Title:
光照射装置、画像読取装置及び画像形成装置
Document Type and Number:
Japanese Patent JP6520402
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a light irradiation device capable of highly accurately positioning a light guide body without deteriorating an illuminance property in a lighted region.SOLUTION: The light irradiation device comprises: a light source 43; a substrate 63; a light guide body 41; a transparent member that holds a document; and a tabular member 64 that positions and holds the substrate and the light guide body. The light source 43 is either a light-emitting body that is long in a main scan direction or a plurality of light-emitting elements that are arranged side by side in the main scan direction. The light guide body 41 is long in the main scan direction, includes at least one incidence plane 41a and one emission plane 41b and a plurality of side faces 41c, 41d and 41e, and comprises at least one projection 61 that is formed integrally in the main scan direction. The projection 61 is formed on a side face at a smaller tilt angle with respect to a direction in which strongest light moves forwards out of light beams from the light source 43, among the plurality of side faces of the light guide body 41 and at a position closer to the emission plane than to the incidence plane, and fitted with a hole 62 that is formed in the tabular member 64.SELECTED DRAWING: Figure 15
Inventors:
Akihiro Iwamatsu
Application Number:
JP2015108693A
Publication Date:
May 29, 2019
Filing Date:
May 28, 2015
Export Citation:
Assignee:
株式会社リコー
International Classes:
H04N1/04; G03B27/54; G06T1/00; H04N1/028
Domestic Patent References:
| JP2012129974A | ||||
| JP2014042187A |
Attorney, Agent or Firm:
Chieko Tateno