专利名称：Cylindrical lens and a manufacturing method
for the same
发明人：Koichi Nagamachi申请号：US07/790004申请日：19911104公开号：US052367A公开日：19930810
摘要：A lens in a shape of cylinder or head-cut-off cone made of transparent thin filmmaterials with a fine prism-shaped fresnel lens surface formed thereon. The cylindricallens is manufactured by forming a fine prism- shaped linear fresnel lens surface on a thintransparent film, shaping the film into a cylinder or a frustum of a cone, and connectingboth ends of the film so that the fresnel center line forms a horizontal ring.
申请人：ZENI LITE BUOY CO., LIMITED
代理机构：Koda and Androlia
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