| 发明名称 |
SINGLE BI-ASPHERICAL LENS |
| 摘要 |
<p>Single bi-aspherical lens. A single element lens having two aspherical refractive surfaces is described, which lens comprises a lens substrate and two layers of a transparent plastics with an aspherical outer profile. m e lens substrate is a sphere and can be manufactured simply and cheaply.</p> |
| 申请公布号 |
CA1267014(A) |
申请公布日期 |
1990.03.27 |
| 申请号 |
CA19850493204 |
申请日期 |
1985.10.17 |
| 申请人 |
N.V.PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
BRAAT, JOSEPHUS J.M. |
| 分类号 |
G02B13/00;G02B3/02;G02B3/04;G02B13/18;G11B7/135;(IPC1-7):G02B3/04 |
主分类号 |
G02B13/00 |
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