Vehicle Headlamp Collimator Alignment for Parallax Reduction
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Solution Overview
Problem
Current vehicle headlight systems face challenges in projecting a high-resolution, homogeneous light image onto the road due to parallax errors and overlapping or gaps between partial light images, which affect brightness and intensity uniformity.
Innovation Solution
The arrangement of collimators and projection optics with specific focal lengths and image surfaces, along with collecting optics, ensures that partial light images are aligned and combined without gaps or overlaps, reducing parallax errors and enhancing overall light image intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light sources with individual optics are arranged to generate partial light patterns, then the overall light pattern can be composed with controlled intensity distribution, but parallax errors occur causing gaps or overlaps between adjacent partial light patterns at different distances
Solution Approach 1:
The headlight system divides the overall light pattern into multiple partial light patterns generated by separate light sources and optics assemblies. Each assembly independently projects a portion of the total light pattern, allowing individual optimization and modular arrangement to achieve the desired overall illumination distribution while managing alignment challenges through systematic design
Solution Approach 2:
A compensating optical element is introduced as an intermediary component between the light sources/optics and the road surface. This element actively corrects parallax errors by adjusting the projection geometry, ensuring that partial light patterns align seamlessly without gaps or overlaps at various distances, thereby maintaining manufacturing precision in the final light pattern assembly
2Illumination intensity
If complex optical arrangements are used to achieve parallel emission patterns from light sources, then the overall light pattern can be optimized, but the device complexity increases
Solution Approach 1:
The optical system is segmented into multiple independent light source and optics assemblies, each capable of generating parallel emission patterns individually. This modular approach allows the complex function of parallel emission to be distributed across simpler, identical units rather than requiring a single complex optical arrangement, thereby managing device complexity through standardization and modularity
Solution Approach 2:
Multiple identical light source and optics assemblies are used, where each assembly performs the same function of generating a partial parallel emission pattern. This universal design allows the system to achieve the overall parallel emission effect through the combined action of multiple simple, identical units, reducing the complexity of individual components while maintaining the desired overall performance
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 results in a more uniform and intense light distribution on the road, reducing parallax errors and improving the homogeneity of the light image, even at varying distances.
Implementation Method 1
at least two collimators (20, 21, 22, 23), each with an optical collimator axis (60, 61, 62, 63) and a collimator focal point (30, 31, 32, 33) located on the collimator axis (60, 61, 62, 63)
Implementation Method 2
a projection optic (1) with an optical projection axis (7) and a focal point (3) located on the projection axis (7)
Data Source
Figure 1~2
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AI summary
Vehicle headlight (500), comprising at least two light sources (10, 11, 12, 13) each with a light-emitting surface, at least two collimators (20, 21, 22, 23) each with an optical collimator axis (60, 61, 62, 63) and each with a collimator focal point (30, 31, 32, 33) located on the collimator axis (60, 61, 62, 63), and a projection optic (1) with an optical projection axis (7) and a focal point (3) located on the projection axis (7). The at least two light sources (10, 11, 12, 13) are located between a collimator image surface (45), which is perpendicular to the projection axis (7), and the projection optic (1). The at least two collimators (20, 21, 22, 23) are each located between the at least two light sources (10, 11, 12, 13) and the projection optics (1). The collimator focal points (30, 31, 32, 33) are each located between the collimator image surface (45) and the at least two light sources (10, 11, 12, 13).Each of the at least two light sources (10, 11, 12, 13) is arranged to emit light in the direction of the respective collimator axes (60, 61, 62, 63) through one of the at least two collimators (20, 21, 22, 23) and as a result the emitted light is guided together through the projection optics (1).