Projection Laser Source Beam Symmetry via Segmented Exit Regions
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Solution Overview
Problem
Current projection laser sources face challenges in achieving high symmetry and uniform mixing of laser beams of different colors, leading to poor display effects in projection images due to varying incident angles and differing homogenization effects on red, green, and blue laser beams.
Innovation Solution
The projection laser source incorporates a laser device with distinct exit regions emitting different colored laser beams, a light guide lens group, and combining lenses to adjust and mix these beams, ensuring high symmetry and uniformity by aligning and reflecting the beams to achieve optimal mixing and homogenization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If laser beams of different colors are emitted directly without adjustment, then the device structure is simple, but the symmetry and mixing effect of the laser beams are poor
Solution Approach 1:
The laser exit regions are divided into multiple sub-regions (first sub-region, second sub-region, third sub-region) corresponding to different colors. Each sub-region is independently adjusted by the light guide lens group to control the incident angle and position of laser beams on the combining lens, thereby achieving symmetric mixing while maintaining reasonable structural complexity
Solution Approach 2:
The light guide lens group acts as an intermediary component between the laser exit regions and the combining lens. It adjusts the incident angles and positions of laser beams from different sub-regions, enabling symmetric distribution on the combining lens without requiring direct complex arrangement of laser sources
2Stability of the object's composition
If different incident angles are used for different colored laser beams, then the device structure is simple, but the homogenization effect is poor
Solution Approach 1:
Different sub-regions of the laser exit are assigned different local optical paths. The light guide lens group provides localized adjustment for each sub-region, controlling the incident angle and position of laser beams from specific areas to achieve uniform mixing across the entire beam while allowing local variations in the optical path
3Stability of the object's composition
If the laser exit regions are arranged without specific positioning, then the device structure is simple, but the symmetry of mixed beams is poor
Solution Approach 1:
The light guide lens group performs preliminary adjustment of the laser beams before they reach the combining lens. By pre-controlling the incident angles and positions of beams from different sub-regions, the system ensures symmetric distribution on the combining lens, reducing the need for high precision in the final assembly positioning
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 improved symmetry and uniformity of the mixed laser beams, enhancing the display effect of projection images by reducing differences in incident angles and improving light mixing uniformity.
Implementation Method 1
The light guide lens group is configured to adjust a laser beam emitted by the first sub-region and a laser beam emitted by the second sub-region
Implementation Method 2
the first combining lens and the second combining lens are configured to emit the incident laser beam along the first direction
Data Source
AI summary
A projection laser source includes a laser device, a light guide lens group, a first combining lens, and a second combining lens. The light guide lens group is configured to adjust laser beams emitted by the first sub-region and the second sub-region to be emitted towards the first combining lens and the second combining lens, respectively, from a side of the third laser-exit region away from the second laser-exit region. A laser beam emitted by a region other than the first sub-region in the first laser-exit region is emitted to the first combining lens. A laser beam emitted by a region other than the second sub-region in the second laser-exit region and a laser beam emitted by the third laser-exit region are emitted to the second combining lens. The first combining lens and the second combining lens are configured to emit the incident laser beam along the first direction.