Preparation method of linear Fresnel lens and Fresnel lens prepared by preparation method

A linear Fresnel and lens technology, applied in the field of Fresnel lenses, can solve the problems of Fresnel lenses such as poor weather resistance, complicated preparation process, and low production efficiency, and achieve easy operation, simple preparation method, and overcome poor weather resistance Effect

Active Publication Date: 2012-12-05
NANJING SOLGLASS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, Fresnel lenses are made of transparent organic materials such as glass or acrylic through molding molds. The production process of mold molding is intermittent, and the production efficiency is low, so the production cost is high; it is also useful for glass materials. The compound molding method of organosilica gel has complex preparation process, low efficiency, and the obtained Fresnel lens has poor weather resistance

Method used

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  • Preparation method of linear Fresnel lens and Fresnel lens prepared by preparation method
  • Preparation method of linear Fresnel lens and Fresnel lens prepared by preparation method
  • Preparation method of linear Fresnel lens and Fresnel lens prepared by preparation method

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Embodiment 1

[0034] Such as figure 1 As shown, the equipment of the preparation method of the linear Fresnel lens of the present invention comprises in sequence: a melting device, a deflector, an upper pressure roller, a lower pressure roller, a guide cooling plate, a conveying device, an annealing kiln, wherein the upper pressure roller and One of the lower pressure rollers is a flat smooth roller, and the other is a mold roller engraved with tooth patterns; the upper pressure roller and / or the lower pressure roller are hollow rollers that can pass cooling water, and the upper pressure roller and The distance between the lower pressing rollers is 5mm, the rolling pressure is 100MPa, and the rolling speed is 170m / h; the viscosity of the glass before rolling is 10 3 dPas, the viscosity of the glass after rolling is 10 7 dPas; guide the cooling plate to cool to the viscosity of the glass is 10 13 dPas; annealing viscosity is 10 13 dPas, the annealing time is 15 minutes. After passing thr...

Embodiment 2

[0037] Such as figure 1 As shown, the equipment of the preparation method of the linear Fresnel lens of the present invention comprises in sequence: a melting device, a deflector, an upper pressure roller, a lower pressure roller, a guide cooling plate, a conveying device, an annealing kiln, wherein the upper pressure roller and One of the lower pressure rollers is a flat smooth roller, and the other is a mold roller engraved with tooth patterns; the upper pressure roller and / or the lower pressure roller are hollow rollers that can pass cooling water, and the upper pressure roller and The distance between the lower pressing rollers is 7mm, the rolling pressure is 100MPa, and the rolling speed is 150m / h; the viscosity of the glass before rolling is 10 5 dPas, the viscosity of the glass after rolling is 10 11 dPas; guide the cooling plate to cool to the viscosity of the glass is 10 13 dPas; the annealed viscosity is 4×10 14 dPas, the annealing time is 15 minutes. After the g...

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Abstract

The invention discloses a preparation method of a linear Fresnel lens and a Fresnel lens prepared by the preparation method. The preparation method comprises the following steps of melting glass raw materials, rolling, cooling and annealing in sequence. The linear Fresnel lens prepared by the preparation method comprises an incident surface, an emergent surface and insection on the emergent surface. The preparation method of the linear Fresnel lens is simple, easy to operate, suitable for continuous production and applicable to any glass material which can be used for preparing the linear Fresnel lens; the production efficiency is improved greatly, and the production cost is reduced greatly at the same time; and moreover the prepared linear Fresnel lens is made integrally, so that the defects that a linear Fresnel lens in the prior art is poor in weather resistance, high in cost and the like are overcome; and a lens prepared by the preparation method has a good light focusing efficiency.

Description

technical field [0001] The invention relates to a preparation method of a linear Fresnel lens and the obtained Fresnel lens. Background technique [0002] Fresnel lens is a kind of planar "convex lens", which replaces convex lens in many application fields. It has a smooth surface on one side and tooth patterns on the other side. Through these tooth patterns, the light band in the specified spectral range can be reflected or Refraction, which brings light rays passing through a lens to a focal point. [0003] The structure of Fresnel lens is generally divided into circular Fresnel lens, linear Fresnel lens, etc., among them, the circular Fresnel lens will converge the incident parallel light The incident parallel light (sunlight) can be converged into a linear focal spot, which has broad application prospects in the fields of solar photovoltaic power generation, solar thermal power generation, and solar thermal utilization. [0004] At present, Fresnel lenses are made of t...

Claims

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Application Information

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IPC IPC(8): G02B3/08
Inventor 朱峰邓运明周华
Owner NANJING SOLGLASS SCI & TECH
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