Lighting module comprising a laser element
AssigneeValeo Vision
InventorEric Mornet
Life of this patent
Estimating the term…
Abstract
A lighting module includes a semiconductor laser element configured for emitting a laser beam in an emission cone, a light-emitting element, and a reflecting surface, a main portion of which reflects light coming from the light-emitting element in order to form an outgoing light beam. A secondary guiding face reflects the light coming from the first emission cone into a measurement cone. Also included is a device for detecting incident light exceeding a predetermined threshold of light intensity which is arranged within the measurement cone. The optical structure of the guiding face causes a spreading of the light so that the measurement cone exhibits an aperture angle greater than that of the first emission cone.
Claims14
A lighting module for an automobile vehicle and designed to emit an outgoing light beam, the lighting module comprising:
- at least one semiconductor laser element configured for emitting a laser beam in a first light cone, referred to as emission cone;
- a light-emitting element configured for converting a wavelength of at least a part of said laser beam;
- a reflecting surface, a main portion of which reflects light coming from the light-emitting element in order to form said outgoing light beam oriented in a first direction of emission,
- a secondary guiding face which reflects the light coming from the emission cone into a second light cone, referred to as measurement cone, oriented in a second measurement direction;
- at least one device for detecting incident light exceeding a predetermined threshold of light intensity which is arranged within the measurement cone;
- wherein a geometrical profile of an envelope of the guiding face causes a spreading of the light so that the measurement cone exhibits an aperture angle greater than that of the emission cone, and
- wherein the light reflected by the guiding face does not form a part of the outgoing light beam.
The lighting module according to claim L wherein the guiding face comprises striations which cause the spreading of the light.
Dependencies are inferred from the claim text.