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Title:
LIGHT FLUX CONTROL MEMBER, LIGHT-EMITTING DEVICE AND LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/009798
Kind Code:
A1
Abstract:
This light flux control member (140) comprises a first light flux control member (150) and a second light flux control member (160). The first light flux control member (150) comprises: an entry region (151) including a Fresnel lens portion (152) and an entry surface (155); an exit surface (156); and a reflective surface (157). The second light flux control member (160) comprises a transmissive and reflective surface (165). The reflective surface (157) is a rotationally symmetric surface with the central axis of the first light flux control member (150) as the rotation axis, and the reflective surface (157) is formed such that the generatrix of the reflective surface (157) is a concave curve relative to the entry surface (155) and such that the outer peripheral portion of the reflective surface (157) is distanced farther from an orthogonal plane compared to the inner peripheral portion thereof in a direction that follows an optical axis LA, which is the center of the total light flux of at least one light-emitting element (130), said orthogonal plane passing through an arbitrary point on the entry surface (155) and being orthogonal to the optical axis LA.

Inventors:
NAKAMURA, Masato
Application Number:
JP2015/068112
Publication Date:
January 21, 2016
Filing Date:
June 24, 2015
Export Citation:
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Assignee:
ENPLAS CORPORATION (2-30-1, Namiki Kawaguchi-sh, Saitama 34, 〒3320034, JP)
International Classes:
F21V5/04; F21S2/00; F21V3/00; F21V5/00; F21V7/00; F21V13/00
Domestic Patent References:
WO2014054226A12014-04-10
WO2014041745A12014-03-20
WO2013118448A12013-08-15
Foreign References:
JP2014103062A2014-06-05
JP2013140318A2013-07-18
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg. 1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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