发明名称 |
Fourier transform holography using pseudo-random phase shifting of object illuminating beams and apodization |
摘要 |
A phase mask comprised of a square array of phase shifting areas arranged in pseudo-random pattern is illuminated with a beam of electromagnetic radiation, as a result of which an array of pseudo-randomly phase shifted beams emerges from the phase mask and impinges upon an object transparency to be intensity-modulated thereby and come to a focus on a Fourier transform plane. The power spectrum of the beams distributes in orthogonal directions on the Fourier transform plane from its center maxima in a distinct pattern of series of fringes. The technique of apodization is employed to suppress the fringes to thereby reduce the coherent noise of a hologram to a minimum.
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申请公布号 |
US4013338(A) |
申请公布日期 |
1977.03.22 |
申请号 |
US19760652154 |
申请日期 |
1976.01.26 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL COMPANY, LIMITED |
发明人 |
SATO, ISAO;KATO, MAKOTO |
分类号 |
G03H1/22;G03H1/16;(IPC1-7):G03H1/16 |
主分类号 |
G03H1/22 |
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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