A method and apparatus for simultaneously acquiring interferograms created with a plurality of different interference conditions are provided in the present invention. In the present invention, an object beam and a reference beam are used to interfere with each other and there are a plurality of sub-fields of interference simultaneously generated. All the sub-fields of interference can be simultaneously acquired by an image acquiring device with single shooting action so as to form the plurality of interferograms. Moreover, the present invention also provides a method for solving the phase information of the object beam from the interferograms formed by the foregoing said method.
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