Shaped optical waveguide bodies

Patent metadata

Field	Value
Publication number	US-10436970-B2
Application number	US-201313841622-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

Disclosed is an optical waveguide body having a first surface that includes one or more tapered portions displaced between an input surface and an end surface or edge of the waveguide body. A second surface displaced from and opposite the first surface may also include one or more tapered portions between the input surface wherein the furthest tapered portions of the first and second surface forms and end surface or edge.

First claim

What is claimed is:

1. An optical waveguide, comprising:
a first optical waveguide body comprising a first end extending along a length dimension of the first optical waveguide body comprising a first thickness adapted to receive light;
a plurality of LEDs disposed adjacent the first end along the length dimension thereof;
a second end extending along the length dimension of the optical waveguide opposite the first end comprising a second thickness less than the first thickness;
wherein an extent of the length dimension extending along the first end is greater than an extent of a dimension extending between the first end and the second end;
wherein a second optical waveguide body intersects with the first optical waveguide body to define a first portion of the first optical waveguide body and a second portion of the first optical waveguide body;
the first portion of the first optical waveguide body comprising:
a series of first cascading surfaces spaced from one another and extending from the first end to the second end, wherein the series of first cascading surfaces are substantially parallel to a central axis of the first optical waveguide body;
a series of second surfaces each disposed between each adjacent pair of first cascading surfaces of the series of first cascading surfaces and connecting with each adjacent pair of first cascading surfaces at two vertices forming acute angles with respect to such adjacent pair of first cascading surfaces, wherein the series of first cascading surfaces and the series of second surfaces extend longitudinally along the length dimension of the first portion of the first optical waveguide body, wherein the received light is extracted out of the series of first cascading surfaces and the series of second surfaces; and
a third surface opposite the series of first cascading surfaces and the series of second surfaces and disposed between the first end and the second end, wherein the third surface is planar;

the second portion of the first optical waveguide body comprising:
a series of fourth cascading surfaces spaced from one another and extending from the first end to the second end, wherein the series of fourth cascading surfaces are substantially parallel to a central axis of the first optical waveguide body;
a series of fifth surfaces each disposed between each adjacent pair of fourth cascading surfaces of the series of fourth cascading surfaces and connecting with each adjacent pair of fourth cascading surfaces at two vertices forming acute angles with respect to such adjacent pair of fourth cascading surfaces, wherein the series of fourth cascading surfaces and the series of fifth surfaces extend longitudinally along the length dimension of the second portion of the first optical waveguide body, wherein the received light is extracted out of the series of fourth cascading surfaces and the series of fifth surfaces; and
a sixth surface opposite the series of fourth cascading surfaces and the series of fifth surfaces and disposed between the first end and the second end, wherein the sixth surface is planar; and

wherein the first and second optical waveguide bodies are disposed within a suspended lighting device.

2. The optical waveguide of claim 1 , wherein each of the series of first cascading surfaces are substantially parallel.

3. The optical waveguide of claim 1 , wherein each of the series of second surfaces are substantially parallel.

4. An optical waveguide, comprising:
a first optical waveguide body comprising a first end extending along a length dimension of the optical waveguide comprising a first thickness adapted to receive light;
a plurality of LEDs disposed along the length dimension and emitting light into the first end;
a second end extending along the length dimension of the optical waveguide opposite the first end comprising a second thickness less than the first thickness;
wherein the length dimension of the first end is greater than another length dimension extending between the first end and the second end;
wherein at least one second optical waveguide body intersects with the first optical waveguide body to define a first portion of the first optical waveguide body and a second portion of the first optical waveguide body;
the first portion of the first optical waveguide body comprising:
a series of first cascading surfaces spaced from one another disposed between the first end and the second end;
a series of second surfaces each disposed between each adjacent pair of cascading surfaces of the series of first cascading surfaces and connecting each adjacent pair of cascading surfaces of the series of first cascading surfaces together, and disposed at an angle with respect to each adjacent pair of cascading surfaces of the series of first cascading surfaces, wherein each of the series of first cascading surfaces is planar throughout a full extent thereof, wherein the series of first cascading surfaces and the series of second surfaces extend longitudinally along the length dimension of the first portion of the first optical waveguide body; and
a third surface opposite the series of first cascading surfaces and the series of second surfaces and disposed between the first end and the second end, wherein each of the series of first cascading surfaces tapers toward the third surface with distance from the first end;
the second portion of the first optical waveguide body comprising:
a series of fourth cascading surfaces spaced from one another disposed between the first end and the second end;
a series of fifth surfaces each disposed between each adjacent pair of cascading surfaces of the series of fourth cascading surfaces and connecting each adjacent pair of cascading surfaces of the series of fourth cascading surfaces together, and disposed at an angle with respect to each adjacent pair of cascading surfaces of the series of fourth cascading surfaces, wherein each of the series of fourth cascading surfaces is planar throughout a full extent thereof, wherein the series of fourth cascading surfaces and the series of fifth surfaces extend longitudinally along the length dimension of the second portion of the first optical waveguide body; and
a sixth surface opposite the series of fourth cascading surfaces and the series of fifth surfaces and disposed between the first end and the second end, wherein each of the series of fourth cascading surfaces tapers toward the sixth surface with distance from the first end; and
wherein the optical waveguide is mounted within a suspended lighting device.

5. The optical waveguide of claim 4 , wherein each of the series of first cascading surfaces are substantially parallel.

6. The optical waveguide of claim 4 , wherein each of the series of second surfaces are substantially parallel.

7. The optical waveguide of claim 4 , wherein the third surface and the sixth surface are planar.

8. The optical waveguide of claim 4 , wherein each of the series of second surfaces is substantially normal to a central axis of the waveguide.

9. The optical waveguide of claim 4 , wherein the light is directed outwardly from the third surface and the sixth surface.

Assignees

• Cree Inc
• Ideal Ind Lighting Llc

Inventors

• Durkee John W

Classifications

• G02B6/0018

  Redirecting means on the surface of the light guide · CPC title

• G02B6/0046 Primary

  Tapered light guide, e.g. wedge-shaped light guide · CPC title

• G02B6/0063

  for extracting light out both the major surfaces of the light guide · CPC title

• G02B6/0045

  by shaping at least a portion of the light guide · CPC title

• G02B6/0038

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title