Lighting apparatus
AssigneeModulex Inc.
InventorGoro Terumichi
Life of this patent
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Abstract
An illumination apparatus includes: a reflector having a first reflection surface with a shape of a surface of revolution, and a downward light emission outlet through which direct light from a light source and reflection light from the first reflection surface being emitted; and a cone having a substantially truncated conical second reflection surface, an upper opening opposing the light emission outlet, and a lower opening having a larger diameter than the upper opening. The cone is positioned outside the optical paths of the controlled reflection light from the first reflection surface.
Claims5
A lighting apparatus comprising:
- a light source;
- a reflector having a first reflection surface with a shape of a surface of revolution, and a downward light emission outlet through which direct light from the light source and reflection light from the first reflection surface being emitted;
- and
- a cone having a substantially truncated conical second reflection surface, an upper opening directly opposing the light emission outlet, and a lower opening having a diameter greater than a diameter of the upper opening,
- wherein the cone is disposed outside an optical path of controlled reflection light from the first reflection surface,
- in a cross section cut along a plane including an optical axis of the light source, an inner periphery edge of the upper opening is defined as a first inner periphery edge, and an inner periphery edge of the lower opening is defined as a second inner periphery edge, and a line connecting the first inner periphery edge and the second inner periphery edge on one side of the optical axis is defined as a first reference line, and a line connecting the first inner periphery edge and the second inner periphery edge on the other side of the optical axis is defined as a second reference line,
- wherein the light source comprises a planar light-emitting surface, and the light-emitting surface is disposed in a region interposed between the first reference line and the second reference line, after the first reference line and the second reference line extend from a cone side to a reflector side and intersect with each other.
Dependencies are inferred from the claim text.