发明名称 |
Focussed laser beam optical system |
摘要 |
The focal range of a focussed laser beam is enlarged with a simple optical stop where the beam has a Gaussian cross-sectional profile. The stop is arranged between the laser producing the beam, and a beam focussing lens system, and it is provided with an aperture of predetermined diameter with respect to that of the laser beam whereby the outer portion of the beam represented by the low intensity skirts of the profile curve is stopped. This arrangement can influence the focal range up to a 75 percent increase over that obtained with the unstopped beam.
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申请公布号 |
US4304467(A) |
申请公布日期 |
1981.12.08 |
申请号 |
US19790043185 |
申请日期 |
1979.05.29 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
RABEDEAU, MELBOURNE E. |
分类号 |
H01S3/101;G02B5/00;G02B27/00;G02B27/09;G02B27/58;G06K7/10;(IPC1-7):G02B9/00 |
主分类号 |
H01S3/101 |
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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