| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive luminous intensity measuring instrument which continuously measures the concentration of ozone water by a simple constitution. SOLUTION: The luminous intensity measuring instrument is equipped with one light source (2) wherein light is separated in two directions, a measuring cell (3) for permitting one of the separated lights to pass, a measuring detector (S1) for detecting the intensity of transmitted light passed through the measuring cell (3) as a DC electric signal, a comparing detector (S2) for detecting the insensity of the other one of the separated lights as a DC electric signal, a luminous intensity measuring means (H) and a logarithmic transformation means (T). The luminous intensity measuring means (H) and the logarithmic transformation means (T) use an electric and/or electronic circuit not having the arithmetic means of a computer to perform automatic correction and logarithmic transformation. By this constitution, this luminous intensity measuring instrument becomes an inexpensive and simple constitution because no computer is used. Further, it is unnecessary to interrupt operation for the purpose of correction because of automatic orrection, and continuous measurement enabled. COPYRIGHT: (C)2004,JPO&NCIPI
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