发明名称 |
Universal detector for atomic and molecular beams |
摘要 |
An atomic or molecular beam detector is disclosed wherein the beam to be detected is coupled through a chopper to form a spatially modulated beam which is then directed at the pressure sensitive surface of a small sensitive microphone. The electrical output signal of this microphone is coupled to a phase-sensitive detector in order to detect the energy that is present in the signal at the frequency corresponding to the chopping rate. In the specific embodiment disclosed, a light beam is also coupled through the chopper in order to develop a second electrical signal which is mixed with the electrical output of the microphone and then coupled through a low pass filter to provide a DC signal when the atomic or molecular beam is present.
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申请公布号 |
US4375033(A) |
申请公布日期 |
1983.02.22 |
申请号 |
US19810241718 |
申请日期 |
1981.03.09 |
申请人 |
BELL TELEPHONE LABORATORIES, INCORPORATED |
发明人 |
BJORKHOLM, JOHN E.;WHITE, JONATHAN C. |
分类号 |
G01D5/48;(IPC1-7):G01D18/00;G12B13/00;B01D59/44;H01J49/40 |
主分类号 |
G01D5/48 |
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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