Portable standoff spectrometer for hazard identification using integrated quantum cascade laser arrays from 6.5 to 11 µm.
MF Witinski, R Blanchard, C Pfluegl, L Diehl, B Li… - Optics …, 2018 - opg.optica.org
This article presents new spectroscopic results in standoff chemical detection that are
enabled by monolithic arrays of Distributed Feedback (DFB) Quantum Cascade Lasers …
enabled by monolithic arrays of Distributed Feedback (DFB) Quantum Cascade Lasers …
Speckle-free common-path quantitative phase imaging with high temporal phase stability using a partially spatially coherent multi-spectral light source
Quantitative phase imaging (QPI) has been an important technique for the determination of
various biophysical parameters, such as the refractive index and morphology of biological …
various biophysical parameters, such as the refractive index and morphology of biological …
Speckle noise reduction based on induced mode hopping in a semiconductor laser diode by drive current modulation
I Yılmazlar, M Sabuncu - Optics & Laser Technology, 2015 - Elsevier
We propose and demonstrate a speckle reduction technique in a laser diode projection
system. By modulating the drive current of the laser diode continuously, we manage to …
system. By modulating the drive current of the laser diode continuously, we manage to …
Flexible and lightweight speckle noise suppression module based on generation of dynamic speckles with multimode fiber and macro fiber composite
We propose a flexible and lightweight laser speckle noise suppression module based on the
combination of a multimode fiber (MMF) and a macro fiber composite (MFC). The …
combination of a multimode fiber (MMF) and a macro fiber composite (MFC). The …
Ultrasound system for high-speed and high resolution imaging applications
An ultrasound imaging system includes an array of ultrasound transducer elements chat
send ultrasound energy into an object when energized for respective transmission time …
send ultrasound energy into an object when energized for respective transmission time …
Record-High Efficiency Speckle Suppression in Multimode Fibers Using Cascaded Cylindrical Piezoelectric Ceramics
We present a technique that utilizes cascaded resonant cylindrical piezoelectric ceramics
and multimode optical fibers wound around them to effectively mitigate laser speckle. By …
and multimode optical fibers wound around them to effectively mitigate laser speckle. By …
Optical modules that reduce speckle contrast and diffraction artifacts
J Hudman, M DePue - US Patent 9,462,253, 2016 - Google Patents
An optical module, for use in a depth camera, includes a plurality of laser emitting elements,
each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes …
each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes …
Optical modules that reduce speckle contrast and diffraction artifacts
J Hudman, M DePue - US Patent 10,024,968, 2018 - Google Patents
An optical module, for use in a depth camera, includes a plurality of laser emitting elements,
each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes …
each of which emits a corresponding laser beam, and a micro-lens array (MLA) that includes …
Micro-refractive optical elements fabricated by multi-exposure lithography for laser speckle reduction
Laser speckle reduction with a macro refractive optical element (mROE) is restricted by the
limited entrance facet size of light pipe. Here, we have fabricated a micro-ROE (μROE) that …
limited entrance facet size of light pipe. Here, we have fabricated a micro-ROE (μROE) that …
Simultaneous high-resolution and wide-field microscopy with improved image sharpness using pseudo-thermal light source and Fourier Ptychography
Lasers have been widely used in areas such as interferometry, imaging, holography,
projection displays, etc. as they provide the benefit of high spatio-temporal coherence and …
projection displays, etc. as they provide the benefit of high spatio-temporal coherence and …