Luminaire and Illumination System

A luminaire comprising:

• at least one light-emitting semiconductor chip having a main emission side;
• and
• a reflector having a reflection side facing the main emission side, the reflection side being a freeform different from a circle, an ellipse, a parabola or a hyperbola when seen in cross-section,
• wherein a base line of the luminaire runs through the main emission side and a local height of the reflection side is measured against the base line,
• wherein a local focal length of the reflection side is increased along the local height, concerning ray bundles coming in parallel with the base line during from an exterior of the luminaire during operation, and
• wherein local heights do not have a common focal point.

A luminaire comprising:

• at least one light-emitting semiconductor chip having a main emission side;
• and
• a reflector having a reflection side facing the main emission side, the reflection side being a freeform different from a circle, an ellipse, a parabola or a hyperbola when seen in cross-section,
• wherein a base line of the luminaire runs through the main emission side and a local height of the reflection side is measured against the base line,
• a local focal length of the reflection side is increased along the local height concerning ray bundles coming in parallel with the base line from an exterior of the luminaire during operation,
• wherein local heights do not have a common focal point,
• wherein the reflection side when seen in cross-section opens more rapidly than a normal parabola,
• wherein the base line is in parallel with a mounting plane of the luminaire,
• wherein an angle between the base line and a direction of maximum emission of the luminaire is at least 2° and at most 15°, the direction of maximum emission pointing away from the mounting plane, and
• wherein the base line runs through the main emission side so that the base line and the main emission side have a point of intersection.