The invention relates to a
vibration measurement apparatus based on a
laser speckle of a polarized singular-
point light beam. With the apparatus, a problem that non-destructive telemetering of vibration information can not be realized in the prior art can be solved. On the basis of the principle of
laser speckle excitation by the polarized singular-
point light beam and combination with a vector-
light field coherent technology, a vector
light field coherent technology passes through a light splitter and then irradiates a detected zone; a singular-
point light beam laser scattering effect is generated by the detected zone; and a
laser speckle passes through an out-of focus
optical imaging system to carry out transmission. Another polarized singular-point
light beam after light splitting passes through two wave plates; horizontal polarized
distribution control is carried out and then reflection is carried out by a reflection element; an overlapped area with a laser speckle light filed exists to form an interference
light field; and a
photoelectric sensor detects the interference light field information and vibration information is obtained based on
information processing. According to the invention, the
vibration measurement apparatus has characteristics of non-contact detection, non-destructive detection, remote measurement realization, adjustable performance, high sensitivity and reliability, good anti-interference capability, wide
frequency response characteristic, high
information quantity, easy
system construction, convenient usage, and wide application range and the like.