Brightness measuring instrument
专利汇可以提供Brightness measuring instrument专利检索，专利查询，专利分析的服务。并且PURPOSE: To measure the brightness of color light to match the sensitivity of human eyes, by providing for photodetectors having each different band spectral filter, a non-linear operating part, and an adding part.
CONSTITUTION: A light beam which is diffused by a diffusion plate reaches a photodetector 3 through a continuous interference filter 1, and a light shielding plate 2. The photodetector 3 is constituted of four each independent photoelectric converting elements. That is to say, signal outputs of the photoelectric converting elements S, T, and U reach a non-linear converting part 5 through each amplifying part 4, and converted therein as shown by the prescribed expression. On the other hand, a signal output of the photoelectric converting element W reaches an adding part 6 through the amplifying part 4, added to a signal output P of the non-linear operating part 5, and brightness B is outputted. In such a way, to say nothing of color light which a monochromatic spectrum has and white light, with regard to color light in every point on a CIE chromaticity diagram, it can be measured as the quantity which has conformed with brightness which is sensed by human eyes.
COPYRIGHT: (C)1987,JPO&Japio，下面是Brightness measuring instrument专利的具体信息内容。
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