Illumination system, luminaire, collimator, and display device

摘要

The invention relates to an illumination system (10), a luminaire (102), a collimator (30), and a display device (200). The illumination system according to the invention comprises a light source (20) and the collimator. The light source is configured to emit a substantially Lambertian light distribution around an axis of symmetry (22). The refractive collimator is configured to redirect light from the light source so as to at least partially illuminate an illuminating surface (50), in which at least a part of the illuminating surface is substantially parallel to the axis of symmetry. The refractive collimator comprises a concave entrance window (34) and an at least partially convex exit window (40) for refracting light towards the illuminating surface.;The illumination system according to the invention has the effect that a height of the illumination system may be reduced by virtue of the use of the refractive collimator.

主权项

1. An illumination system comprising:
a light source for emitting light with a basic emission distribution around a symmetry axis, and a collimator for redirecting light from the light source to substantially homogeneously illuminate at least a part of an illuminating surface, at least a part of the homogeneously illuminated illuminating surface extending substantially parallel to the symmetry axis, the collimator comprising a concave input window for receiving light from the light source, and further comprising an at least partially convex output window for directing light towards the illuminating surface, a convex part of the output window being shaped for refracting light emitted by the light source in a direction away from the illuminating surface back towards the illuminating surface and for generating an altered emission distribution being asymmetric with respect to the symmetry axis of the basic emission distribution to substantially homogeneously illuminate the at least part of the illuminating surface.