发明名称 |
Scanning afocal laser velocimeter projection lens system |
摘要 |
A method and apparatus for projecting and focusing parallel laser light beams from a laser doppler velocimeter on a target area. The system includes three lenses. Two lenses work together as a fixed afocal lens combination. The third lens is a movable scanning lens. Parallel laser beams travel from the velocimeter through the scanning lens and through the afocal lens combination and converge, i.e. are focused, somewhere beyond. Moving the scanning lens relative to the fixed afocal combination results in a scanning of the focus area along the afocal combination's optical axis.
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申请公布号 |
US4346990(A) |
申请公布日期 |
1982.08.31 |
申请号 |
US19790073477 |
申请日期 |
1979.09.07 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION |
发明人 |
RHODES, DAVID B. |
分类号 |
G01P5/26;(IPC1-7):G01P3/36;G02B3/00 |
主分类号 |
G01P5/26 |
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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