Abstract: An image reading apparatus for reading an image by radiating the light onto an original includes a photosensor array the photosensors of which are arranged along the width of the original and receive the light scattered from the original surface and convert that light into electric signals. A period of time from the time when the photosensors receive the light until outputs containing the read information are derived cannot be ignored as compared with a reading scan time when the signals are read from the photosensor. A light source is arranged along the width of the original and is divided into a plurality of. A light-on controller for lighting the blocks of the light source to illuminate pixels for the reading of an image on the original, in advance of the reading of the pixels, for a time interval over neater than the foregoing period of time.

Abstract: An illumination device is provided which comprises a light source, a first light-deflecting means for converting the rays emitted from the light source into parallel rays and a second light-deflecting means for directing the parallel rays to an object to be illuminated.

Abstract: An image reading apparatus comprising a photosensor for receiving light from a light source through an original document, a wiring section for driving the photosensor, a circuit for driving the photosensor and for processing an output signal from the photosensor. The apparatus includes a first substrate having the photosensor and the wiring section thereon, and a second substrate having the circuit thereon and being separated from the first substrate. The second substrate is fixed above the first substrate.

Abstract: There is a method and an apparatus for reading an image in which the light emitted from a light source through an original is converted into an electric signal by a photoelectric converting device and is outputted as an image singal. In this method, a compensation light is radiated onto the photoelectric converting device and thereby causing a compensation signal to be generated therefrom; this compensation signal is stored into a memory; an original image is then read; and the read signal is compensated by the compensation signal stored in the memory. The compensation light corresponds to each intensity of lights which are obtained through a reference original to be read and which are received by the photoelectric converting device. By use of this method in an original reading section of a facsimile apparatus or the like, an ununiformity and a variation in signal of each bit which is read by the photoelectric converting device are compensated, so that a stable output image signal can be derived.