发明名称 |
Mirror scan velocity control |
摘要 |
An improved mirror scan control for driving a movable mirror in an interferometer with a constant scan velocity comprises a closed loop servo control which provides constant velocity mirror scan in response to a phase comparison of a signal derived from the beat frequency of a two frequency laser beam passing through the interferometer and a selected frequency reference signal, wherein the difference in frequencies or beat frequency of the two frequency laser beam is stabilized at a specified difference in frequencies. The mirror scan control employs a phase lock control loop which locks the frequency of the referenced signal with the frequency of the signal derived from the laser beam to provide precise mirror velocity control.
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申请公布号 |
US4655587(A) |
申请公布日期 |
1987.04.07 |
申请号 |
US19850781185 |
申请日期 |
1985.09.25 |
申请人 |
BECKMAN INSTRUMENTS, INC. |
发明人 |
WIJNTJES, GEERT;HERCHER, MICHAEL |
分类号 |
G01J3/453;(IPC1-7):G01J3/45;G01B9/02 |
主分类号 |
G01J3/453 |
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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