electromagnetic interference without affecting the normal operation of the optical detector is an important problem. For this problem, the traditional method is to use the optical window electromagnetic shielding technology to realize the bandpass of the infrared band. The disadvantage of this method is that the photodetector device can only emit electromagnetic waves of a specific band for detection, and cannot detect objects shielded by certain bands. . The electromagnetic shielding structure of the mid-point infrared band double-bandpass optical window overcomes this disadvantage to a certain extent, so that the photodetector can emit elect...

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Application Information

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IPC IPC(8): H05K9/00G02B5/20
CPCH05K9/0058G02B5/204
Inventor 谭久彬刘永猛周子涵
Owner HARBIN INST OF TECH