Light for an aircraft

Patent metadata

Field	Value
Publication number	US-9260201-B2
Application number	US-201213629322-A
Country	US
Kind code	B2
Filing date	Sep 27, 2012
Priority date	Sep 28, 2011
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A light for an aircraft comprises a holder for carrying a first group of light emitting diodes arranged along a curvilinear line and a first reflector having an elliptic reflective partial surface defining a plurality of focal points forming a first curvilinear focal line coinciding with the light emitting sites of the first group of light emitting diodes and second focal point or curvilinear focal line. The light further includes a second optical unit comprising a single further focal point or curvilinear focal line that coincides with the second focal point or focal line of the first reflector. The light further includes a second group of light emitting diodes displaced axially with respect to the first light emitting diodes, which emit light that bypasses the second focal point or focal line of the first reflector of the first optical unit.

First claim

What is claimed is:

1. A light for an aircraft, comprising
a holder for carrying a first group of a plurality of first light emitting diodes arranged along a curvilinear line and comprising light emitting sites for emitting light in a direction away from the curvilinear line,
a first optical unit of a reflective type comprising a first reflector extending around the holder for reflecting light emitted from the first light emitting diodes and defining an optical axis of the first optical unit,
wherein the first reflector comprises an elliptic reflective partial surface defining (i) a plurality of first focal points forming a first curvilinear focal line extending along the light emitting sites of the first light emitting diodes, and (ii) a plurality of second focal points, wherein at least a portion of the elliptic reflective partial surface is arranged so as to face towards the first light emitting diodes,
a second optical unit of a reflective and/or refractive type for emitting light received from the first optical unit into a predetermined area,
wherein the second optical unit comprises a single further focal point or a plurality of further focal points forming a further curvilinear focal line, and
wherein the plurality of the second focal points of the first optical unit
either coincide and are identical to the single further focal point of the second optical unit

or
are located along the further curvilinear focal line of the second optical unit, and

at least a second group of a plurality of second light emitting diodes arranged in at least one section of the first optical unit and displaced with respect to the first light emitting diodes in the direction of the extension of the optical axis of the first optical unit, wherein the plurality of second light emitting diodes are arranged outside of the plurality of first focal points and are arranged within the first reflector for emitting light towards the first reflector,
wherein the second light emitting diodes emit light bypassing the second focal point or points of the first reflector of the first optical unit, with an area illuminated by the light due to the second light emitting diodes being wider than an area illuminated by the light due to the first light emitting diodes.

2. The light according to claim 1 , wherein the second light emitting diodes are arranged within at least two sections diametrically opposite to each other with respect to the optical axis of the first optical unit.

3. The light according to claim 1 , further comprising a
third group of a plurality of third light emitting diodes arranged in at least one further section and displaced with respect to the first light emitting diodes in the direction of the extension of the optical axis of the first optical unit,
wherein the further section of the third light emitting diodes is displaced with respect to the section or sections of the second light emitting diodes in the direction of the extension of the curvilinear line along which the first light emitting diodes are arranged, and
wherein the third light emitting diodes emit light bypassing the second focal point or points of the first reflector of the first optical unit.

4. The light according to claim 3 , wherein the third light emitting diodes are arranged within at least two further sections diametrically opposite to each other with respect to the optical axis of the first optical unit.

5. The light according to claim 1 , wherein a second optical unit comprises an optical lens or a reflector.

6. The light according to claim 1 , wherein the second optical unit comprises a optical collimating lens.

7. The light according to claim 1 , wherein the first reflector further comprises a spheric reflective partial surface adjacent the elliptic reflective partial surface and extending from a portion thereof facing the first light emitting diodes.

8. The light according to claim 7 , wherein the first optical unit comprises a light exiting opening defined by an edge of the elliptic reflective partial surface.

9. The light according to claim 8 , wherein the first light emitting diodes are arranged away from the light exiting opening as well as between the opening and the spheric reflective partial surface.

10. The light according to claim 1 , wherein the plurality of the second focal points of the first optical unit coincide so as to form a single second focal point and wherein the second optical unit comprises a second reflector which is parabolically shaped and defines a light emitting opening for emitting light into a predetermined area and/or with a predetermined light intensity distribution.

11. The light according to claim 1 , wherein the plurality of the second focal points of the first optical unit form a second curvilinear focal line and wherein the second optical unit comprises a second reflector which is parabolically shaped and defines a light emitting opening for emitting light into a predetermined area and/or with a predetermined light intensity distribution.

12. The light according to claim 1 , wherein the first light emitting diodes comprise light emitting diodes of the same or different colors and/or types.

13. The light according to claim 1 , wherein a fourth group of fourth light emitting diodes is located within an area outside of the area through which light from the second optical unit exits and wherein the fourth light emitting diodes of the fourth group emit additional light directed into a predetermined area.

14. The light according to claim 1 , wherein the second group of the plurality of second light emitting diodes is arranged on the holder.

Assignees

• Hessling Andre
• Griesbach Martin
• Goodrich Lighting Systems Gmbh

Inventors

• Hessling Andre
• Griesbach Martin

Classifications

• F21V7/08

  with elliptical curvature · CPC title

• F21V7/0058

  adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources · CPC title

• F21V5/046 Primary

  the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring · CPC title

• F21V7/0016

  on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes · CPC title

• B64D47/06 Primary

  for indicating aircraft presence · CPC title