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Interactive device for the selective control of electromagnetic radiation

A technology of electromagnetic radiation and selectivity, applied in the field of electromagnetic radiation, can solve the problem of not being able to select specific areas of electromagnetic radiation, and achieve the effect of improving visual comfort and improving optical performance

Inactive Publication Date: 2017-05-10
POLITECNICO DI MILANO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device cannot select specific areas of electromagnetic radiation

Method used

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  • Interactive device for the selective control of electromagnetic radiation
  • Interactive device for the selective control of electromagnetic radiation
  • Interactive device for the selective control of electromagnetic radiation

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Embodiment Construction

[0028] The device according to the invention uses two non-uniform anisotropic polarizers of the "wire grid" type. Through calculation and design of specific nanoscale patterns, the present invention solves the problem of selective and dynamic shielding of solar radiation.

[0029] Polarizers of the "wire grid" type used in the present invention are known to experts in the field. Reference may be made to the general technical literature. Examples are described in JP-2012155163, US2008316599 and US20050128587.

[0030] The device according to the invention enables two polarizers to be placed continuously along the path of the direction of propagation of the electromagnetic radiation, and these polarizers, when subjected to a linear translational movement in a direction opposite to the designed main direction, make it possible for the polarizers to be designed for The range of solar radiation can be selectively transmitted and reflected, eliminating the problem of overheating o...

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PUM

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Abstract

The present invention relates to the technical field of systems for the polarisation of electromagnetic radiation, particularly light radiation, and more particularly solar radiation. The present invention also relates to the application of such systems to the dynamic screening of essentially transparent surfaces, particularly in the building construction, automotive, architecture and interior design sectors and other sectors that require such screening. The present invention describes a transparent multilayer device comprising two polarisers of the nano-structured, selective, passive and non-uniform "wire grid" type, the said polarisers being arranged in succession along the path of the direction of propagation of the electromagnetic radiation and each of the said polarisers being capable of performing a linear translatory motion with respect to one another, where the pitch between the filaments is constant and less than 390 nm, the said filaments occupy an essentially constant space between 2.5% and 50% of the pitch period, the said filaments are organised in parallel bands of regular shape, the said bands are of the same dimensions but have different orientations of the polarisation axis, where the polarisation axis of each band is rotated clockwise or anti-clockwise, with respect to that of the adjacent bands, through constant angles selected in the range between tenths of a degree and 45 degrees.

Description

technical field [0001] The invention relates to the technical field of systems for the polarization of electromagnetic radiation, in particular optical radiation, and more particularly solar radiation. [0002] The invention also relates to the use of such a system for the dynamic shielding of substantially transparent surfaces, in particular in the building construction, automotive, architectural and interior design industries and other industries requiring such shielding. Background technique [0003] Modern architectural structures involve the extensive use of large glazed surfaces. These surfaces have an aesthetic function derived from the architectural design and are also intended to illuminate the interior environment. [0004] However, the use of these surfaces is not without problems and disadvantages. In winter, glass surfaces are less insulating and dissipate more heat than the building's opaque brick structure. This requires greater energy consumption to proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E06B9/24G02B5/20G02B27/28
CPCE06B9/24G02B5/204G02B27/281E06B2009/2464B82Y20/00B82Y30/00G02B5/208G02B5/3058E06B2009/2417
Inventor 尼古拉·莱瓦蒂
Owner POLITECNICO DI MILANO
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