Results 241 to 250 of about 2,012,293 (294)
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Physical Review E, 1994
We demonstrate experimentally that the intensity correlation function with shift in the scattered wave vector or with identical shifts in both the incident and scattered wave vectors form Fourier transform pairs, respectively, with the intensity distribution on the output surface and the propagator between the input and output surfaces. Measurements in
, Li, , Genack
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We demonstrate experimentally that the intensity correlation function with shift in the scattered wave vector or with identical shifts in both the incident and scattered wave vectors form Fourier transform pairs, respectively, with the intensity distribution on the output surface and the propagator between the input and output surfaces. Measurements in
, Li, , Genack
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Optics Letters, 1997
We report on a new laser feedback mechanism that uses speckle-pattern phenomena to create highly dispersive feedback. This speckle mirror is capable of creating laser emission as narrow as that from laser cavities using a number of dispersive elements such as gratings and prisms.
P C, de Oliveira +2 more
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We report on a new laser feedback mechanism that uses speckle-pattern phenomena to create highly dispersive feedback. This speckle mirror is capable of creating laser emission as narrow as that from laser cavities using a number of dispersive elements such as gratings and prisms.
P C, de Oliveira +2 more
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Applied Optics, 2005
The concept of femtosecond laser speckles is put forward. The theory of a speckle pattern in light of finite bandwidth is applied to describe femtosecond laser speckles. Basic representations of the contrast and the spectral correlation of femtosecond laser speckles are presented.
Wenjun, Liu, Changhe, Zhou
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The concept of femtosecond laser speckles is put forward. The theory of a speckle pattern in light of finite bandwidth is applied to describe femtosecond laser speckles. Basic representations of the contrast and the spectral correlation of femtosecond laser speckles are presented.
Wenjun, Liu, Changhe, Zhou
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Tracking and navigation of a microswarm under laser speckle contrast imaging for targeted delivery
Science RoboticsMicro/nanorobotic swarms consisting of numerous tiny building blocks show great potential in biomedical applications because of their collective active delivery ability, enhanced imaging contrast, and environment-adaptive capability.
Qinglong Wang +14 more
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Applied Optics, 1989
A new rotary encoder is proposed which detects displacement of speckle arising in the diffraction field of a cylinder illuminated by a narrow laser beam. The displacement is detected from the peak position of the cross-correlation between the outputs of a linear image sensor.
I, Yamaguchi, T, Fujita
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A new rotary encoder is proposed which detects displacement of speckle arising in the diffraction field of a cylinder illuminated by a narrow laser beam. The displacement is detected from the peak position of the cross-correlation between the outputs of a linear image sensor.
I, Yamaguchi, T, Fujita
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Quantum electronics (Woodbury, N.Y.), 2020
Laser speckle contrast imaging of the microcirculatory bed of the pancreas is performed, which allows its condition to be assessed and thereby is an additional valuable tool for making a diagnostic decision and dynamically monitoring the effectiveness of
E. V. Potapova +8 more
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Laser speckle contrast imaging of the microcirculatory bed of the pancreas is performed, which allows its condition to be assessed and thereby is an additional valuable tool for making a diagnostic decision and dynamically monitoring the effectiveness of
E. V. Potapova +8 more
semanticscholar +1 more source
Dynamic laser speckle analysis using the event sensor.
Applied Optics, 2020Dynamic laser speckle analysis (DLSA) can obtain useful information about the scene dynamics. Traditional implementations use intensity-based imaging sensors such as a complementary metal oxide semiconductor and charge-coupled device to capture time ...
Zhou Ge, Nan Meng, Li Song, E. Lam
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Laser speckle projection tomography
Optics Letters, 2013We propose a laser speckle projection tomography (LSPT) method to obtain a three-dimensional (3D) flowing image. The method combines the advantages of optical projection tomography and laser speckle imaging to reconstruct the visualization of 3D flowing structure.
Guanping, Feng +4 more
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Polarization microstatistics of laser speckle
Physical Review A, 1992The microstatistics of laser speckle has been investigated under varying incident polarization angle θ. The intensity at each point in a speckle pattern varies sinusoidally with θ and can be described completely by three parameters: amplitude, baseline, and relative phase.
, Tarhan, , Watson
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Optimizing the parameters for measuring laser speckle and speckle contrast
Applied Optics, 2014Evaluating the contrast in speckle patterns produced by laser projection displays can facilitate the development of methods to suppress such imperfection. Computer simulations were first conducted to characterize the contrast (C(gs)) of fully developed speckle patterns with spatial factor k and power factor r.
Wei-Feng, Hsu, Min-Chun, Chou
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