Canon Kabushiki Kaisha

Kenichi Suda

Shizuo Hasegawa

Kimiyoshi Hayashi

Kazuhiko Hirooka

Nobuo Matsuoka

An image forming apparatus responsive to environmental conditions has an image forming device for forming a dot image on a recording member. The image forming device includes exposure apparatus for exposing the recording member. A detector detects a humidity condition of the apparatus, and control circuitry regulates the amount of light of the exposure apparatus in accordance with an output of the detector. The control circuitry is adapted, when the humidity detected by the detector is lower than a predetermined value, to select an amount of light of the exposure apparatus larger than that in the case where the humidity is higher than the predetermined value.

Image forming apparatus having a converter for image data characteristics

A color original reading apparatus includes a filter having a long-wavelength invisible radiation absorption filter and a long-wavelength invisible radiation reflection filter, or includes a spectral distribution correction filter arranged in an optical path from an original illumination light source to a color image sensor via an original.

Original reading apparatus, having a filter, for reading a color original

Image forming apparatus responsive to environmental conditions

An image reading apparatus includes a plurality of linear sensors for reading an image of a document. Each linear sensor reads a different portion of a line of the document in a divided manner. A plurality of clamp circuits control black levels of signals generated by the plurality of linear sensors to be a black reference level. A plurality of multipliers control white levels of signals generated by the plurality of linear sensor means which are level-controlled by the clamp circuits so as to be a white reference level.

Growing community of inventors

Yokohama, Japan

Kenichi Suda