发明名称 |
Extrusion of plastic plate for Fresnel lens mfr. |
摘要 |
Extruding plastic plate (10) with a finely textured surface (8) uses a co-extrusion plant (1,2) and a three-roll polishing stack (4,5,4'), one roll (5) of which has a textured surface (7). The coextruded plate consists of a high viscosity polymer forming a base onto which a lower viscosity polymer is extruded. A Fresnel lens mfd. by the process is claimed as is the use of the plastic plate (10) with a linear Fresnel lens surface structure (8) as a light collector in a solar heat panel. Also claimed is a solar heat panel including a tube for the heat transfer fluid and the claimed lens which directs the light onto the tube.
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申请公布号 |
DE4407468(A1) |
申请公布日期 |
1995.09.07 |
申请号 |
DE19944407468 |
申请日期 |
1994.03.05 |
申请人 |
ROEHM GMBH, 64293 DARMSTADT, DE |
发明人 |
BERKENKOPF, MARTIN, 64319 PFUNGSTADT, DE;LORENZ, HANS, 64291 DARMSTADT, DE |
分类号 |
B29D11/00;F24J2/08;G02B3/08;(IPC1-7):B29C47/30;B29C47/90;B29C59/04 |
主分类号 |
B29D11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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