发明名称 |
Method for manufacturing fresnel lens |
摘要 |
A method for manufacturing a Fresnel lens includes the flowing steps: a. providing a mixture for forming the Fresnel lens; b. providing a lower mold on which the mixture is disposed; c. vacuumizing the mixture on the lower mold; d. providing an upper mold to exert a pressure on a top surface of the mixture; e. vacuumizing the mixture on the lower mold again; and f. heating the mixture on the lower mold to harden the mixture whereby the Fresnel lens can be obtained. |
申请公布号 |
US8287780(B2) |
申请公布日期 |
2012.10.16 |
申请号 |
US20100749481 |
申请日期 |
2010.03.29 |
申请人 |
HUANG YUNG-LUN;HON HAI PRECISION INDUSTRY CO., LTD. |
发明人 |
HUANG YUNG-LUN |
分类号 |
B29D11/00 |
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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