Light flux controlling member, light emitting apparatus, and illumination apparatus
AssigneeEnplas Corporation
InventorsNoriyuki Kawahara, Akinobu Seki
Life of this patent
Estimating the term…
Abstract
Light flux controlling member (140) includes: light controlling emission surface (141) for controlling the distribution of light emitted from light emitting element (130); back surface (143) that is positioned on a side opposite light controlling emission surface (141); boss (145) that is formed on back surface (143) side; and annular concave part (146) that is formed in the vicinity of a base end of boss (145). Annular concave part (146) has inside surface (146a) that is smoothly connected to an outer peripheral surface of the base end of boss (145) and that has an arc-shaped cross-section in an axial direction of boss (145).
Claims6
A light flux controlling member comprising:
- a light controlling emission surface for controlling the distribution of light emitted from a light emitting element;
- a back surface that is positioned on a side opposite to the light controlling emission surface;
- a positioning boss that is formed on the back surface side;
- and
- an annular concave part that is formed to surround a base end of the boss,
- wherein the annular concave part has an inside surface that is smoothly connected to an outer peripheral surface of the base end of the boss and that has an arc-shaped cross-section in an axial direction of the boss.
Dependencies are inferred from the claim text.