Optical module for automotive vehicle

摘要

#CMT# #/CMT# The module has a light source (S) placed at an inner focus (Fi) of an ellipsoidal main reflector (1). A convex lens (2) has a primary focal point located near another focus (Fe) of the reflector. A quadric additional reflector (4) with curved surface has a focus merged with the inner focus and parameters different from that of the reflector (1). The reflector (4) is inserted and fixed in the reflector (1) by a leg assembly. The reflector (4) has reduced thickness in its rear zone such that its inner surface is connected tangential to an inner surface of the reflector (1). #CMT# : #/CMT# An independent claim is also included for a motor vehicle lighting device. #CMT#USE : #/CMT# Used for a lighting device e.g. headlamp such as main beam headlamp and dipped beam headlamp, of a motor vehicle (claimed), for producing a light beam with a cut off in an upper region of the beam. #CMT#ADVANTAGE : #/CMT# The insertion of the additional reflector in the main reflector permits to modify the characteristics such as to thicken, thin down, widen, shrink or render depth, of the light beams of the optical module in a simple and economical manner according to the requirements of various constructors or users, without increasing the dimensions such as depth, of the main reflector. The additional reflector has reduced thickness in its rear zone such that its inner surface is connected tangential to the inner surface of the main reflector, thus limiting the break-up of the connection of the rear part of the additional reflector with the inner surface of the main reflector. The module and the projector can be easily modulable without requiring large investments and permit to observe a vast photometrical selection while conserving a standard elliptical part. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a vertical section of an optical module. Fe : Ellipsoidal main reflector`s focus Fi : Inner focus S : Light source 1 : Ellipsoidal main reflector 2 : Convex lens 4 : Quadric additional reflector #CMT#METALLURGY : #/CMT# The inner surface of the additional reflector is formed of molded aluminum.