Patent ID: 7133167
Filing Date: 2006-11-07
Classification: H04N

Abstract:
1. An image reader comprising: a CCD sensor which converts image information into image data composed of electrical signals; a mirror set which transmits image data on an object of reading to the CCD sensor; a movement mechanism which moves the mirror set and/or the object of reading at a given speed; a drive unit which generates driving force; a driving force transmission mechanism which transmits the driving force generated by the drive unit to the movement mechanism; a fluctuation detector which detects a fluctuation frequency of the drive unit and capable of processing an output signal from the CCD sensor and detecting the fluctuation frequency attained as the movement mechanism is moved and the peak of the fluctuation frequency; and a transmission condition changing mechanism which changes a condition for the transmission of the driving force generated by the drive unit when a peak of a fluctuation frequency detected by the a fluctuation detector is equal to the natural frequency of the drive unit, the fluctuation detector being externally connectable and which processes an output signal from the CCD sensor and detects the fluctuation frequency attained as the movement mechanism is moved and the peak of the fluctuation frequency.