Seamless Planar Light Source via Full-Image Transfer and Stitching
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Solution Overview
Problem
Existing technologies face challenges in eliminating gaps between multiple planar light sources in the same plane, leading to non-uniform light intensity distribution, which is necessary to address for applications requiring more uniform light intensity.
Innovation Solution
A beam shaping method employing full-image transfer for planar light sources, involving the use of multiple first lenses to magnify and image beams from multiple light sources, followed by stitching the magnified images at a primary imaging position to create a seamless light source, and optionally using a second lens for further reduction and imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple planar light sources are arranged in the same plane to create large-sized light sources, then the light source size is increased, but gaps appear between the light sources causing non-uniform light intensity distribution
Solution Approach 1:
The system segments the light source into multiple planar light sources arranged in the same plane, each imaged separately by corresponding first lenses. This segmentation allows independent control and imaging of each light source element, enabling the magnified images to be stitched together to form a seamless large-sized light source that eliminates gaps while maintaining uniform light intensity distribution.
2Area of stationary object
If multiple planar light sources are used to stitch large-sized light sources, then the light source area is increased, but optical power is lost due to gaps between light sources
Solution Approach 1:
The system merges multiple magnified full images of planar light sources at the primary imaging position to create a seamless light source. By using multiple first lenses to respectively image each planar light source and then stitching these images together, the system combines the light output from multiple sources into a unified seamless light source, eliminating gaps and minimizing optical power loss while achieving the desired large light source area.
3Illumination intensity
If multiple first lenses are used to magnify and image beams from multiple planar light sources, then the light intensity uniformity is improved, but the device complexity increases
Solution Approach 1:
The first lenses in the lens group are designed with universal functionality, where each first lens performs the same magnification and imaging function for its corresponding planar light source. This multi-functionality allows the system to achieve uniform light intensity distribution across the entire light source array using identical optical components, simplifying the overall system design and reducing complexity despite the presence of multiple lenses.
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 method effectively eliminates gaps between light sources with minimal optical power loss, improving the overall beam quality and achieving uniform light intensity distribution.
Implementation Method 1
using multiple first lenses to respectively magnify and image beams emitted by multiple planar light sources
Implementation Method 2
using a second lens to reduce and image the beam of the seamless light source obtained in step (2)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A beam shaping method and device employing full-image transfer for planar light sources (11, 12, 13, 14). The method comprises: using multiple first lenses (21, 22, 23, 24) to respectively magnify and image beams emitted by multiple planar light sources (11, 12, 13, 14), so as to obtain magnified full images (31, 32, 33, 34) of the multiple planar light sources (11, 12, 13, 14); and seamlessly stitching together the magnified full images (31, 32, 33, 34) of the multiple planar light sources (11, 12, 13, 14) at a primary imaging position (30), so as to obtain a seamless light source (S) at the primary imaging position (30). The beam shaping method for the planar light sources (11, 12, 13, 14) achieves the elimination of gaps between the light sources with almost no loss of optical power by means of full-image transfer and seamless stitching, thereby improving the beam quality of the light sources as a whole. This kind of optical shaping method is suitable for shaping and processing planar light sources (11, 12, 13, 14) such as VCSEL and LED.