公开(公告)号：EP1187458B1

公开(公告)日：2011-02-16

申请号：EP01307355.6

申请日：2001-08-30

申请人： Ricoh Company, Ltd.

发明人： Inoue, Yoshikazu ,  Nara, Wataru ,  Nomizu, Yasuyuki ,  Kawamoto, Hiroyuki ,  Fukano, Hiroshi ,  Sano, Motoya ,  Kubo, Hiroshi ,  Hattori, Hitoshi

IPC分类号： H04N1/407

CPC分类号： H04N1/4076

公开(公告)号：EP1187458A3

公开(公告)日：2004-08-11

申请号：EP01307355.6

申请日：2001-08-30

申请人： Ricoh Company, Ltd.

发明人： Inoue, Yoshikazu ,  Nara, Wataru ,  Nomizu, Yasuyuki ,  Kawamoto, Hiroyuki ,  Fukano, Hiroshi ,  Sano, Motoya ,  Kubo, Hiroshi ,  Hattori, Hitoshi

IPC分类号： H04N1/407

CPC分类号： H04N1/4076

摘要： An image-reading device (1) is provided. The image-reading device (1) comprises a photoelectric converting element (25) reading a first image from a subject copy (D), a reference-white member (12) functioning as a reference white used in a white-shading correction, reading means (4) for reading a second image from a constant range on a surface of the reference-white member (12) by using the photoelectric converting element (25), averaging means (44; 22) for dividing image data of the second image into a plurality of blocks in a sub-scanning direction so that each of the blocks includes a plurality of lines and obtaining average values of image data of the lines in the blocks respectively, peak-value determining means (45, 46; 22) for obtaining a peak value of the average values, and white-shading correcting means (43; 22) for performing the white-shading correction to image data of the first image by using the peak value as white-shading data.

公开(公告)号：EP1381215B1

公开(公告)日：2008-07-16

申请号：EP03014525.4

申请日：2003-07-04

申请人： Ricoh Company, Ltd.

发明人： Ando, Kazuhiro ,  Inoue, Yoshikazu ,  Sano, Motoya ,  Fukano, Hiroshi ,  Nara, Wataru ,  Ohta, Akira, Mitsubishi Denki Kabushiki Kaisha

IPC分类号： H04N1/031

CPC分类号： H04N1/0285 ,  H04N1/0287 ,  H04N1/0318 ,  H04N2201/02497 ,  H04N2201/03112 ,  H04N2201/0312 ,  H04N2201/03129 ,  H04N2201/03137 ,  H04N2201/03141 ,  H04N2201/03166 ,  H04N2201/03195

摘要： A lighting device includes a light source that illuminates an object of illumination, a reflecting member provided opposite the light source so as to direct a first part of illuminating light emitted therefrom to the object of illumination, and a light-blocking member provided between the light source and the object of illumination and between the reflecting member and the object of illumination. The light-blocking member blocks the first directed part of the illuminating light and a second part of the illuminating light directly illuminating the object of illumination with a certain ratio of a light-blocking rate for the first directed part of the illuminating light to a light-blocking rate for the second directly illuminating part of the illuminating light.

公开(公告)号：EP1381215A1

公开(公告)日：2004-01-14

申请号：EP03014525.4

申请日：2003-07-04

申请人： Ricoh Company, Ltd.

发明人： Ando, Kazuhiro ,  Inoue, Yoshikazu ,  Sano, Motoya ,  Fukano, Hiroshi ,  Nara, Wataru ,  Ohta, Akira, Mitsubishi Denki Kabushiki Kaisha

IPC分类号： H04N1/031

CPC分类号： H04N1/0285 ,  H04N1/0287 ,  H04N1/0318 ,  H04N2201/02497 ,  H04N2201/03112 ,  H04N2201/0312 ,  H04N2201/03129 ,  H04N2201/03137 ,  H04N2201/03141 ,  H04N2201/03166 ,  H04N2201/03195

摘要： A lighting device includes a light source that illuminates an object of illumination, a reflecting member provided opposite the light source so as to direct a first part of illuminating light emitted therefrom to the object of illumination, and a light-blocking member provided between the light source and the object of illumination and between the reflecting member and the object of illumination. The light-blocking member blocks the first directed part of the illuminating light and a second part of the illuminating light directly illuminating the object of illumination with a certain ratio of a light-blocking rate for the first directed part of the illuminating light to a light-blocking rate for the second directly illuminating part of the illuminating light.

摘要翻译： 照明装置包括照明照明对象的光源，与光源相对设置的反射部件，以将从其发射的照明光的第一部分引导到照明对象;以及遮光部件，设置在光 源和照明对象之间以及反射构件与照明对象之间。 遮光构件阻挡照明光的第一定向部分，并且以照射光的第一定向部分的遮光率的一定比例直接照射照明对象的照明光的第二部分为光 第二直接照明部分照明光的阻挡率。