Illuminating spotlight projector and lighting installation with offset light source
AssigneeFD Eclairage
InventorFrancis David
Life of this patent
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Abstract
The invention concerns an illuminating spotlight emitting a narrow beam. The spotlight has a highly concentrated light source and a concave reflector for emitting an illuminating beam in a specific direction, along an emitting axis. A converging lens is interposed between the source and the reflector and in a plane passing through a conical segment. The source is bordered laterally on the reflector side with a sector of the converging lens providing a virtual image of the source located beyond the emitting axis, on the side opposite that of the lens. The virtual image of the light source is formed at the focus of the conical segment locally defining the reflector.
Claims10
Illuminating spotlight emitting a narrow beam, comprising a highly concentrated light source and a concave reflector for emitting an illuminating beam in a given direction, along an axis of emission characterised by
- a convergent lens positioned between the source and the reflector, and
- in a plane passing through the axis of emission:
- the concave reflector is being defined locally by a conic section,
- the source is being bordered laterally on the side of the reflector by a sector of the convergent lens giving a virtual image of the source, which virtual image is situated beyond the axis of emission, on the other side from the lens,
- the virtual image of the light source being formed at the focal point of the conic section locally defining the reflector.
Lighting installation having an offset light focal point, characterised by a narrow beam emitting spotlight, comprising a highly concentrated light source and a concave reflector for emitting an illuminating beam in a given direction, along an axis of emission and having
- a convergent lens positioned between the source and the reflector, and
- in a plane passing through the axis of emission:
- the concave reflector being defined locally by a conic section,
- the source being bordered laterally on the side of the reflector by a sector of the convergent lens giving a virtual image of the source, which virtual image is situated
- the concave reflector being defined locally by a conic section,
- the source being bordered laterally on the side of the reflector by a sector of the convergent lens giving a virtual image of the source, which virtual image is situated beyond the axis of emission, on the other side from the lens,
- the virtual image of the light source being formed at the focal point of the conic section locally defining the reflector, and at least one mirror located in the axis of emission and directing the light towards die surface to be illuminated.
Dependencies are inferred from the claim text.