Patent ID: 9574734
Date: 2017-02-21
CPC Classifications: F21S

Claim:
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.