Motion-resolved imaging of moving objects embedded within scattering media by the use of time-gated speckle analysis.

Spectral analysis of a time-evolving speckle pattern is used to provide motion-resolved detection of moving objects embedded within scattering media. Results show that the ability to detect small nonstationary scattering objects and to discriminate between objects moving at different rates is greatly enhanced.

[1]  Optical velocimetry: a method using two shifted speckle patterns , 1992 .

[2]  H Fujii,et al.  Blood flow observed by time-varying laser speckle. , 1985, Optics letters.

[3]  Toshimitsu Asakura,et al.  Dynamic laser speckles and their application to velocity measurements of the diffuse object , 1981 .

[4]  H Fujii,et al.  Evaluation of blood flow by laser speckle image sensing. Part 1. , 1987, Applied optics.

[5]  A. Mattick,et al.  Ultrahigh speed photography of picosecond light pulses and echoes. , 1971, Applied optics.

[6]  R. Alfano,et al.  Time-resolved coherent and incoherent components of forward light scattering in random media. , 1990, Optics letters.

[7]  C. Schmidt-Harms Velocimetry of moving phase plates using laser speckle patterns. , 1984, Applied optics.

[8]  R A Kruger,et al.  Time resolved imaging through a highly scattering medium. , 1991, Applied optics.

[9]  Detection of moving objects embedded within scattering media by use of speckle methods. , 1995, Optics letters.

[10]  N. Abramson,et al.  Chrono-coherent imaging for medicine , 1989, IEEE Transactions on Biomedical Engineering.

[11]  J. Fujimoto,et al.  Femtosecond optical ranging in biological systems. , 1986, Optics letters.

[12]  Y. Aizu,et al.  Evaluation of blood flow at ocular fundus by using laser speckle. , 1992, Applied optics.

[13]  H Chen,et al.  Two-dimensional imaging through diffusing media using 150-fs gated electronic holography techniques. , 1991, Optics letters.

[14]  S N Ma,et al.  Laser speckle velocimetry: using modulated dynamic speckle to measure the velocity of moving diffusers. , 1986, Applied optics.

[15]  A. F. Fercher,et al.  Visualization And Measurement Of Retinal Blood Flow By Means Of Laser Speckle Photography , 1986 .

[16]  Resolution-enhanced detection of moving objects embedded within scattering media using time-gated speckle methods. , 1996, Applied optics.

[17]  I. Popov,et al.  Mechanical vibration spectrum analysis by means of a speckle method , 1994 .