Picture reader

Abstract

Abstract PURPOSE:To eliminate the need for a circuit correcting the difference in spectral characteristics by providing a spectral characteristic correction means having a spectral characteristic opposite to a spectral characteristic of a diffusion means in a visual light region between a 2nd light source and a photoelectric conversion means. CONSTITUTION:A color correction filter 32 having an opposite spectral characteristic to a spectral characteristic of a white acrylic plate in the visual light region is provided between a light source 31 for reading a picture by a transmission light, the spectral characteristic of the light transmitting through the said white acrylic plate 4 and lighting a transmission original is made nearly the same spectral characteristic as that of the light source 11 for picture reading by a reflected light; an ND filter 33 correcting the luminous quantity of the said light source 31 is provided between the light source 31 and the white acrylic plate 4 to make the luminous quantity of the light transmitted through the said white acrylic plate 4 and radiating the original is mae nearly equal to the luminous quantity of the light source 11. Thus, a correction circuit correcting the difference from the spectral characteristic is not required.

Inventors

• 👤 Masashi Nakayama
• 👤 雅司 中山
• 👤 Hiroyuki Mori
• 👤 浩之 森

Bibliographic Details