A Method of Eliminating Digital Holographic Zero-Order Image by One-step Fixed Angle Phase Shift
A digital holography, fixed-angle technology, applied in the field of digital holography, can solve the problems of large error of multi-step phase shift and adverse effects of results, and achieve the effect of shortening time, reducing adverse effects and ensuring accuracy
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[0040] Embodiment 1: Digital holography method of one-step fixed-angle phase shift zero-order elimination
[0041] First, use the Nankai University emblem as an object to construct object light in MATLAB. Establish a Cartesian coordinate system x-y on the recording plane, and illuminate the Nankai University emblem with parallel light with an amplitude of 3V / m and a propagation direction along the x-axis, then the transmitted light is the object light, A o is the amplitude of the object light, is the phase of the object light, where the image of the object and the object light is as figure 2 and image 3 shown.
[0042] Second, build two parallel lights with opposite phases and different amplitudes as reference lights, where the amplitude A of reference light 1 R1 =1V / m, the amplitude A of reference light 2 R2 =2V / m, the angle between reference light 1 and reference light 2 and the x-axis Set the wavelength of the two reference beams to 800nm, and record Then the ph...
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