Abstract： |
An expansion strong light collapsing feedback displacement measuring system belongs to laser measuring technology field. It relates to applied Zeeman double-refraction double-frequency laser, beam of light collimating spread implement, empty pyramid prism, variable attenuator and feedback mirror with strong reflectivity. When object moves each one forth light wave, the intensity of laser will bring seasonal fluctuate. There are four polarization sections in one period, o light section, coexist section of o light and e light, e light and non-light section, and each of them corresponds one sixteenth light wave of object. Detect the number of the polarization section to get the displacement mete of the object. When the motion direction changes, the appearance order of the four polarization sections in each period changes too, and distinguishes the displacement direction of object. |
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