| 摘要 |
PURPOSE:To improve measurement precision by forming a spectrum which is predetermined on the basis of a wavelength calibration command on a linear array sensor, and calibrating the correspondence relation between wavelength and respective elements of the linear array sensor. CONSTITUTION:The optical characteristic measuring device for paper consists of a detection part 3 composed of a housing for storing an optical system, etc., an O-shaped frame which allows two housing to face each other across a running sheet of paper 4 and constitutes a base for running forth and back in a fixed section in the width direction of the paper 4, and an arithmetic control part which runs the detection part 3, switches measurement and calibration, and processes signals from the detection part 3. Then when a wavelength calibration command is sent, a mercury vapor lamp 13 is turned on instead of a halogen lamp 4 to form a spectrum having peaks of plural predetermined wavelengths on the linear array sensor 12. Further, the correspondence relation between wavelength and respective elements of the linear array sensor 12 is calibrated. |
