发明名称 |
Off-axis illumination direct-to-digital holography |
摘要 |
Systems and methods are described for off-axis illumination direct-to-digital holography. A method of recording an off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis, includes: reflecting a reference beam from a reference mirror at a non-normal angle; reflecting an object beam from an object at an angle with respect to an optical axis defined by a focusing lens; focusing the reference beam and the object beam at a focal plane of a digital recorder to form the off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; digitally recording the off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes for Fourier analysis; Fourier analyzing the recorded off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes by transforming axes of the recorded off-axis illuminated spatially heterodyne hologram including spatially heterodyne fringes in Fourier space to sit on top of a heterodyne carrier frequency defined as an angle between the reference beam and the object beam; applying a digital filter to cut off signals around an original origin; and then performing an inverse Fourier transform.
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申请公布号 |
US6747771(B2) |
申请公布日期 |
2004.06.08 |
申请号 |
US20020234044 |
申请日期 |
2002.09.03 |
申请人 |
UT-BATTELLE, L.L.C. |
发明人 |
THOMAS CLARENCE E.;PRICE JEFFERY R.;VOELKL EDGAR;HANSON GREGORY R. |
分类号 |
G01B9/021;G03H1/08;(IPC1-7):G03H1/22 |
主分类号 |
G01B9/021 |
代理机构 |
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地址 |
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