Nidec Sankyo Corporation

Daigo Ogura

Masahiro Ikeda

Chisato Hiyama

An information reading may include an imaging element; a transparent placing member on which the information recording medium is placed; a first illuminator configured to irradiate a back side of the information recording medium placed on the placing member, with light; a second illuminator configured to irradiate a top side of the information recording medium placed on the placing member, with light; a first optical system configured to read information recorded on the back side of the information recording medium placed on the placing member; a second optical system configured to read information recorded on the top side of the information recording medium placed on the placing member; and an image-forming optical system configured to cause light passing through the first optical system to form an image onto the imaging element and cause light passing through the second optical system to form an image on the imaging element.

Information reading device and method of adjusting information reading device

An information reading device that optically reads information recorded on an information recording medium may include a transparent placement member; a first illumination light a second illumination light a first optical system to read information on the lower surface of the information recording medium; a second optical system to read information on the upper surface of the information recording medium; and a cover member. The second optical system may include a reflection mirror. A medium disposition part may be formed by the placement member and the cover member. The upper surface portion and the side surface portions may be transparent. The second illumination light may be disposed on outer sides of the medium disposition part in the left-right direction. Light emitted from the second illumination light and transmitted through the side surface portions may be irradiated onto the upper surface of the information recording medium placed on the placement member.

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Nagano, Japan

Daigo Ogura