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2161 results about "Light detection" patented technology

Light detection and ranging (LiDAR) is a light-based method used the inspection of the interior of pipes. The technology is also used in a wide variety of applications across industries.

Method and apparatus for noninvasively monitoring parameters of a region of interest in a human body

A method and system are presented for use in noninvasive monitoring at least one parameter of a region of interest in a human body. The system comprises a measurement unit and a control unit. The measurement unit comprises an optical unit having an illumination assembly configured to define at least one output port for illuminating light, and a light detection assembly configured to define at least one light input port for collecting light and to generate measured data indicative of the collected light; and an acoustic unit configured to generate acoustic waves of a predetermined ultrasound frequency range. The measurement unit is configured and operable to provide an operating condition such that the acoustic waves of the predetermined frequency range overlap with an illuminating region within the region of interest and substantially do not overlap with a region outside the region of interest, and that the detection assembly collects light scattered from the region of interest and light scattered from the region outside the region of interest. The measured data is thus indicative of scattered light having both ultrasound tagged and untagged light portions, thereby enabling to distinguish between light responses of the region of interest and the region outside the region of interest. The control unit is connectable to the optical unit and to the acoustic unit to operate these units, and is responsive to the measured data and preprogrammed to process and analyze the measured data to extract therefrom data indicative of a light response of the region of interest and determine the at least one desired parameter.
Owner:OR NIM MEDICAL

Liquid crystal display device

The present invention provides a liquid crystal display device capable of shortening the time required for stabilizing the brightness and the chromaticity to the temperature change. The input of an LED driver is connected to the output of a PWM controller, so that the electric power supplied to the respective LED groups of red, green and blue are controlled with a PWM method. A feedback control means for controlling the PWM controller includes a brightness setting means, a color setting means, a multiplication means for receiving the outputs from the brightness setting means and the color setting means, a comparison means fed with the output of the multiplication means at one of the inputs thereof, a light sensor temperature compensation means for compensating for fluctuations of the output of the light detection means due to temperature changes, a liquid crystal display panel temperature compensation means for compensating for fluctuations of the spectral transmittance of the liquid crystal display panel due to temperature changes, an addition means for summing the result of detection by the light detection means and the output of the light sensor temperature compensation means, and a multiplication means for multiplying the output of the addition means by the output of the liquid crystal display panel temperature compensation means.
Owner:NEC DISPLAY SOLUTIONS LTD

Method and system for imaging an object or pattern

A system and method for simultaneously obtaining a plurality of images of an object or pattern from a plurality of different viewpoints is provided. In an exemplary embodiment, proper image contrast is obtained by replacing the light sources of earlier systems with equivalent light sensitive devices and replacing the cameras of earlier systems with equivalent light sources. With such a system, bright-field images and dark-field images may be simultaneously obtained. In one aspect of the invention, a light source is positioned to illuminate at least a portion of an object. A plurality of light guides having input ends are positioned to simultaneously receive light reflected from the object and transmit the received light to a plurality of photodetectors. The light guides are arranged such that their respective input ends are spaced substantially equally along at least a portion of a surface of an imaginary hemisphere surrounding the object. The signals generated by the photodetectors (as a result of light detection) are processed and a plurality of images of the object are formed. Another aspect of the invention provides a method for generating composite images from simultaneously obtained images. Equivalent regions of each image (corresponding to geographically identical subpictures) are compared. The subpicture having the highest entropy is selected and stored. This process continues until all subpictures have been considered. A new composite picture is generated by pasting together the selected subpictures. In another aspect of the invention, the vector of relative light values gathered for each pixel or region of an object illuminated or scanned (i.e., one value for each photodetector) is used to determine reflectance properties of points or regions illuminated on the object or pattern. The reflectance properties may be stored in a matrix and the matrix used to read, for example, a Bar Code of a data matrix symbol.
Owner:RUDOLPH TECHNOLOGIES INC

Automated assembly device of light-emitting diode (LED) finger lamps

The invention relates to an automated assembly device of light-emitting diode (LED) finger lamps. The automated assembly device of LED finger lamps comprises a machine frame and a workbench disposed on the machine frame. A big rotary disk is disposed on the workbench. A clamp for placing a bottom cover is arranged on the big rotary disk. An upper bottom cover assembly, an upper slice assembly, an upper battery assembly, an upper LED lamp assembly, an upper switch assembly, an upper top cover assembly, an upper top ring assembly, a lighting detection assembly and a blanking assembly are arranged on the periphery of the big rotary disk. The assemblies are respectively connected with a master control circuit and controlled by the master control circuit. The automated assembly device of LED finger lamps is reasonable in structural design. Automatic feed, detection, assembly and blanking of the assemblies of finger lamps are electrically controlled, production efficiency and product quality are improved, labor intensity of workers is greatly lowered, production cost is reduced, the automated assembly device of LED finger lamp is especially suitable for mass production of key cylinders, and market competitiveness of enterprises can be enhanced.
Owner:GUANGDONG LYRIC ROBOT INTELLIGENT AUTOMATION CO LTD
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