143 results about "Laser light scattering" patented technology

An electro-optic system, e.g., mounted to a weapon, measures down range winds and a range-to-target for compensating the ballistic hit point. The system may include an optical light source, collimated to generate a laser spot on the target. The system may include a wind measurement receiver that captures laser light scattered from the target. The captured light may be modulated by atmospheric scintillation eddies, producing optical patterns which change in time and move with the crosswind. These patterns may be analyzed by a processor using covariance techniques to determine path-integrated crosswinds and associated errors. Ranging is done by measuring the time of flight of the laser pulse to the target collecting the scattered signal from the target. Compensated ballistic hit point, measurement errors and other data may be displayed on a micro-display digital eyepiece, overlaid on the real-time image of the target.

A red phosphor whose phosphor-constituting crystal phase consists of CaAlSiN3 activated by monoclinic Eu. In particular, there is provided a red phosphor characterized by consisting of powder of CaAlSiN3 activated by Eu having an average particle diameter, as in unpulverized form measured by the laser diffraction / scattering particle size distribution measuring method, of = 10 [mu]m. Further, there is provided a light emitting device comprising a blue light emitting element, the above red phosphor capable of converting blue light emitted by the blue light emitting element to red light and a yellow phosphor capable of converting the blue light to yellow light. Still further, there is provided a process for producing CaAlSiN3 activated by Eu, comprising firing in a nitrogenous atmosphere at 1400 to 2000 DEG C a raw material powder of Ca3N2, AlN and Si3N4 whose composition falls within the region as enclosed in the composition diagram of 1 by straight lines connecting four points A to D each represented by (Ca3N2 : AlN : Si3N4) wherein the Ca3N2, AlN and Si3N4 mean molar ratio thereof, as follows: Point A: (10:70:20), Point B: (10:65:25), Point C: (70:23:7), and Point D: (70:22:8), the raw material powder further containing EuN in an amount of 0.01 to 20 pts.wt. in terms of Eu per 100 pts.wt. of the sum of Ca3N2, AlN and Si3N4.

Device, method, and computer program product for determining a material parameter of a blood coagulation cascade based on parameters of light diffused at a biofluid sample. In one example, the biofluid sample includes a blood sample. Laser light scattered by the sample is collected by the optical system in reflection and / or transmission mode. An image of the sample in so collected light is formed, and data representing fluctuations of laser speckle intensity with is processed to derive numerical descriptors associated with blood coagulation and fibrinolysis. In a specific case, such numerical descriptors are derived based on temporal dynamic of a viscoelastic characteristic of the blood sample.

An electro-optic system, e.g., mounted to a weapon, measures down range winds and a range-to-target for compensating the ballistic hit point. The system may include an optical light source, collimated to generate a laser spot on the target. The system may include a wind measurement receiver that captures laser light scattered from the target. The captured light may be modulated by atmospheric scintillation eddies, producing optical patterns which change in time and move with the crosswind. These patterns may be analyzed by a processor using covariance techniques in either the time-domain or the frequency-domain to determine path-integrated crosswinds and associated errors. Ranging is done by measuring the time of flight of the laser pulse to the target collecting the scattered signal from the target. Compensated ballistic hit point, measurement errors and other data may be displayed on a micro-display digital eyepiece, or projected onto the direct view optics (DVO) of a riflescope so as to be overlaid in real-time on the optical image of the target.

Nozzles and nebulizers able to produce aerosol with optimum and reproducible quality based on feedback information obtained using laser imaging techniques. Two laser-based imaging techniques based on particle image velocimetry (PTV) and optical patternation map and contrast size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. Two pulses from thin laser sheet with known time difference illuminate droplets flow field. Charge coupled device (CCL)) captures scattering of laser light from droplets, providing two instantaneous particle images. Pointwise cross-correlation of corresponding images yields two-dimensional velocity map of aerosol velocity field. For droplet size distribution studies, solution is doped with fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. Ratio of LIF / Mie images provides relative droplet size information, then scaled by point calibration method via phase Doppler particle analyzer.