Phase acquisition device for single exposure target surface multiplexing

The invention discloses a phase acquisition device for single exposure target surface multiplexing. The phase acquisition device comprises an LED light source, a collimating lens, an aperture diaphragm, a Fourier transform lens, a focusable lens, a spherical mirror, a standard reflector and a CCD. After the parallel light is incident as object light, the center of the focus-adjustable lens, the center of sphere of the spherical mirror and the standard reflector are confocal. And tiny zooming is realized by driving the focusable lens. One half of the target surface of the CCD is focused object information, the other half of the target surface of the CCD is slightly defocused object information, and at the moment, the phase information of the measured object can be inversely solved only through single exposure and a light intensity transmission equation. The device is simple and stable in structure and small in number of collected pictures, so that the device is suitable for dynamic measurement of transparent o