Speckle noise reduction strategies in laser-based projection imaging, fluorescence microscopy, and digital holography with uniform illumination, improved image …

V Kumar, AK Dubey, M Gupta, V Singh, A Butola… - Optics & laser …, 2021 - Elsevier
There has been immense advancement in laser-based projection imaging, fluorescence
microscopy, single-molecule localization nanoscopy, and digital holography. These …

Speckle reduction in coherent information processing

T Iwai, T Asakura - Proceedings of the IEEE, 1996 - ieeexplore.ieee.org
Speckle reduction techniques have been developed as one of the most active research
fields in coherent optical information processing, together with the investigations of speckle …

Speckle reduction in laser projection systems by diffractive optical elements

L Wang, T Tschudi, T Halldorsson, PR Petursson - Applied optics, 1998 - opg.optica.org
In laser projection systems the observer in the far field of the image points on the screen will
recognize serious speckle noise. There are many methods to reduce or eliminate speckles …

Laser speckle reduction by multimode optical fiber bundle with combined temporal, spatial, and angular diversity

DS Mehta, DN Naik, RK Singh, M Takeda - Applied optics, 2012 - opg.optica.org
We report significant speckle reduction in a laser illumination system using a vibrating
multimode optical fiber bundle. The optical fiber bundle was illuminated by two independent …

Color image projection based on Fourier holograms

M Makowski, I Ducin, M Sypek, A Siemion, A Siemion… - Optics letters, 2010 - opg.optica.org
A method of color image projection is experimentally validated. It assumes a simultaneous
illumination of a spatial light modulator (SLM) with three laser beams converging in a …

70.2: Invited Paper: Holographic Laser Projection Technology

E Buckley - SID Symposium Digest of Technical Papers, 2008 - Wiley Online Library
Abstract Light Blue Optics' holographic laser projection technology exploits the physical
process of two‐dimensional diffraction to form video images. Such a method of image …

Speckle reduction in laser projections with ultrasonic waves

L Wang, TT Tschudi, M Boeddinghaus… - Optical …, 2000 - spiedigitallibrary.org
In laser front projection display, the observer in the far field of the image pixels on the screen
will observe serious speckle noise. For the first time we show a way to eliminate speckles in …

Speckle noise reduction in digital holography by slightly rotating the object

J Herrera-Ramirez, DA Hincapie-Zuluaga… - Optical …, 2016 - spiedigitallibrary.org
This work shows the realization of speckle reduction in the numerical reconstruction of
digitally recorded holograms by the superposition of multiple slightly rotated digital …

High-efficiency static speckle-suppression method based on a combination of beam splitting cavity and liquid-core fiber

H Mao, W Zhou, W Gao, Y Cao, Z Le - Optics Express, 2023 - opg.optica.org
Current static speckle suppression methods have an extremely large system size and
unsatisfactory performance. This study proposes a device called beam-splitting cavity (BSC) …

Optical coherence modulation by ultrasonic waves. 2: Application to speckle reduction

Y Imai, M Imai, Y Ohtsuka - Applied Optics, 1980 - opg.optica.org
Laser light, which is doubly phase modulated by an ultrasonic wave, can be utilized for
speckle reduction. The double phase modulation is found to be more effective for speckle …