发明名称 |
Collimator lens |
摘要 |
A collimator lens to be used for an optical recording/reproducing apparatus is constituted by a refractive index distribution type lens to satisfy specific conditions, thereby the invention provides the collimator lens which is good in the productivity and has the wave surface aberration being equivalent to or better than that of a collimator lens using a spherical lens.
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申请公布号 |
US4693565(A) |
申请公布日期 |
1987.09.15 |
申请号 |
US19860856822 |
申请日期 |
1986.04.28 |
申请人 |
NIPPON SHEET GLASS CO., LTD. |
发明人 |
ICHIKAWA, HIROYUKI;TOYAMA, MINORU |
分类号 |
G02B9/02;G02B3/00;G02B3/06;G02B27/30;(IPC1-7):G02B3/00 |
主分类号 |
G02B9/02 |
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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