NEAR FIELD LENS WITH SPREAD CHARACTERISTICS

• US 20070064431A1
• Filed: 09/22/2005
• Published: 03/22/2007
• Est. Priority Date: 09/22/2005
• Status: Active Grant

• Current Assignee: Varroc Lighting Systems S.R.O. (Varroc Engineering Limited)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Chinniah, Jeyachandrabose, Erion, Jeffrey, Narayanan, Subramanian, Sayers, Edwin, Fallahi, Amir
• Granted Patent: US 7,207,700 B2
• Time in Patent Office: Days
• US Class Current: 362/334
• CPC Class Codes: F21S 41/285 Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
• CPC Class Codes: F21S 43/26 Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• CPC Class Codes: F21S 43/40 characterised by the combination of reflectors and refractors
• CPC Class Codes: F21W 2102/00 Exterior vehicle lighting devices for illuminating purposes
• CPC Class Codes: F21W 2103/00 Exterior vehicle lighting devices for signalling purposes
• CPC Class Codes: F21W 2103/20 Direction indicator lights
• CPC Class Codes: F21W 2103/35 Brake lights
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00

Abstract

A near field lens is for an automotive light assembly, generally comprising a central body positioned between opposing side bodies. The central body extends in a vertical direction, while the side bodies are positioned on horizontal sides of the central body. The opposing side bodies are structured to collimate the light both horizontally and vertically, while the central light body is structured to collimate the light vertically but not substantially collimate the light horizontally.

Claims

1. A near field lens for an automotive light assembly having a light source, the lens directing light outwardly along a longitudinal axis, the lens comprising:

a central body positioned between opposing side bodies, the central body extending in a vertical direction, the side bodies positioned on horizontal sides of the central body;

a pocket defined at least one of the central body and the opposing side bodies, the pocket receiving light from the light source;

the opposing side bodies structured to collimate the light both horizontally and vertically; and

the central body structured to collimate the light vertically but not substantially collimate the light horizontally.

2. The lens of claim 1, wherein the central body and the opposing side bodies share a similar cross-sectional shape.

3. The lens of claim 2, wherein the structure of the central body corresponds to an linear extrusion of the cross-sectional shape along the horizontal direction.

4. The lens of claim 2, wherein the structure of the opposing side bodies corresponds to a rotational extrusion of the cross-sectional shape about the longitudinal axis.

5. The lens of claim 1, wherein the cross-sectional shape corresponds to that of a Fresnel lens.

6. The lens of claim 1, wherein the central body includes an inner longitudinally facing surface and an inner radially facing surface, and wherein the inner longitudinally facing surface and an inner radially facing surface both extend parallel to a horizontal axis of the lens.

7. The lens of claim 1, wherein the central body includes an outer radially facing surface that extends parallel to a horizontal axis of the lens.

8. The lens of claim 1, wherein each of the side bodies includes an inner longitudinally facing surface and an inner radially facing surface, and wherein the inner longitudinally facing surface and inner radially facing surface are curved relative to a horizontal axis of the lens.

9. The lens of claim 1, wherein the pocket is defined by an inner longitudinally facing surface and an inner radially facing surface.

10. The lens of claim 9, wherein the inner longitudinally facing surface is shaped as a lens focusing light longitudinally.

11. The lens of claim 9, wherein the inner radially facing surface is curved to refract light towards an outer radially facing surface.

12. The lens of claim 11, wherein the outer radially facing surface redirects light longitudinally.

13. The lens of claim 9, wherein the inner radially facing surface is structured as a Fresnel lens.

14. The lens of claim 9, wherein the inner radially facing surface includes a series of angled ribs.

15. The lens of claim 9, wherein the ribs formed on the central body extend parallel to the horizontal axis.

16. The lens of claim 1, wherein the horizontal width of the central body is sized to provide a horizontal beam spread meeting a desired automotive beam spread pattern.

17. The lens of claim 1, wherein the side bodies are joined by a central hub, the central hub position upstream of the central body.

18. The lens of claim 17, wherein the central body defines an inner longitudinally facing surface that is shaped to collimate the light vertically through refraction.

19. The lens of claim 17, wherein an air pocket is formed between the central hub and the central body.

20. A near field lens for an automotive light assembly having a light source, the lens directing light outwardly along a longitudinal axis in a beam pattern, the lens comprising:

a central body positioned between opposing side bodies, the central body extending in a vertical direction, the side bodies positioned on horizontal sides of the central body;

a pocket defined at least one of the central body and the opposing side bodies, the pocket receiving light from the light source;

the opposing side bodies structured to collimate the light both horizontally and vertically; and

the central body structured to collimate the light vertically and provide a horizontal beam spread to the beam pattern that exceeds the horizontal beam width provided by the opposing side bodies.