Title:
照明装置
Document Type and Number:
Japanese Patent JP7017707
Kind Code:
B2
Abstract:
To provide a lighting device capable of stably illuminating a desired area with light in which luminance is nearly constant.SOLUTION: A lighting device includes: a plurality of light sources arranged along a predetermined direction; a condenser lens collecting light emitted from the light sources; and a diffusion lens diffusing light that is emitted from the condenser lens in a predetermined direction and emitted from the emitting surface. An emission surface of the diffusion lens is arranged at a position separated by a distance of 2 to 4 times of a curvature radius of the condenser lens from the center of curvature of the condenser lens as a reference, in a direction directed from the plurality of light sources toward the diffusion lens.SELECTED DRAWING: Figure 11
Inventors:
Shinji Hirose
Wakako Takahashi
Wakako Takahashi
Application Number:
JP2020029023A
Publication Date:
February 09, 2022
Filing Date:
February 25, 2020
Export Citation:
Assignee:
Rebox Co., Ltd.
International Classes:
F21V5/00; F21S2/00; F21V5/04; F21V13/02
Domestic Patent References:
| JP2007225591A |
Foreign References:
| US20070064409 |
Attorney, Agent or Firm:
Atsushi Ito
Shiro Kaneki
Shiro Kaneki