Abstract: A light guiding optical system comprising a light guide at least partially formed of an optically transparent material and a light source situated on an input surface of the light guide. The light guide comprises on its front side an output surface for the output of light rays conducted through and out of the light guide, and on its rear side a tooth-like structure to unbind light rays through the output surface out of the light guide. The light guiding optical system further comprises a reflector at least partially formed of an optically transparent material, positioned near the tooth-like structure, and comprising at least two reflective surfaces configured to totally reflect light rays that have escaped from the light guide through the tooth-like structure and to return them to the light guide.

Abstract: A light guiding optical system comprising a light guide at least partially formed of an optically transparent material and a light source situated on an input surface of the light guide. The light guide comprises on its front side an output surface for the output of light rays conducted through and out of the light guide, and on its rear side a tooth-like structure to unbind light rays through the output surface out of the light guide. The light guiding optical system further comprises a reflector at least partially formed of an optically transparent material, positioned near the tooth-like structure, and comprising at least two reflective surfaces configured to totally reflect light rays that have escaped from the light guide through the tooth-like structure and to return them to the light guide.

Abstract: A lighting device for a motor vehicle includes a light source for sending out a light beam. The lighting device also includes a lightguide of elongated shape made of a plastic, primarily transparent material for guiding the light beam, while a portion of a mantle of the lightguide forms an exit surface for emergence of rays of light of the light beam, wherein another portion of the mantle of the lightguide opposite the exit surface is at least partly provided with a diffuse means formed by a nontransparent coating or foil pressed against the mantle of the lightguide, or joined to a diffuse means of the plastic primarily nontransparent material in the process of injection molding of the plastic.

Abstract: A lighting device for a motor vehicle includes a light source for sending out a light beam. The lighting device also includes a lightguide of shape made of a plastic, primarily transparent material for guiding the light beam, while a portion of a mantle of the lightguide forms an exit surface for emergence of rays of light of the light beam, wherein another portion of the mantle of the lightguide opposite the exit surface is at least partly provided with a diffuse means formed by a nontransparent coating or foil pressed against the mantle of the lightguide, or joined to a diffuse means of the plastic primarily nontransparent material in the process of injection molding of the plastic.