Asymmetric Laser Illumination Beam Correction for Color Uniformity
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Solution Overview
Problem
Conventional solid-state light sources with asymmetrical laser chips exhibit inconsistent beam sizes and incident angles due to the asymmetrical aspect ratio, leading to poor color uniformity in illumination devices.
Innovation Solution
An illumination device incorporating an asymmetric laser light source, a beam adjustment module, and an anisotropic diffusion module to adjust and calibrate beam sizes and angles, ensuring consistent beam sizes and angles in different directions for uniform color illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an asymmetrical laser chip is used to generate collimated laser light, then the laser light can be produced efficiently, but the beam sizes in different directions become inconsistent leading to poor color uniformity
Solution Approach 1:
The patent applies asymmetry by using an anisotropic diffusion module with different optical properties in different directions. This module is specifically designed to compensate for the asymmetrical beam sizes produced by the laser chip, creating a symmetrical output beam that ensures consistent color uniformity while maintaining the efficiency benefits of the asymmetrical laser chip configuration
2Area of moving object
If the laser light passes through a beam expansion module, then the beam size is increased, but the beam sizes in two different directions remain inconsistent
Solution Approach 1:
The anisotropic diffusion module implements local quality by having different optical properties in different directions. This allows the module to selectively expand or diffuse the laser beam in specific directions to achieve uniform beam sizes, addressing the directional inconsistency while maintaining overall beam expansion
3Ease of operation
If the laser light is guided into the light guide, then the light is directed to the target, but the incident angles in different directions are different causing poor color uniformity
Solution Approach 1:
The anisotropic diffusion module performs preliminary action by pre-correcting the beam parameters (size and angle) before the light enters the light guide. This ensures that when the light is guided into the light guide, the incident angles are already standardized, preventing color uniformity issues downstream
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
The device achieves uniform color illumination by utilizing the anisotropic diffusion module to correct beam sizes and angles, enhancing color uniformity in projection and other optical apparatus.
Implementation Method 1
The anisotropic diffusion module has different optical properties in the first direction and the second direction, and the beam size of the illumination light beam is consistent in the first direction and the second direction
Data Source
AI summary
An illumination device includes an asymmetric laser light source, a beam adjustment module and an anisotropic diffusion module. The asymmetric laser light source is adapted to output an illumination light beam having different sizes in a first direction and a second direction that are interlaced with each other. The beam adjustment module is adapted to adjust a beam size of the illumination light beam. The anisotropic diffusion module is disposed between the asymmetric laser light source and the beam adjustment module. The anisotropic diffusion module has different optical properties along the first direction and the second direction, and the beam size of the illumination light beam is consistent in the first direction and the second direction.