Laser Light Source Device Non-Polarized Beam Generation
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Solution Overview
Problem
Laser projection systems suffer from reduced image quality due to polarized beams emitted by laser diodes, which need to be addressed by appropriately disposing polarization in the laser light source device.
Innovation Solution
The laser light source device incorporates a laser diode array with collimation lenses and strategically positioned V-shaped and U-shaped notches on the diodes, along with a reflector module, to create a non-polarized beam by adjusting the orientation angles of the diodes and using reflectors to enhance light energy density, effectively forming a combined beam with an angle of polarization approximating 360 degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If laser diodes are used as light source, then high energy and collimated beam are achieved, but polarized beam reduces image quality
Solution Approach 1:
The patent divides the laser diode array into multiple groups with different orientation angles (e.g., 0°, 45°, 90°, 135°), where each group emits polarized beams at different angles. By segmenting the light source into multiple polarization orientations, the system achieves a combined non-polarized beam that maintains high energy while eliminating image quality degradation.
Solution Approach 2:
The patent combines multiple polarized beams from laser diodes with different orientation angles into a single non-polarized beam. The collimation lens array and reflector module merge these separate polarized beams, maintaining their high energy characteristics while canceling out the harmful polarization effect through angular diversity.
2Object-affected harmful factors
If multiple laser diodes with different orientations are used to create non-polarized beam, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent designs a universal laser diode array structure where each diode follows the same configuration pattern but with varied orientation angles. This multi-functional approach allows the same structural design to serve multiple polarization orientations, simplifying manufacturing while achieving non-polarized beam output.
Solution Approach 2:
The patent applies local quality variation by introducing V-shaped and U-shaped notches at specific locations on selected laser diodes to adjust their orientation angles. This localized modification approach allows precise control of polarization angles without redesigning the entire laser diode array, thereby managing device complexity.
3Object-affected harmful factors
If V-shaped and U-shaped notches are added to laser diodes to adjust orientation, then polarization control is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates V-shaped and U-shaped notches during the laser diode fabrication process itself, rather than adding them as separate post-processing steps. This preliminary action integrates the polarization control feature into the manufacturing process, making it easier to produce and ensuring consistent orientation angles across multiple diodes.
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 solution enhances image quality by converting polarized beams into non-polarized beams, increasing light energy density and improving the functionality of the laser light source device as a non-polarized light source, thereby addressing the image quality issues in laser projection systems.
Implementation Method 1
a first collimation lens array corresponding to the first laser diode light source array; Each collimation lens of the first collimation lens array corresponds to a different laser diode of the first laser diode light source array
Implementation Method 2
a reflector module; using reflectors to enhance light energy density
Data Source
AI summary
A laser light source device for a laser projection system effectively emitting non-polarized light comprises a laser diode light source array and a collimation lens array. The laser diode light source array comprises N number of laser diodes in a matrix and the collimation lens array comprises a plurality of collimation lenses. Each of the plurality of collimation lenses corresponds to one laser diode of the N number of laser diodes. An outer shell of each laser diode defines a position portion marking a certain orientation, and a gradual angle of polarization is defined and progresses through the N number of laser diodes by reference to the position portion. A predetermined angle difference is applied to each laser diode in the matrix to set the orientation of polarization and substantially achieve a non-polarized light source.