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Device for concentrating optical radiation

A technology of light radiation and plane concentrating, applied in heating devices, solar thermal devices, optics, etc., can solve the problems of high manufacturing cost, high absorption loss, and difficulty in manufacturing, and achieve the effect of simple design and manufacturing and low energy loss

Inactive Publication Date: 2002-07-10
TERRASUN LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is that there are a lot of reflection losses in the guide plate and high absorption losses in some more economical embodiments
The invention also has the problem of being optically difficult to manufacture and thus expensive to manufacture

Method used

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  • Device for concentrating optical radiation
  • Device for concentrating optical radiation
  • Device for concentrating optical radiation

Examples

Experimental program
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Effect test

example example 1

[0125] Films comprising multiplexed (angular, spectral and spatial) holographic films bonded to low-iron glass panels have been fabricated with large acceptance angles. A gelatin holographic film was coated on a 3 mm thick low iron glass (Solarphire glass) flat plate. Holographic optical elements were recorded in the film using an argon-ion laser with a wavelength of 488 nm. This film panel was then bonded to another 3 mm thick low iron glass panel (Solarphire glass) using Springborn Laboratories EVA adhesive. EVA is an adhesive commonly used in the construction of photovoltaic modules. The photovoltaic cells were then bonded to the rear surface of the glass using NOA61 optical adhesive. The rear surface of the battery is then protected by gluing a thin aluminum plate to the back of the battery using conventional 3M high-adhesive double-sided tape. The device measured 6 inches by 9 inches. The PV cells are 1 inch wide and 4 inches long. The holographic area extends beyond t...

example 2

[0126] A two-layer holographic film laminate was constructed in the same manner as described in Example 1, with the only difference being that the additional holographic film layer was applied to the second glass. Due to the difference in HOE, the two thin film layers concentrate energy from different parts of the solar spectrum. The combined stack of two thin films forms an angular and spatial multiplexing device for concentrating solar energy over a wide range of incident angles. The first film focuses energy in the visible part of the spectrum (approximately 400 to 700 nm), and the second hologram focuses energy in the infrared (approximately 700 to 1100 nm). The peak diffraction efficiency was 65%. The electrical conversion efficiency of the device was measured to be 6.1%. The device gathers energy from the 160° diurnal angular variation and the 45° seasonal variation in the angle of incidence.

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Abstract

A holographic planar concentrator (HPC) (10') for collecting and concentrating optical radiation is provided. The holographic planar concentrator (10') comprises a planar highly transparent plate (12, 12') and at least one multiplexed holographic optical film (14, 14') mounted on a surface thereof. The multiplexed holographic optical film (14, 14') has recorded therein a plurality of diffractive structures having one or more regions (14, 114, 214) which are angularly and spectrally multiplexed. Two or more of the regions (14, 114, 214) may be configured to provide spatial multiplexing. The recording of the plurality of diffractive structures is tailored to the intended orientation of the holographic planar concentrator (10') to solar energy. At least one solar energy-collecting device (30), such as a photovoltaic cell, is mounted beneath said holographic optical film (14, 14'). The optical radiation is guided within the plate by the holographic film (14, 14') and total internal reflection to be concentrated on the solar energer collecting device (30).

Description

technical field [0001] The invention relates to optical devices, in particular to the field of light concentrators for condensing optical radiation. A concentrator produced according to the subject matter of the invention can be used in all technical fields in which condensed optical radiation is utilized. It can be used for light radiation in the spectral range from ultraviolet to infrared. Background technique [0002] Luminescent solar concentrators are well known in the art for capturing and collecting light from luminescent centers spread across a flat panel. The concentrator captures a portion of the light emitted by the luminescent center using total internal reflection in the light guide. The luminous centers re-radiate light at longer wavelengths within a 360-degree solid angle, so it is inefficient to spread light to a small area on one side or edge of the panel. [0003] One example of a solar concentrator known in the art utilizes holograms and prisms or plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S23/00G02B5/18G03H1/26H01L31/0232H01L31/052H01L31/054
CPCY02E10/52Y02E10/44H01L31/0543H01L31/054Y02B10/10H01L31/0522F24J2/06Y02B10/20G03H1/26H01L31/0547H01L31/0232G02B5/1814F24S23/00F24S50/20Y02E10/47H01L31/055
Inventor 格来恩·A·罗森伯格
Owner TERRASUN LLC
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