Computer-generated hologram for elliptical gaussian beam correction lias been investigated, detail mathematical equations of calculating hologram phase difference arc derived. The holograms which are drawn by a computer-driven plotter are given. The holographic optical elements are obtained from CGH. The experiment result to demonstrate the correct calculation is also shown in this paper.
The corrected coefficients for high frequence modulating (HFM) imaging formulas in holographic system are given. The exact results of the diffractive angle and coordinate value for imaging point can be obtained if corrected coefficient is used in these formulas to correct. The checking of results proved that the error in diffractive angle can be kept within 0.4 percent. The formulas of x3ν and y3ν which can be also computed simply from corrected coefficient as μ≤1 are given.
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