发明名称 FRESNEL LENS STRUCTURE
摘要 <p>PURPOSE:To fix a guide member without using any adhesive. CONSTITUTION:The lens is deformed plastically into a target shape by receiving pressure from both right and left sides at the time of press forming. At this time, the recessed part 3 of the guide member which is arranged around the lens 1 serves for a play in the press forming, so a lens material flows in the recessed part 3. The volume of the lens 1, the quantity of the lens material to be used, and the volume of the recessed part 3 are so adjusted that the lens material flows the recessed part 3 and does not overflow.</p>
申请公布号 JPH0566302(A) 申请公布日期 1993.03.19
申请号 JP19910227680 申请日期 1991.09.09
申请人 NEC CORP 发明人 TANABE TAKASHI
分类号 B29C43/02;B29C43/36;B29L11/00;G02B1/04;G02B3/00;G02B7/02 主分类号 B29C43/02
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