Patent ID: 11965632
Assignee: ZKW GROUP GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An illumination device (10) for a motor vehicle headlight, the illumination device (10) comprising:
at least one first light module (100) having at least one light source to produce light distribution in a direction of a main emission direction, wherein the first light module (100) is designed to emit light beams in a main emission direction;
a projection lens (300) with an optical axis (A), which projection lens (300) is designed to image a light that can be produced by the first light module (100) in front of the illumination device (10), wherein the projection lens (300) is designed as a Fresnel lens, which Fresnel lens has a base body (310) and several annular steps (320) arranged on the base body (310), which steps (320) are arranged substantially concentrically to one another, wherein each step (320) has a main surface (320a) to project the light beams of the at least one first light module (100) in front of the illumination device (10) and a sloping surface (320b) extending from the base body (310) to the main surface (320a); and
a bulb shield (400), wherein the bulb shield (400) comprises an optically relevant shield edge (410) for producing a cut-off line, wherein the optically relevant shield edge (410) intersects the optical axis (A) of the Fresnel lens, and wherein the first light module (100) is arranged on an upper side of the bulb shield and cooperates in combination with the optically relevant shield edge (410) of the bulb shield (400) to produce light distribution,
wherein the main surface (320a) of each step (320) is curved and has at least one focal point (F1, F2, F3, F4), which focal point (F1, F2, F3, F4) is arranged at least one of horizontally displaced from the optical axis (A) of the Fresnel lens or vertically displaced from the optical axis (A) of the Fresnel lens, and
wherein adjacent steps (320) have different focal points (F1, F2, F3, F4) from one another.