Abstract:
The present invention relates to a mobile device for measuring photometric characteristics of airport runway lights, including a measuring rod to be moved over runway lights to be checked in the light beams emitted by said lights, and a means for measuring the distance between said measuring rod and the lights to be checked, said measuring rod having at least one photometric sensor, and including a means for acquiring and processing the signals transmitted by said photometric sensor(s) on the basis of the measured distance between said measuring rod and the lights to be checked, said acquisition and processing means being capable of generating a set of data that are representative of photometric characteristics of each checked light.
Abstract:
A system for generating a colored light comprises a set of illuminant types and a processor. The set of illuminant types is associated with a chromaticity gamut, and the set of illuminant types comprises at least five illuminant types that are each associated an illuminant type hue angle. The processor is configured to determine, based at least in part on a mapping, an output level set for a received color coordinate. The mapping comprises associating each color coordinate with an output level set that uses a set of hue-adjacent illuminant types. Hue-adjacent illuminant types comprise a group of illuminant types that are determined to be adjacent in a circular ordered list of illuminant types that is circularly ordered according to the illuminant type hue angle.
Abstract:
PURPOSE: An apparatus and a method for measuring light distribution characteristics are provided to efficiently measure the light distribution characteristics of a light source with a simple configuration. CONSTITUTION: An apparatus for measuring light distribution characteristics comprises multiple cameras (11,12), a driving unit, and a calculating unit. The cameras are installed in parallel to have same distance to a light source (2). The driving unit integrally drives multiple detects and updates the position of the detectors corresponding to the light source. The calculating unit calculates the light distribution characteristics of the light source. [Reference numerals] (AA) Y axis; (BB) X axis
Abstract:
PURPOSE: A method for classifying light sources is provided to effectively supply the light sources having uniform color in the same classified section. CONSTITUTION: A method for classifying light sources is as follows: a step of determining multiple color sections according to a desired classification standard in a CIE 1976 color coordinate(S12); a step of converting the coordinate of the color sections from the CIE 1976 color coordinate to a CIE 1931 color coordinate to determine multiple color classification sections corresponding to the color sections(S14); a step of measuring the CIE 1931 coordinate of light generated from the light sources to be classified(S16); and a step of classifying the light sources based on the color classification sections where the measured color sections are positioned(S18). [Reference numerals] (S12) Determine color sections according to a classification standard(CIE1976 coordinate); (S14) Confirm color classification sections by converting the coordinate of the color sections(CIE1976 → CIE1931); (S16) Measure the color coordinate of an LED light source(on the basis of CIE1931); (S18) Classify the LED light source according to the measuring result(on the basis of CIE1931 color classification area)
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:
Multiple colors of light emitted by an assembled light emitting diode (LED) based illumination device is automatically tuned to within a predefined tolerance of multiple target color points by modifying portions of wavelength converting materials associated with each color. A first color of light emitted from the assembled LED based illumination device in response to a first current is measured and a second color of light emitted from the assembled LED based illumination device in response to a second current is measured. A material modification plan to modify wavelength converting materials is determined based at least in part on the measured colors of light and desired colors of light to be emitted. The wavelength converting materials may be selectively modified in accordance with the material modification plan so that the assembled LED based illumination device emits colors of light that are within a predetermined tolerance of target color points.