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Method for manufacturing high-luminous-efficacy focusing solar Fresnel lens

A technology of Fresnel lens and concentrating solar energy, which is applied in the field of production of high-efficiency concentrating solar lens, can solve the problems of no Fresnel lens structure, etc., so as to improve light efficiency, service life, transparency and resistance The effect of aging ability

Active Publication Date: 2011-11-02
HANGZHOU XINENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Method for manufacturing high-luminous-efficacy focusing solar Fresnel lens
  • Method for manufacturing high-luminous-efficacy focusing solar Fresnel lens
  • Method for manufacturing high-luminous-efficacy focusing solar Fresnel lens

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Embodiment Construction

[0019] The present invention is described in detail below in conjunction with embodiment and with reference to accompanying drawing: Figure 1-4 The basic structure of the unimproved Fresnel lens is shown. Its bottom surface 2 is a plane, which is the light-receiving surface of the lens, and its backlight surface is a left-right symmetrical annular corrugated surface with the center point as the center (see figure 1 , 2 ) or a striped corrugated surface based on the center line (see image 3 , 4 ), the longitudinal section is symmetrical and saw-toothed. See Figure 7 , each corrugation has a refraction surface 1, a vertical surface 15, a corrugation top 10 and a corrugation bottom 6, and the structural characteristics of the latter three hinder the light effect of the Fresnel lens. see Figure 5 , changing the vertical surface to the inner slope 9 inclined toward the focal point, and changing the original circular groove bottom 6 to a narrow plane bottom, the incident li...

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Abstract

The invention relates to a method for manufacturing a high-luminous-efficacy focusing solar Fresnel lens. The method comprises the following five steps of: 1, improving a ripple surface, wherein a vertical surface (15) of each ripple is changed into an inner inclined surface (9); an inclination angle of an intersection between the inner inclined surface (9) and a bottom surface (2) is reduced along with the increasing of a vertical distance between the intersection and a central optical axis (7); the degree di of each inclination angle can be calculated by an inverse trigonometric function; and a ripple bottom is changed into a narrow flat bottom; 2, selecting flat-panel quartz glass and silica gel as materials; 3, changing a single-layer mirror body into a glass and silica gel double-layer compound mirror body; 4, moulding; and 5, treating the surface of glass, performing rubber injection and compound forming, trimming the edge and inspecting so as to manufacture the improved Fresnellens. The lens manufactured by the method has high luminous efficacy, a low light precision requirement, high light transmission performance and anti-aging performance, low manufacturing cost and long service life. The compound lens has high material performance complementarity; furthermore, the processing difficulty of the die and the mirror body is reduced; and the service life of the die is prolonged.

Description

technical field [0001] The invention relates to a method for manufacturing a lens, in particular to a method for manufacturing a high light-efficiency concentrating solar lens by improving the mirror surface structure of a known Fresnel lens. Background technique [0002] Existing Fresnel lenses are made of optical-grade plastics such as quartz glass and plexiglass or polycarbon (PC), and the processing of quartz glass is difficult, and the processing cost is high, so it is difficult to make large-scale Fresnel lenses; plexiglass Made of optical-grade plastics such as PC, the light transmittance is low, and it is easy to age and further reduce the light transmittance, and the service life is short. As far as the mirror structure of the Fresnel lens is concerned, its light-receiving surface is a plane, and the backlight surface is a corrugated surface combined with a refraction surface and a vertical surface, which can be divided into ring corrugations and strip corrugations....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/08G02B1/04
Inventor 佘晓峰
Owner HANGZHOU XINENG NEW MATERIAL CO LTD
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