Lightguide module

Patent metadata

Field	Value
Publication number	US-9574734-B2
Application number	US-201113198999-A
Country	US
Kind code	B2
Filing date	Aug 5, 2011
Priority date	Aug 6, 2010
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A lightguide module having a linear collimator produced from optically transparent material, a toroidal lens produced from optically transparent material, and a light source, wherein the toroidal lens is disposed between the linear collimator and the light source, at the exit of the linear collimator are found scattering elements, and wherein a light-emitting part of the light source is directed toward an entry surface of the toroidal lens and an exit surface of the toroidal lens is directed toward entry surfaces of the linear collimator. The light source may be a light-emitting diode and the toroidal lens may be a Fresnel type lens.

First claim

What is claimed is:

1. A light guide module, consisting essentially of:
a single light source having an optical center with a light-emitting part for emission of light beams;
a single toroidal lens detached and spaced from the light source having a form created by rotation of a profile of a convex lens about an axis of revolution, the axis of revolution passing through the optical center of the light source and being perpendicular to an optical axis of the light guide module, the toroidal lens having a concave entry surface for entry of the light beams of the light source and a convex exit surface for exit of the light beams in a direction parallel or nearly parallel with a plane perpendicular to the axis of revolution; and
a linear collimator being of plate form having in cross section one dimension substantially larger than in another direction perpendicular to it, the linear collimator having an entry surface for entry of the light beams of the toroidal lens and an exit surface for exit of the light beams in a direction of the optical axis of the light guide module, and having outer reflection surfaces being parallel with the plane perpendicular to the axis of revolution for total internal reflection of the light beams nearly parallel with the plane perpendicular to the axis of revolution.

2. A light guide module, consisting essentially of:
a single light source detached and spaced from the light source having an optical center with a light-emitting part for emission of light beams;
a single toroidal lens detached and spaced from the light source having a form created by rotation of a profile of a convex lens about an axis of revolution, the axis of revolution passing through the optical center of the light source and being perpendicular to an optical axis of the light guide module, the toroidal lens having an entry surface for entry of the light beams of the light source and an exit surface for exit of the light beams in a direction parallel or nearly parallel with a plane perpendicular to the axis of revolution; and
a linear collimator being of plate form having in cross section one dimension substantially larger than in another direction perpendicular to it, the linear collimator having a concave entry surface for entry of the light beams of the toroidal lens and a convex exit surface for exit of the light beams in a direction of the optical axis of the light guide module, and having outer side reflection surfaces being parallel with the axis of revolution for total internal reflection of the light beams in the direction of the optical axis of the light guide module, whereas the light beams form with a normal of the side reflection surfaces an angle being greater than a limit angle for total internal reflection.

3. A light guide module, consisting essentially of:
a single light source having an optical center with a light-emitting part for emission of light beams;
a single toroidal lens detached and spaced from the light source having a form created by rotation of a profile of a convex lens about an axis of revolution, the axis of revolution passing through the optical center of the light source and being perpendicular to an optical axis of the light guide module, the toroidal lens having a concave entry surface for entry of the light beams of the light source and a convex exit surface for exit of the light beams in a direction parallel or nearly parallel with a plane perpendicular to the axis of revolution; and
a linear collimator being of plate form having in cross section one dimension substantially larger than in another direction perpendicular to it, the linear collimator having an entry surface for entry of the light beams of the toroidal lens and an exit surface for exit of the light beams in a direction of the optical axis of the light guide module, and having outer reflection surfaces being parallel with the plane perpendicular to the axis of revolution for total internal reflection of the light beams nearly parallel with the plane perpendicular to the axis of revolution, whereas the toroidal lens and the linear collimator form together a single part.

4. A light guide module, consisting essentially of:
a single light source having a light-emitting part for emission of a light beam;
a single toroidal lens detached and spaced from the light source having a form created by rotation of a profile of a convex lens about an axis of revolution, the axis of revolution passing through the optical center of the light source and being perpendicular to an optical axis of the light guide module, the toroidal lens having a concave entry surface for entry of the light beams of the light source and a convex exit surface for exit of the light beams in a direction parallel or nearly parallel with a plane perpendicular to the axis of revolution; and
a linear collimator being of plate form having in cross section one dimension substantially larger than in another direction perpendicular to it, the linear collimator having an entry surface for entry of the light beams of the toroidal lens and an exit surface for exit of the light beams in a direction of the optical axis of the light guide module, and having outer reflection surfaces being parallel with the plane perpendicular to the axis of revolution for total internal reflection of the light beams nearly parallel with the plane perpendicular to the axis of revolution, whereas light scattering elements are arranged on the exit surface of the linear collimator or an additional optical plate disposed adjacent the exit surface of the linear collimator.

5. A light guide module, comprising
a single light source having a light-emitting part for emission of a light beam;
a single toroidal lens detached and spaced from the light source having a concave entry surface for entry of the light beam of the light source and a single, continuous convex toroidal exit surface for exit of a light beam directed by the toroidal lens nearly parallel with a horizontal plane; and
a linear collimator having an entry surface for entry of the light beam of the toroidal lens and an exit surface for exit of the light beam nearly parallel with the horizontal plane, the linear collimator being of plate form and having outer reflection surfaces for total internal reflection of the light beam nearly parallel with the horizontal plane, the single lens being the only lens.

Assignees

• Sousek Pavel
• Martoch Jan
• Dejmek Wilfred
• Varroc Lighting Systems Sro

Inventors

• Sousek Pavel
• Martoch Jan
• Dejmek Wilfred

Classifications

• F21S48/2243

  Mechanical Engineering · mapped topic

• F21S48/215 Primary

  Mechanical Engineering · mapped topic

• F21S48/2262

  Mechanical Engineering · mapped topic

• F21S48/2281

  Mechanical Engineering · mapped topic

• F21S43/14 Primary

  Light emitting diodes [LED] · CPC title