| 摘要 |
PURPOSE:To improve measurement precision by allowing a signal processing part to find the wavelength of primary light and correspondence relation between a primary light detection element and the wavelength on the basis of an element which detects the zero-order light of a spectrum formed on a linear array sensor and perform calibration. CONSTITUTION:The device consists of a detection part 3 which consists of a housing and a housing for containing a holding means for a standard plate 2, an O-shaped frame which allows the two housing to face each other across a running sheet of paper 4 and constitutes a base running forth and back in a section determined in the width direction of the paper 4, and an arithmetic and control part. When calibration is performed, the detection part 3 is put at a calibration position off the running path of the paper 4, a white plate 14 is set at a specific position, and light from a halogen lamp 5 is allowed to strike a spectroscope 7. Then, the signal processing part 13 reads the detection signal of the spectrum image-formed on the linear array sensor 12 and calculates the wavelength of the primary light and the correspondence relation between an element which detects the primary light and the primary light on the basis of the element which detects zero-order light. |
