Title:
レンズ、照明装置及び照明器具
Document Type and Number:
Japanese Patent JP7126126
Kind Code:
B2
Abstract:
To improve light distribution characteristics in a direction intersecting with one direction, while distributing light in the one direction.SOLUTION: A lens body 30 has: a second incidence surface 322 that is provided on the surface of a second recess 31B and to which light radiated from an LED module is incident; and a second emission surface 332 that is provided on the surface of the lens body 30 and is parallel to an optical axis A1 to face the second incidence surface 322. In a first virtual plane in parallel with a reference surface N1, a first distance between a first incidence surface and a first emission surface and a second distance between the second incidence surface 322 and the second emission surface 332 becomes longer according as a distance between the first virtual plane VS1 and the reference surface N1 becomes shorter. In a cross-sectional shape obtained when the lens body 30 is cut in a second virtual plane VS2 that is parallel to the optical axis A1 and intersects with in an alignment direction of a first recess 31A and the second recess 31B, outlines of the second incidence surface 322 have an identical shape regardless of distances between a second virtual plane VS2 in the alignment direction and the optical axis A1.SELECTED DRAWING: Figure 9
Inventors:
Kyohei Nakamura
Naoki Tomoda
Naoki Tomoda
Application Number:
JP2018191977A
Publication Date:
August 26, 2022
Filing Date:
October 10, 2018
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G02B3/04; F21S9/02; F21V5/00; F21V5/04
Domestic Patent References:
| JP2013093200A | ||||
| JP2012048881A | ||||
| JP2018029182A |
Foreign References:
| WO2011076214A1 | ||||
| US20150078011 | ||||
| US20150338055 |
Attorney, Agent or Firm:
Patent business corporation Hokuto patent office