Vehicle Headlight Illumination Device with Segmented Optics
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Solution Overview
Problem
In illumination devices for motor vehicle headlights, undesired light refraction often occurs at the boundary face of the light-guiding body, particularly when it has a large spatial extent, leading to suboptimal light emission.
Innovation Solution
The use of a secondary optic element with a plurality of optical facets arranged in a planar manner on its input face to refract light beams, ensuring they are oriented in the main emission direction after exiting, thereby compensating for refraction at the output face, and incorporating light-scattering means on the primary optic element to maintain constant illumination intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the light-guiding body has a large spatial extent in the light propagation direction, then the light can be guided over a longer distance, but undesired light refraction occurs at the boundary face
Solution Approach 1:
The optical system is divided into two separate elements: a primary optic element and a secondary optic element spaced apart from each other. This segmentation allows the primary element to handle light guidance while the secondary element corrects refraction at its input face, resolving the contradiction between long light guidance distance and refraction control.
Solution Approach 2:
The secondary optic element acts as an intermediary between the light source and the final emission point. It corrects the refraction introduced by the primary optic element's boundary face, enabling the system to maintain both long spatial extent and proper light orientation.
2Ease of operation
If the secondary light input face is curved to guide light, then light propagation is controlled, but refraction losses increase
Solution Approach 1:
Different regions of the optical system have different functions: the primary optic element's boundary face is curved to enable light guidance, while the secondary optic element's input face is designed with specific curvature to compensate for refraction. This local differentiation of optical properties minimizes overall refraction losses while maintaining propagation control.
3Object-generated harmful factors
If the primary optic element and secondary optic element are spaced apart, then refraction at the boundary can be reduced, but the device complexity increases
Solution Approach 1:
The optical system is divided into two separate elements: a primary optic element and a secondary optic element spaced apart from each other. This segmentation allows the primary element to handle light guidance while the secondary element corrects refraction at its input face, resolving the contradiction between long light guidance distance and refraction control.
Solution Approach 2:
The secondary optic element acts as an intermediary between the light source and the final emission point. It corrects the refraction introduced by the primary optic element's boundary face, enabling the system to maintain both long spatial extent and proper light orientation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves light emission by minimizing refraction losses and maintaining uniform intensity across the secondary light output face, enhancing the overall performance of the illumination device.
Implementation Method 1
the optical elements on the secondary light input face cannot be damaged by possible contact with the primary light output face... configured to refract the light beams as they enter the secondary optic element
Implementation Method 2
The primary light output face can have light-scattering means in order to scatter the light input by the lighting means around the main emission direction as it exits the primary light output face
Data Source
AI summary
The invention relates to an illumination device (1) for a motor vehicle headlight, comprising:a lighting means (2);a primary optic element (3), which has a primary light input face (3a) for receiving light emitted by the lighting means (2), the light being guided to a primary light output face (3b) and emitted in a main emission direction (4);a secondary optic element (5), which has a secondary light input face (5a), the light from the lighting means (2) being emitted from the primary light output face (3b) via the secondary light input face (5a) into the secondary optic element (5) and being guided inside the secondary optic element (5) to a secondary light output face (5b), wherein the secondary light input face (5a) is formed by a plurality of optical elements (6) which are arranged next to one another in a planar manner and are designed to refract the light beams as they enter the secondary optic element (5) such that the light beams are oriented in the direction of the main emission direction (4) after they are refracted on exiting the secondary light output face (5b).