| 摘要 |
PROBLEM TO BE SOLVED: To provide an image reading apparatus capable of increasing image-reading speed. SOLUTION: An image reading apparatus 1-1 includes a first LED 21, a second LED 22, a light guide 3 that performs linear illumination, an LED control circuit 4 that controls a quantity of light of each LED based on respective reference light quantities T1, T2 and corrects the respective reference light quantities T1, T2, a CCD 5 that scans an original P when each of the LEDs are put on simultaneously, an AFE that generates read image data corresponding to the original P, and a light modulation reference member disposed at a position where imaging by the CCD 5 is possible. During the correction of each of the reference light quantities T1, T2, the LED control circuit 4 puts each LED on individually, each LED is then modulated by correcting the present output values X1, X2 based on the modulated light image data G1, G2 generated by imaging the light modulation reference member when each of the LEDs is on and the reference light quantities T1, T2 based on target output values Xo1, Xo2 corresponding to each of the LEDs. COPYRIGHT: (C)2009,JPO&INPIT
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