LED low profile linear front fog module
First Claim
1. A fog lamp (1) emitting light in a generally forward direction (Z), comprising:
- a light emitting diode (LED) (3) having an optical axis (8) generally parallel to the forward direction (Z);
a refractive/TIR lens (4) receiving light directly from the LED (3) and producing converging light, the converging light converging to a focus (F) along the optical axis (8);
a light baffle (5) disposed proximate the focus (F), the light baffle (5) having an aperture (55) centered on the optical axis (8) and elongated along a lateral direction (X), wherein the converging light that passes through the aperture (55) forms diverging light; and
an anamorphic lens (6) having more optical power along a vertical direction (Y) than along the lateral direction (X), wherein the diverging light that passes through the anamorphic lens (6) forms an emergent beam, wherein the emergent beam has a wider divergence along the lateral direction (X) than along the vertical direction (Y).
1 Assignment
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Accused Products
Abstract
A fog lamp for a vehicle is disclosed. Light leaving an LED is collected by a refractive/TIR lens. The central portion of the refractive/TIR lens is purely refractive, while the peripheral portion of the lens includes a total internal reflection off an exterior surface of the lens. The refractive/TIR lens converges the light to a focus at or near a laterally-elongated aperture in a light baffle. Light exiting the aperture diverges and passes through an anamorphic lens, which reduces the angular extent of the beam in the vertical direction and increases the angular extent in the lateral direction. The full fog lamp may include multiple pairs of LEDs and respective refractive/TIR lenses, all arranged coplanar, parallel and laterally adjacent to each other. The LED/lens pairs may all direct light through a single light baffle and through a single anamorphic lens.
12 Citations
16 Claims
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1. A fog lamp (1) emitting light in a generally forward direction (Z), comprising:
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a light emitting diode (LED) (3) having an optical axis (8) generally parallel to the forward direction (Z); a refractive/TIR lens (4) receiving light directly from the LED (3) and producing converging light, the converging light converging to a focus (F) along the optical axis (8); a light baffle (5) disposed proximate the focus (F), the light baffle (5) having an aperture (55) centered on the optical axis (8) and elongated along a lateral direction (X), wherein the converging light that passes through the aperture (55) forms diverging light; and an anamorphic lens (6) having more optical power along a vertical direction (Y) than along the lateral direction (X), wherein the diverging light that passes through the anamorphic lens (6) forms an emergent beam, wherein the emergent beam has a wider divergence along the lateral direction (X) than along the vertical direction (Y). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification