Title:
光学装置および照明装置
Document Type and Number:
Japanese Patent JP7360012
Kind Code:
B2
Abstract:
To provide an optical device that outputs Lambertian distribution light as a linear or rectangular light the luminous intensity distribution of which is close to uniform and which is suitable for the lighting of an area.SOLUTION: The optical device comprises: a first reflection surface arranged so as to reflect at least a portion of a first light incident along a first axis and having such a light distribution characteristic as being equipped with an optical axis parallel to the first axis to an approximately circular arc first range around the first axis, the first reflection surface including a plurality of reflection arc surfaces divided in a direction along the first axis; a second and a third reflection surface intersecting the first axis and arranged so as to sandwich the first reflection surface; and a light-transmissive emission surface for deflecting at least some of the lights reflected by the plurality of reflection arc surfaces and outputting it to the periphery of the first axis, the cross section of the emission surface along the first axis including a cyclically recessed and projected pattern.SELECTED DRAWING: Figure 15
Inventors:
Takanori Ariga
Hiroyuki Itahana
Yoshinori Momose
Kazu Kitahara
Hiroyuki Itahana
Yoshinori Momose
Kazu Kitahara
Application Number:
JP2019119942A
Publication Date:
October 12, 2023
Filing Date:
June 27, 2019
Export Citation:
Assignee:
Nichia Corporation
International Classes:
G02B5/10; F21S2/00; F21V5/04; F21V11/02; G02B5/00; G02B5/04
Domestic Patent References:
| JP3173449U | ||||
| JP2016001262A | ||||
| JP2010032902A | ||||
| JP2012084298A | ||||
| JP2020004563A |
Foreign References:
| US20050024744 | ||||
| CN102985751A | ||||
| CN104976567A | ||||
| WO2014156915A1 |
Attorney, Agent or Firm:
Akira Imai