Luminaire with hollow optical systems

A luminaire, comprising:

• multiple light-emitting elements (LEEs);
• and
• first and second walls extending along a first direction from first ends proximate the LEEs to second ends, the first and second walls having light-reflective surfaces facing each other, the light-reflective surfaces being spaced apart by a hollow channel;
• wherein, in a cross-sectional plane parallel to the first direction, the light-reflective surfaces of the first and second walls have first portions that curve in opposite directions and third portions that curve in like directions;
• and
• wherein the first portions are arranged proximate the LEEs to provide an input aperture for receiving light from the LEEs, the third portions are arranged to provide an exit aperture for outputting light into an ambient environment, and the first and second walls are configured to propagate light from the input aperture to the exit aperture.

A luminaire, comprising:

• a plurality of light emitting elements;
• and
• a hollow light guide comprising a pair of walls each extending along an axis of the luminaire from the light emitting elements to an exit aperture, a first surface of a first of the pair of walls being separated from the first surface of a second of the pair of walls in a direction orthogonal to the axis by a channel along which the hollow light guide directs light from the light emitting elements to the exit aperture, wherein, in cross-section, the walls define
• a first portion extending along the axis in which the first surfaces of the pair of walls curve in opposite directions,
• a second portion extending along the axis following the first portion in which the first surfaces of the pair of walls are parallel, and
• a third portion extending along the axis following the second portion in which the first surfaces of the pair of walls curve in the same direction;
• and
• a base supporting the plurality of light emitting elements.