A novel method for repeatedly generating speckle patterns used in digital image correlation
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2017.09.012
Abstract: Abstract Speckle patterns play a key role in Digital Image Correlation (DIC) measurement, and generating an optimal speckle pattern has been the goal for decades now. The usual method of generating a speckle pattern is… read more here.
Keywords: generating speckle; speckle; method; speckle patterns ... See more keywords
Remote photonic detection of human senses using secondary speckle patterns
Sign Up to like & getrecommendations! Published in 2022 at "Scientific Reports"
DOI: 10.1038/s41598-021-04558-0
Abstract: Neural activity research has recently gained significant attention due to its association with sensory information and behavior control. However, the current methods of brain activity sensing require expensive equipment and physical contact with the tested… read more here.
Keywords: speckle patterns; speckle; remote photonic; detection human ... See more keywords
Core-shell NaErF4@NaYF4 upconversion nanoparticles qualify as a NIR speckle wavemeter for a visible CCD.
Sign Up to like & getrecommendations! Published in 2021 at "Nanoscale"
DOI: 10.1039/d1nr03932f
Abstract: Speckle patterns have been widely employed as a method for precisely determining the wavelength of monochromatic light. In order to achieve higher wavelength precision, a variety of optical diffusing waveguides have been investigated with a… read more here.
Keywords: upconversion nanoparticles; speckle; speckle patterns; precision ... See more keywords
Cross-polarization ratio analysis of digital speckle patterns applied to teeth demineralization diagnosis
Sign Up to like & getrecommendations! Published in 2022 at "Laser Physics"
DOI: 10.1088/1555-6611/ac5cc9
Abstract: We propose using the cross-polarization ratio (CPR) of the digital speckle pattern as a parameter to detect enamel erosion. We applied such analysis to successfully detect enamel erosion caused by teeth demineralization. The speckle patterns… read more here.
Keywords: polarization ratio; speckle patterns; speckle; cross polarization ... See more keywords
Sound recovery via intensity variations of speckle pattern pixels selected with variance-based method
Sign Up to like & getrecommendations! Published in 2018 at "Optical Engineering"
DOI: 10.1117/1.oe.57.2.026117
Abstract: Abstract. In general, the sound waves can cause the vibration of the objects that are encountered in the traveling path. If we make a laser beam illuminate the rough surface of an object, it will… read more here.
Keywords: speckle pattern; method; speckle patterns; based method ... See more keywords
Estimation of statistical properties of rough surface profiles from the Hurst exponent of speckle patterns.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.390125
Abstract: We applied the Hurst exponent technique to an experimental study of rough metallic surface profiles and the speckle patterns generated by them. Characterization of important statistical properties of the surface profile and speckle patterns were… read more here.
Keywords: speckle patterns; hurst exponent; surface profiles; statistical properties ... See more keywords
Non-contact optical sensing of vocal fold vibrations by secondary speckle patterns.
Sign Up to like & getrecommendations! Published in 2020 at "Optics express"
DOI: 10.1364/oe.387932
Abstract: Vocal folds lesions are commonly diagnosed using an endoscopic-stroboscope. However, the stroboscopic picture of the vocal folds vibrations is subjectively and qualitatively evaluated by the clinician and, due to technical limitations, is unable to accurately… read more here.
Keywords: sensing vocal; secondary speckle; speckle patterns; vocal folds ... See more keywords