发明名称 Image reading apparatus and image reading system
摘要 <p>In an image sensor which has a photoelectric conversion element group, an illumination device having light sources of at least three emission colors R, G, and B, an imaging lens, and the like, moiré noise in a color output image is eliminated, the original reading time is shortened, and a cost reduction is attained. For this purpose, a sensor array (1) including a linear array of a plurality of photoelectric conversion elements, a lens array (2) for imaging an original image on the sensor array (1), an illumination device (3) using LEDs having emission colors R, G, and B, and a cover glass (4) are supported by and fixed to a frame (5). The conjugate length of the lens array (2) is set to fall within the range between the B and G emission wavelengths. An original pressed against the cover glass (4) is illuminated by the illumination device (3), and light reflected by the original is converted into electrical signals by the sensor array (1), thereby reading the original image. &lt;IMAGE&gt;</p>
申请公布号 EP0822706(A2) 申请公布日期 1998.02.04
申请号 EP19970113358 申请日期 1997.08.01
申请人 CANON KABUSHIKI KAISHA 发明人 TABATA, MASAMI;KAWAI, TATSUNDO
分类号 G06T1/00;H04N1/028;H04N1/04;H04N1/48;(IPC1-7):H04N1/48 主分类号 G06T1/00
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