Single image fast phase shift system and phase detection method based on deflection angle
A single image, deflection angle technology, applied in the direction of measurement devices, measurement optics, optical radiation measurement, etc., can solve the problem that speckle cannot achieve rapid deformation measurement, etc.
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[0041] See figure 1 In this embodiment, the system configuration of the single image rapid phase shift system based on the deflection angle includes a laser 1, a variable nd filter 2, a beam expander 3, a collimating component 4, an aperture stop 5, an imaging lens 6, Reflecting mirror 8, dichroic prism 10 and CCD camera 9.
[0042] In this embodiment, the output light of the laser 1 is divided into object light and reference light by the variable nd filter 2. The object light is expanded by the beam expander 3 and then irradiated to the surface of the object 7 to form laser speckle interference. The return object light on the surface of the measured object is projected on the target surface array of the CCD camera 9 through the aperture stop 5 and the imaging lens 6 in turn; the reference light is collimated by the collimating component 4 into a reference collimated laser with a larger aperture diameter. The collimated laser is irradiated on the target surface array of the CCD ...
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