发明名称 |
Composite four-element lens system, particularly for use with laser beams |
摘要 |
To reduce the size of the beam spot of a laser beam, a four-element lens having the characteristics set forth in the table forming part of the specification, is used, thereby providing a large-aperture objective with a field being about 2 DEG , coma corrected and with low image field convexity.
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申请公布号 |
US4081210(A) |
申请公布日期 |
1978.03.28 |
申请号 |
US19760659730 |
申请日期 |
1976.02.20 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
LIETAR, CHRISTIAN;BLANC, JEAN-PIERRE |
分类号 |
G02B9/34;G02B11/22;G02B13/00;(IPC1-7):G02B9/34 |
主分类号 |
G02B9/34 |
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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