发明名称 |
LENS MEMBER AND OPTICAL UNIT USING SAID LENS MEMBER |
摘要 |
A plate-shaped lens member has concentric annular prisms each including an inner annular surface divided from a light-entrance surface of a conventional TIR lens and an outer annular surface divided from a light-reflection surface of the TIR lens in which the light-entrance surface has a concave shape provided in a lower portion of the TIR lens and the light-reflection surface has a convex shape positioned at a peripheral side of the TIR lens to surround the light-entrance surface. The light-entrance surface and light-reflection surface of the bulky TIR lens are Fresnel-ized or divided into a set of concentric annular prisms on a surface of the plate-shaped lens member and positions of divided portions from the TIR lens are efficiently arranged on the surface of the plate-shaped lens member.
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申请公布号 |
US2010284194(A1) |
申请公布日期 |
2010.11.11 |
申请号 |
US20100776730 |
申请日期 |
2010.05.10 |
申请人 |
CITIZEN ELECTRONICS CO., LTD.;CITIZEN HOLDINGS CO., LTD. |
发明人 |
MIYASHITA JUNJI;KAYANUMA YASUAKI;YASUHARA MAKOTO |
分类号 |
F21V5/04 |
主分类号 |
F21V5/04 |
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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