Roll angle measurement device and method based on array-type multiple reflections
A technology of roll angle measurement and multiple reflections, applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as difficult resolution, and achieve the effect of improving resolution
Active Publication Date: 2012-09-05
XI AN JIAOTONG UNIV
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The invention discloses a roll angle measurement device and a roll angle measurement method based on array-type multiple reflections, wherein the device comprises a dual-frequency laser, a 1/2 wave plate and two sets of cube-corner prism arrays; a beam-splitting prism is arranged at the back of an optical axis of the dual-frequency laser, and a first analyzer and a first photoelectric receiver are arranged on a reflecting optical axis of the beam-splitting prism; a 1/4 wave plate is arranged on a transmitting optical axis of the beam-splitting prism; the 1/2 wave plate is located between the two sets of cube-corner prism arrays; a right-angled reflecting prism is arranged on an emitting optical axis of the two sets of cube-corner prism arrays, and a second analyzer and a second photoelectric receiver are arranged on a reflecting optical axis of the right-angled reflecting prism; and the output end of the first photoelectric receiver and the output end of the second photoelectric receiver are connected with a phase meter. According to the device and the method, detection components are arranged in the two sets of cube-corner prism arrays, thus effectively applying an array-type multiple reflection method used for displacement measurement to roll angle measurement. The problem of the difficulty of measuring a roll angle which is vertical to the direction of a laser beam in the conventional laser interferometry is overcome, and the advantage of relatively high roll angle measurement resolution compared with the prior art is obtained.
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