SCANNER, SPECTRUM CORRECTING METHOD THEREFOR AND IMAGE SCANNING METHOD USING SCANNER

摘要

PROBLEM TO BE SOLVED: To provide a scanner for easily and exactly perform the variable control of a sensitivity spectrum concerning various media. SOLUTION: The low-order set of light emitting elements with the same spectrum output corresponding to one color channel is operated for prescribed time or by prescribed power (306) (a), a signal on one color channel from a sensor assembly corresponding to the element operated in the step (a) is measured (308) (b), the peculiar real value of the signal is compared with the aimed value (310) (c) and when the real value and the aimed value have a difference more than a prescribed tolerance, the time or power used in the step (a) is controlled (d). Until the peculiar real value and the aimed value have a difference less than the prescribed tolerance, the steps (a)-(d) are repeated as needed (312) (e) and concerning the respective subsets of elements with various spectrum outputs corresponding to the same color channel, the steps (a)-(e) are repeated (314) (f).