| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser collimator employed in a radiation thermometer in order to visually confirm a thermal measuring point clearly, in the case of measuring a temperature of a colored object to be measured with a specific range of wavelength (e.g. red color to orange color) by using the radiation thermometer. SOLUTION: The laser collimator has a plurality of light sources (e.g. laser diodes) with different wavelength range from each other, and a switching means selecting the light sources in accordance with the color of the object to be thermally measured, and projects a marker beam with a color (wavelength range) different from that of the object to be thermally measured, thereby enabling to visually confirm the thermal measuring point clearly. COPYRIGHT: (C)2004,JPO
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