Laser illuminated vehicle lighting system utilizing a turning prism

• US 5,857,770 A
• Filed: 03/24/1997
• Issued: 01/12/1999
• Est. Priority Date: 03/24/1997
• Status: Expired due to Term

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Motor Company
• Inventors: Fohl, Timothy, Remillard, Jeffrey Thomas, Marinelli, Michael Anthony, O'Neil, David Allen
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): Spark, Matthew J.
• Application Number:
  US08/822,023
• Time in Patent Office: 659 Days
• Field of Search: 362/61, 362/32, 362/259, 362/31, 362/511, 362/509, 362/541, 362/551, 362/553
• US Class Current: 362/511
• CPC Class Codes: F21S 43/239 plate-shaped
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/247 with a single light source being coupled into the light guide
• CPC Class Codes: F21S 43/251 the light guides being used to transmit light from remote light sources
• CPC Class Codes: G02B 6/0018 Redirecting means on the surface of the light guide
• CPC Class Codes: G02B 6/0048 with stepwise taper

Abstract

A lighting system for an automotive vehicle includes a remote laser light source coupled with a light transmitting fiber optic light guide which illuminates a thin sheet optical element tail lamp having a manifold portion, a kicker portion adjacent and substantially parallel to the manifold portion, and a turning prism adjacent to and in optical communication with the manifold and kicker portions for receiving light from the manifold portion and internally reflecting and redirecting light to the kicker portion.

Claims

1. A tail lamp for use in an automotive vehicle, said tail lamp comprising:

a substantially planar manifold portion receives laser light from a laser light source, expands the laser light and transmits the laser light internally along a length of the manifold;

a substantially planar kicker portion is offset from, overlapping and substantially parallel to the manifold portion, the kicker portion has a plurality of stepped surfaces spaced from and angled with respect to the manifold portion, the kicker portion receives the laser light and redirects the laser light out of the kicker portion by reflection from the stepped surfaces; and

a prism adjacent to and in optical communication with the manifold and kicker portions, wherein the manifold portion, kicker portion and prism form a single piece construction tail lamp and form a u-shaped cross section thereby, wherein a first leg of the u-shape cross-section is the manifold portion and a second leg of the u-shape is the kicker portion, whereby the prism receives the laser light from the manifold portion and internally reflects and redirects the laser light offset from and one hundred and eighty degrees to the direction of the light from when the light enters the manifold portion to the kicker portion.