LAND INSTRUMENTS INTERNATIONAL LIMITED Patent applications |
Patent application number | Title | Published |
20140346377 | RADIATION THERMOMETER - A radiation thermometer is provided, comprising: a thermal radiation detector assembly having an operative surface area responsive to thermal radiation of a first wavelength; a focussing optics assembly adapted to focus both thermal radiation of the first wavelength and visible light of a second wavelength along an optical axis, the focussing optics assembly being configured to form a focussed image of the operative surface area of the thermal radiation detector assembly on a focal plane outside the radiation thermometer, the focussed image of the operative surface area defining a target region from which the thermal radiation detector assembly detects thermal radiation; a visible light source assembly adapted to exhibit an illuminated pattern of visible light of the second wavelength, the visible light source assembly comprising at least one visible light source and a mask through which light from the at least one visible light source is arranged to pass, the mask having one or more substantially opaque portions and one or more translucent portions arranged to define the illuminated pattern; and a radiation splitter adapted to deflect one of thermal radiation of the first wavelength and visible light of the second wavelength, and to transmit the other, or to deflect both wavelengths differently, the radiation splitter being configured so as to pass the thermal radiation along a first optical path from the focussing optics assembly to the thermal radiation detector assembly, and to pass the visible light along a second optical path from the visible light source assembly to the focussing optics assembly. | 11-27-2014 |
20110018721 | METHOD AND APPARATUS FOR MEASURING THE TEMPERATURE OF A SHEET MATERIAL - A method of measuring the temperature of a sheet material in which the sheet material is arranged such that it forms at least one side of a cavity so as to enhance the effective emissivity of the sheet material in the vicinity of the cavity. The method involves a) generating a thermal image of at least part of the inside of the cavity using a thermal imaging device to detect radiation emitted by the cavity, the thermal image comprising a plurality of pixels each having a pixel value representative of radiation emitted by a respective region of the cavity; b) identifying a first subset of the plurality of pixels whose pixel values meet predetermined criteria; c) using the identified first subset of pixels to determine a line on the thermal image representative of optimal emissivity enhancement in the cavity; and d) selecting a second subset of the plurality of pixels based on the determined line and generating a temperature profile along the determined line derived from the pixel values associated with each of the second subset of pixels. | 01-27-2011 |
20100265987 | Method and Apparatus for Measuring the Temperature of a Sheet Material - A method of measuring the temperature of a sheet material arranged such that it forms at least one side of a cavity, so as to enhance the effective emissivity of the sheet material in the vicinity of the cavity comprises: generating a thermal image of at least part of the inside of the cavity, the thermal image comprising a plurality of pixels each having a pixel value representative of radiation emitted by a respective region of the cavity; identifying a first subset of the pixels whose pixel values meet predetermined criteria; using the identified first subset to determine a line on the thermal image representative of optimal emissivity enhancement in the cavity; and selecting a second subset of the pixels based on the determined line and generating a temperature profile along the determined line derived from the pixel values associated with each of the second subset of pixels. | 10-21-2010 |
20090196324 | Real-Time Line Scan Extraction from Infrared Images Using the Wedge Method in Industrial Environments - A method of measuring the temperature of a sheet material arranged such that it forms at least one side of a cavity, so as to enhance the effective emissivity of the sheet material in the vicinity of the cavity comprises: generating a thermal image of at least part of the inside of the cavity, the thermal image comprising a plurality of pixels each having a pixel value representative of radiation emitted by a respective region of the cavity; identifying a first subset of the pixels whose pixel values meet predetermined criteria; using the identified first subset to determine a line on the thermal image representative of optimal emissivity enhancement in the cavity; and selecting a second subset of the pixels based on the determined line and generating a temperature profile along the determined line derived from the pixel values associated with each of the second subset of pixels. | 08-06-2009 |
20090037135 | Radiation Thermometer - A radiation thermometer comprising a radiation detector and an optical input path arranged to direct radiation from an object of interest to the radiation detector is disclosed. The radiation detector is adapted to output a signal related to the radiation received from the object of interest, and a processor is adapted to generate temperature measurements from the signal. Filtering means are provided in the optical input path which are arranged to block radiation having a wavelength between approximately 0.92 and 0.98 microns. | 02-05-2009 |