Luminaire
AssigneeZumtobel Staff GmbH
InventorsSimona Loga, Georg Kempter
Life of this patent
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Abstract
A luminaire having a tube-shaped gas discharge lamp (1) contains at least one concavely curved reflector (2) arranged—seen from the region to be illuminated—neighboring the lamp (1), and at least one partially light permeable diffusor (3) arranged—likewise seen from the region to be illuminated—neighboring the lamp (1) but before the reflector (2). The diffusor (3) and the reflector (2) bound next to the lamp (1) at least one light entry surface and run together at their ends away from the lamp (1) such that they enclose at least one light chamber (4), the ratio between the width (a) of a light chamber and the height (b) of a light entry surface being at least 4:1. Further, there may be provided means for the attainment for a uniform light density over the width of the reflector.
Claims20
A luminaire comprising:
- a tube-shaped gas discharge lamp;
- at least one concavely curved reflector arranged neighboring said lamp, as seen from a region to be illuminated by said lamp;
- and
- at least one partially light permeable diffusor also arranged neighboring said lamp and positioned in front of said reflector, as seen from said region to be illuminated by said lamp;
- wherein said diffusor and said reflector are spaced apart from each other in a region next to said lamp and run together at their ends away from said lamp, to define at least one light chamber having a light entry surface which is next to said lamp and which has a height, and said light chamber having a width which extends from said light entry surface to said ends, and
- the ratio of said width to said height being a ratio of at least 4:1.
A luminaire comprising:
- a tube-shaped gas discharge lamp;
- at least one concavely curved reflector arranged neighboring said lamp, as seen from a region to be illuminated by said lamp;
- and
- at least one partially light permeable diffusor also arranged neighboring said lamp but in front of said reflector, as viewed from said region to be illuminated by said lamp,
- wherein said diffusor and said reflector bounding, next to said lamp, are spaced apart from each other and run together at their ends away from said lamp, to define at least one light chamber having a light entry surface which is next to said lamp, and which has height, and said light chamber having a width which extends from said light entry surface to said ends,
- said reflector being partially light permeable;
- a further concavely curved reflector arranged behind said reflector, as viewed from said region to be illuminated by said lamp, said reflector and said further reflector forming therebetween at least one further light chamber behind said light chamber;
- and
- a further light source arranged in said further light chamber.
Dependencies are inferred from the claim text.