Title:
照明装置及び画像読取装置
Document Type and Number:
Japanese Patent JP7025116
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress unevenness of an intensity distribution of emission light in a longitudinal direction of a light guide body and enhance uniformity of an illuminance distribution in a luminaire having a rod-shaped light guide body provided with a light source at an end part.SOLUTION: A luminaire 1 comprises: a rod-shaped light guide body 14; a light source unit 21 provided on an end surface thereof; and a reflector 15 reflecting emission light from the light guide body toward a manuscript reading surface. The light guide body includes: first and second reflection surfaces 32 and 33 diffusing and reflecting incident light from a light source; and a light-emitting surface 31 emitting reflection light from both the reflection surfaces to an outside. The first reflection surface has a first diffusion reflection pattern 35 consisting of a non-continuous pattern part 51 provided in the vicinity of an end surface in a longitudinal direction of the light guide body and a continuous pattern part 52 of a central part. The second reflection surface has a second diffusion reflection pattern 36 reducing unevenness in the longitudinal direction of quantity of light being reflected and emitted from the first diffusion reflection pattern.SELECTED DRAWING: Figure 2
Inventors:
Fumisa Amemiya
Application Number:
JP2016167610A
Publication Date:
February 24, 2022
Filing Date:
August 30, 2016
Export Citation:
Assignee:
Seiko Epson Corporation
Canon Finetech Nisca Inc.
Canon Finetech Nisca Inc.
International Classes:
H04N1/04; G03B27/54; H04N1/028
Domestic Patent References:
| JP2008219244A | ||||
| JP200654635A |
Attorney, Agent or Firm:
Yoshiaki Nishiyama
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