This paper describes a standing-wave interferometer with two laser sources of different wavelengths,diametrically opposed and emitting towards each other.The resulting standing wave has an intensity profile which is m...This paper describes a standing-wave interferometer with two laser sources of different wavelengths,diametrically opposed and emitting towards each other.The resulting standing wave has an intensity profile which is moving with a constant velocity,and is directly detected inside the laser beam by two thin and transparent photo sensors.The first sensor is at a fixed position,serving as a phase reference for the second one which is moved along the optical axis,resulting in a frequency shift,proportional to the velocity.The phase difference between both sensors is evaluated for the purpose of interferometric length measurements.展开更多
基金funded by the German Federal Ministry of Education and Research under contract 03V0235.
文摘This paper describes a standing-wave interferometer with two laser sources of different wavelengths,diametrically opposed and emitting towards each other.The resulting standing wave has an intensity profile which is moving with a constant velocity,and is directly detected inside the laser beam by two thin and transparent photo sensors.The first sensor is at a fixed position,serving as a phase reference for the second one which is moved along the optical axis,resulting in a frequency shift,proportional to the velocity.The phase difference between both sensors is evaluated for the purpose of interferometric length measurements.
