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Method of measurement of color temperature and a device for carrying out said method

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专利汇可以提供Method of measurement of color temperature and a device for carrying out said method专利检索,专利查询,专利分析的服务。并且A beam of heat radiation emitted by a substance under study is modulated by causing the beam to pass alternately through a first colored filter and a second colored filter which permit transmission of two different colors. The beam as thus modulated is passed through an interference filter having an adjustable ratio of transmission for the two colors and then strikes a single photodetector. The interference filter is finally adjusted to a color transmission ratio such that the electric signals delivered by the photodetector and corresponding respectively to each of the two colors should be in equilibrium. After this adjustment, the interference filter provides a measurement of the temperature.,下面是Method of measurement of color temperature and a device for carrying out said method专利的具体信息内容。

1. A device for determining the color temperature of a substance comprising, from the upstream end to the downstream end along the beam of heat radiation emitted by said substance, a modulator, two colored filters for said modulator for transmission of two beams of different colors, a movable support for said filters which presents said filters in alternate sequence to said beam, an interference filter in which the ratio of transmission of said two beams of different colors is adjustable by modifying the angle of inclination of said interference filter with respect to the direction of said beam of heat radiation, a photodetector receiving alternatively said two beams of different colors and generating an output signal parts of which are a function of the intensities of each colored beam received by said photodetector, electronic means for comparing said photodetector signal parts and means for adjusting the angle of inclination of said interference filter to obtain a given ratio of signal parts, said angle of inclination being an analogic measure of said color temperature.
2. A device in accordance with claim 1, wherein said mechanism for adjusting the angle of inclination of said interference filter is controlled by said electronic means.
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