Title:
ILLUMINATING DEVICE, METHOD FOR DETERMINING DISPOSITION OF LIGHT-GUIDING PLATE, AND PRINTING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/112496
Kind Code:
A1
Abstract:
The present invention provides an illuminating device, a method for determining disposition of a light-guiding plate, and a printing system, in which the appropriate disposition of a light-guiding plate is defined according to the condition of the light-guiding plate. In an illuminating device provided with a light-guiding plate (32) that utilizes total reflection, the light-guiding plate is disposed at a position where the distance from an emission surface (35) to a region to be illuminated is greater than or equal to Lt, which is calculated by Lt = ((1/2)×(n1/n2)×W)/tanθimax where W is the total length in the thickness direction of the light-guiding plate, n1 is the refractive index of the periphery of the light-guiding plate, n2 is the refractive index of the light-guiding plate, and θimax is the maximum incident angle on a first surface according to the number of times of reflection.
Inventors:
NAGASHIMA KANJI (JP)
Application Number:
PCT/JP2022/039842
Publication Date:
June 22, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
F21S2/00; B41J2/01; G06T1/00; H04N1/04; H04N1/12; F21Y115/10
Foreign References:
| JP2006017951A | 2006-01-19 | |||
| JP2006067551A | 2006-03-09 |
Attorney, Agent or Firm:
MATSUURA, Kenzo (JP)
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