Title:
A light flux control member, a luminescent device, and a lighting installation
Document Type and Number:
Japanese Patent JP5964714
Kind Code:
B2
Abstract:
Light flux control member (140) has first light flux control member (141) and second light flux control member (142) facing first light flux control member (141). First light flux control member (141) and second light flux control member (142) both have central axes which coincide with optical axis (LA) of a light emitting element. In inclined Fresnel lens (162) of first light flux control member (141), the distance from troughs between annular projections (162a) to lower side step (151) in optical axis (LA) direction is small for outer troughs, and gradually increases for troughs closer to optical axis (LA). According to the present invention, a light flux control member which, from among the front, side, and rear, is capable of balanced distribution of light in at least two of those directions, a light emitting device, and an illumination device can be provided.
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Inventors:
Masato Nakamura
Application Number:
JP2012223224A
Publication Date:
August 03, 2016
Filing Date:
October 05, 2012
Export Citation:
Assignee:
Enplus Inc.
International Classes:
F21K9/232; F21K9/68; F21K9/69
Domestic Patent References:
| JP2012185949A | ||||
| JP201248950A | ||||
| JP2011175978A | ||||
| JP201298691A |
Foreign References:
| WO2012005008A1 | ||||
| WO2011010535A1 |
Attorney, Agent or Firm:
Koichi Washida
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