| 摘要 |
PROBLEM TO BE SOLVED: To enable measurement of both of an amount of radiation and an amount of light, and to allow a quite short cycle to output information capable of specifying the amount of light in real time.SOLUTION: A light-amount measurement device comprises a signal output unit that performs signal processing of a first detection signal from a first photoelectric conversion unit and a second detection signal from a second photoelectric conversion unit to externally output the processed signal. As shown with a dashed line La, a first optical filter is configured so that a spectral sensitivity characteristic of a first light reception sensor in a wavelength range Ra from the shortest 350nm in a wavelength range Rm of a measurement object to 555nm of the maximum sensitivity in a standard spectral luminous efficiency is the spectral sensitivity characteristic corresponding to the standard spectral luminous efficiency, and as shown with a double-dashed line Lb, a second optical filter is configured so that a spectral sensitivity characteristic of a second light reception sensor in the wavelength range Rb from 555nm to the longest 750nm in the wavelength range Rm of the maximum sensitivity in a standard spectral luminous efficiency is the spectral sensitivity characteristic corresponding to the standard spectral luminous efficiency.SELECTED DRAWING: Figure 2 |
