Abstract:
PROBLEM TO BE SOLVED: To provide a measuring device and a measuring method of an optical characteristic of a light source having excellent measuring efficiency, capable of acquiring a measurement result equivalent to an integrating sphere system without using an expensive integrating sphere, and to provide an inspection device including the measuring device. SOLUTION: A light source, a plurality of light receiving means having each light receiving part for receiving directly light radiated from the light source, and a light receiving means support means are prepared. The light source is arranged on the center of a virtual sphere, and at least two of the light receiving parts of each light receiving means are arranged on positions corresponding to the surface center of each surface, a middle point of each side, or each vertex of a virtual regular polyhedron inscribed on the virtual sphere, or on positions corresponding to some combination thereof. Then, the light source is allowed to emit light, and output from each light receiving means is detected, and spectral spectrum information of the light source is extracted, and the spectral spectrum information is subjected to operation processing, to thereby analyze the optical characteristic of the light source. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
An illumination device and method are provided herein for calibrating individual LEDs in the illumination device to obtain a desired luminous flux and a desired chromaticity of the device over changes in drive current, temperature, and over time as the LEDs age. The calibration method may include subjecting the illumination device to a first ambient temperature, successively applying at least three different drive currents to a first LED to produce illumination at three or more different levels of brightness, obtaining a plurality of optical measurements from the illumination produced by the first LED at each of the at least three different drive currents, obtaining a plurality of electrical measurements from the photodetector and storing results of the obtaining steps within the illumination device to calibrate the first LED at the first ambient temperature. The plurality of optical measurements may generally include luminous flux and chromaticity, the plurality of electrical measurements may generally include induced photocurrents and forward voltages, and the calibration method steps may be repeated for each LED included within the illumination device and upon subjecting the illumination device to a second ambient temperature.
Abstract:
An illumination device comprises one or more emitter modules having improved thermal and electrical characteristics. According to one embodiment, each emitter module comprises a plurality of light emitting diodes (LEDs) configured for producing illumination for the illumination device, one or more photodetectors configured for detecting the illumination produced by the plurality of LEDs, a substrate upon which the plurality of LEDs and the one or more photodetectors are mounted, wherein the substrate is configured to provide a relatively high thermal impedance in the lateral direction, and a relatively low thermal impedance in the vertical direction, and a primary optics structure coupled to the substrate for encapsulating the plurality of LEDs and the one or more photodetectors within the primary optics structure.
Abstract:
A method for generating a calibration parameter for light sources includes activating at least one LED of a plurality of multicolor LEDs of a light source and measuring a color of the at least one LED in a first color space. The method also includes scaling the color of the at least one LED relative to the plurality of multicolor LEDs, obtaining a plurality of scaled color measurements, and calculating a calibration matrix based on the plurality of scaled color measurements.
Abstract:
In one embodiment, a diagnostic system for biological samples is disclosed. The diagnostic system includes a diagnostic instrument, and a portable electronic device. The diagnostic instrument has a reference color bar and a plurality of chemical test pads to receive a biological sample. The portable electronic device includes a digital camera to capture a digital image of the diagnostic instrument in uncontrolled lightning environments, a sensor to capture illuminance of a surface of the diagnostic instrument, a processor coupled to the digital camera and sensor to receive the digital image and the illuminance, and a storage device coupled to the processor. The storage device stores instructions for execution by the processor to process the digital image and the illuminance, to normalize colors of the plurality of chemical test pads and determine diagnostic test results in response to quantification of color changes in the chemical test pads.
Abstract:
A metrology system is used for measuring a spectral feature of a pulsed light beam. The metrology system includes: a beam homogenizer in the path of the pulsed light beam, the beam homogenizer having an array of wavefront modification cells, with each cell having a surface area that matches a size of at least one of the spatial modes of the light beam; an optical frequency separation apparatus in the path of the pulsed light beam exiting the beam homogenizer, wherein the optical frequency separation apparatus is configured to interact with the pulsed light beam and to output a plurality of spatial components that correspond to the spectral components of the pulsed light beam; and at least one sensor that receives and senses the output spatial components.
Abstract:
A color sensor arrangement comprises a color sensor arranged to generate at least a first channel signal being indicative of a color of light incident on the color sensor. A processing unit is connected to the color sensor and arranged to generate a tuple of color signals by processing the at least first channel signal. A memory is connected to the processing unit and a control unit is connected to the processing unit and to the memory. Furthermore, the control unit is arranged to receive calibration data relating the tuple of color signals to a calibrated tuple of color signals and arranged to store said calibration data (M) by means of the memory. An interface is connected to the processing unit and comprises an interface terminal.
Abstract:
Methods for replacing conventional light fixtures with solid state light fixtures are disclosed that can comprise selecting a replacement area comprising a plurality of conventional lamps. A sample of the plurality of conventional lamps in the replacement area is selected. The emission characteristics for each of the sample plurality of conventional lamps is measured. The conventional lamp emission characteristics are matched to emission characteristics of replacement LED lamps. All of the conventional lamps within said light replacement area are replaced with the replacement LED lamps. The emission characteristics of the LED replacement lamps at each of said locations of the sample plurality of conventional lamps are measured. The sample conventional lamp emission characteristics are compared to the LED replacement lamp characteristics to confirm that they are the same or are within an acceptable deviation.