发明名称 |
FOURIER-TRANSFORM HOLOGRAPHY BY PSEUDO-RANDOM PHASE SHIFTING |
摘要 |
<p>A phase mask comprised of a rectangular array of phase shifting areas arranged in a pseudo-random pattern is illuminated with a beam of electromagnetic radiation. The array of pseudo-randomly phase shifted beams is focused on a Fourier transform plane on which the power spectrum of the beams distributes in two orthogonal directions from its center maxima. The phase shifting areas are arranged in such a manner that there is an approximately equal number of phase shifts for each of the different phase shifting areas with a constant phase relation between orthogonally adjacent phase shifting areas. The center maxima of the spectrum is confined to a rectangular-shaped area and uniformly distributed by suitably selecting the number of different phase shifts. Coherent noise on the reconstructed image is effectively eliminated.</p> |
申请公布号 |
CA1053042(A) |
申请公布日期 |
1979.04.24 |
申请号 |
CA19750232701 |
申请日期 |
1975.08.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KATO, MAKOTO |
分类号 |
G02B5/18;G03H1/16;(IPC1-7):03H1/16;03H1/32 |
主分类号 |
G02B5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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