Anti-polarization-mixing double-line polarization interference and single Wollaston prism beam splitting homodyne laser vibrometer
A technology of laser vibrometer and prism splitting, which is applied in instruments, measuring devices, and measuring ultrasonic/sonic/infrasonic waves. Leakage and polarization aliasing, suppression of polarization leakage and aliasing, effects of fewer optical elements
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[0030] The specific implementation manner of the present invention will be described in detail below with reference to the accompanying drawings, and examples will be given.
[0031] An anti-polarization aliasing dual-line polarization interference and single Wollastedt prism spectroscopic homodyne laser vibrometer is composed of an interference part 13 and a detection part 14, and the interference part 13 is composed of a laser 1, a half Wave plate 2, first depolarizing beam splitter 3, measuring mirror 4, second quarter wave plate 5, and reference mirror 6; laser 1 emits linearly polarized light, which becomes 45 The linearly polarized light is split by the first depolarizing beam splitter 3, the reflected light forms the first beam 15 as the measuring light, and the transmitted light forms the second beam 16 as the reference light; after the first beam 15 is reflected by the measuring mirror 4, The third light beam 17 is formed by transmission through the first depolarizing...
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