Devices and method for manufacturing lens, and fresnel lens
A Fresnel lens, lens technology, applied in the direction of lens, signal device, application, etc., can solve the problems of excessive occupation, time-consuming, high weight, etc. of manufacturing process
Pending Publication Date: 2020-04-14
ZKW GRP GMBH
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- Description
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Problems solved by technology
Such a method has the disadvantage that the passive cooling phase is time consuming and the manufacturing process takes too much time
Such a lens has, for example, the disadvantage that due to its size (diameter up to 70 mm), the lens has a relatively high weight and therefore also shifts the center of gravity of the overall projection module significantly forwards (in the direction of travel)
Furthermore, thick material cross-sections lead to very high cycle times in the case of standard imaging lenses
Method used
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[0074]Reference is first made to Figures 1a and 1b. FIG. 1 a shows a Fresnel lens 1 . FIG. 1 b shows the steps of a method which corresponds to the shaping method according to the invention and which can be used for producing the Fresnel lens 1 of FIG. 1 a. In this case, it is a production method for lenses which are preferably used in the motor vehicle sector and in particular in motor vehicle headlights. The Fresnel lens 1 has essentially two layers: a dimensionally stable substrate layer 2 and a polymer layer 3 consisting of at least one chemically curable polymer 4 adhered to a dimensionally stable 2 places on the base layer. The polymer layer consists, for example, of thermally curable silicone. The Fresnel lens can also consist of a polymer layer 3 and a dimensionally stable base layer 2 . This means that no additional adhesive layer, for example millimeter thick, is required between the dimensionally stable base layer 2 and the polymer layer 3 . Preferably, the pol...
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Abstract
The invention provides a forming method for manufacturing a lens, wherein the lens is constructed to a composite member. The composite member comprises a shape-stable substrate layer and at least onepolymer layer which is composed of at least one chemical-curable polymer, wherein the forming method comprises the following steps of supplying a substrate layer with a stable shape, at least onen chemical-curable polymer and a female mold; pouring the at least one chemical-curable polymer into the female mold; placing the substrate layer with the stable shape on the female mold; curing at least one chemical-curable polymer; demolding the obtianed composite member from the substrate layer with the stable shape and demolding the polymer layer which is adhered to at least one surface of the substrate layer with the stable shape from the female mold.
Description
technical field [0001] The invention relates to a molding method (Abformverfahren) for producing lenses (Linse) which are constructed as a composite part comprising a dimensionally stable substrate layer and consisting of at least one chemically curable or chemically curable polymer At least one polymer layer, wherein not only the shape-stable base layer but also the at least one polymer layer is transparent and the at least one polymer layer is adhered to at least one face of the shape-stable base layer . [0002] Furthermore, the invention relates to a lens for a motor vehicle headlight module produced by such a forming method. [0003] Furthermore, the invention relates to a Fresnel lens (Fresnellinse), which is constructed as a composite (Verbund), which comprises a dimensionally stable substrate layer and at least one polymer composed of at least one chemically curable A polymer layer, wherein both the dimensionally stable base layer and the at least one polymer layer a...
Claims
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IPC IPC(8): B29D11/00G02B3/08F21S41/255
CPCB29D11/00269G02B3/08F21S41/255B29C33/04B29C33/303B29C39/38B29C2033/042B29D11/0048B29D11/00519B29D11/0073B29L2011/005G02B3/0012
Inventor P.沙登霍夫H.亚历山大J.居特尔B.曼德尔
Owner ZKW GRP GMBH