首页> 外国专利> Measuring beat frequency variations between two single mode lasers for distance measurement - sweeping wavelength of at least one laser and measuring and evaluating resulting phase angle change

Measuring beat frequency variations between two single mode lasers for distance measurement - sweeping wavelength of at least one laser and measuring and evaluating resulting phase angle change

机译：测量两个单模激光器之间的拍频变化以进行距离测量-扫描至少一个激光器的波长并测量和评估所产生的相角变化

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摘要

The method involves influencing the frequencies of the lasers using acoustic optical modulators to operate a superheterodyne interferometer whose periodic output signal's phase depends on the reflector distance and beat frequency. The wavelength of at least one laser is tuned monotonically over a defined range to cause a monotonic change in beat frequency. The resulting phase angle variations and the total phase change are recorded. The beat frequency change is obtained using a simple algorithm taking account of signal propagation speed. An absolute distance measurement is obtained using two interferometers. USE/ADVANTAGE - For exact measurement of beat frequency of two single mode lasers and high resolution distance measurement.

机译：该方法涉及使用声光调制器来影响激光器的频率，以操作超外差式干涉仪，其周期输出信号的相位取决于反射器距离和拍频。在限定的范围内单调调谐至少一个激光器的波长，以引起拍频的单调变化。记录所产生的相角变化和总相变。使用信号传播速度的简单算法即可获得拍频变化。使用两个干涉仪获得绝对距离测量值。使用/优势-用于精确测量两个单模激光器的拍频和高分辨率距离测量。

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公开/公告号DE4139839A1

专利类型
公开/公告日1993-06-09

原文格式PDF
申请/专利权人 ERNST-MORITZ-ARNDT-UNIVERSITAET O-2200 GREIFSWALD DE;JENOPTIK GMBH O-6900 JENA DE;DEUTSCHE AEROSPACE AG 8000 MUENCHEN DE;
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申请/专利号DE19914139839
发明设计人 BECHSTEIN KARL-HEINZ DIPL.-PHYS. O-6900 JENA DE;SALEWSKI KLAUS-DIETER DR. 2200 GREIFSWALD DE;MAURER RALF DIPL.-ING. 8000 MUENCHEN DE;MANHART SIGMUND DIPL.-PHYS. 8013 HAAR DE;SCHMIDT-BISCHOFFSHAUSEN HORST DR. 8014 NEUBIBERG DE;SCHMITT NIKOLAUS DIPL.-PHYS. 8000 MUENCHEN DE;
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申请日1991-12-03
分类号G01J9/02;G01B11/02;G01B9/02;
国家 DE
入库时间 2022-08-22 05:01:30

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