| 摘要 |
A luminous flux control member can stabilize an optical performance, make manufacturing easy and improve efficiency of use of light at the same time. A reflection surface (15) is formed in a surface shape, so that an extreme end section of the reflection surface (15) that is the most distant from an emission area (5) is positioned further inward in the radial direction than a base end section that is the closest to the emission area (5), and the reflection surface (15) intersects once a virtual surface that is inclined with respect to an optical axis connecting between the extreme end section and the base end section. The surface shape suppresses an offset of a light distribution of light emitted from the emission area (5) from a designed light distribution due to an offset between an optical axis and the center axis of light emitted from a light source.
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