Multi-Emitter Radiation Projection for High-Resolution Beam Scanning
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Solution Overview
Problem
Existing projectors and LIDAR systems face challenges in achieving high image resolution and fast image sequences with complex optics and mechanical devices, leading to high stress on laser diodes and inefficient energy use.
Innovation Solution
A device with a radiation source comprising multiple individually controllable emitters, such as laser diodes, and optical elements like microlenses, micro-opto-electro-mechanical systems, and rotating mirrors, allows for high-resolution image projection and obstacle detection with reduced mechanical complexity and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If complex optics and mechanical devices are used for beam shaping and beam directing, then high image resolution and fast image sequence can be achieved, but device complexity increases
Solution Approach 1:
The invention divides the radiation source into multiple individually controllable emitters (e.g., multiple laser diodes) instead of using a single complex optical system. Each emitter can be independently controlled to project radiation points, eliminating the need for complex beam combining optics and mechanical scanning devices while achieving high image resolution through parallel operation of multiple emitters.
2Productivity
If laser diodes are used for projection with fast modulation, then high image sequence speed can be achieved, but the laser diodes are exposed to high stress
Solution Approach 1:
The invention uses multiple laser diodes operating in parallel instead of a single laser diode. This distributes the modulation stress across multiple components, reducing the stress on each individual laser diode while maintaining high image sequence speed through simultaneous operation of all emitters.
3Illumination intensity
If three focused and collimated laser beams are used for flying spot method, then high intensity light object can be generated, but device complexity and cost increase
Solution Approach 1:
The invention merges multiple radiation sources into a single radiation source assembly where each emitter contributes to the overall radiation output. By using multiple emitters that can be independently controlled and timed, the system achieves high light object intensity through cumulative radiation from multiple sources without requiring complex beam combining optics or mechanical devices.
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 enables high-resolution image projection and obstacle detection with reduced mechanical complexity, lower wear, and improved energy efficiency, allowing for compact and easy-to-handle projectors and LIDAR systems.
Implementation Method 1
at least one optical element is arranged in the radiation path for shaping, directing and/or converting the electromagnetic radiation
Data Source
AI summary
The invention relates to a device and a method for projecting a plurality of radiation points onto an object surface, comprising at least one radiation source for emitting electromagnetic radiation, comprising at least one beam path, via which the radiation emitted at least temporarily by the emitters is deflected in the direction of the object surface, and comprising a controller which, in order to change at least one property of the emitted radiation, controls the radiation source according to a light object to be generated on the object surface. The controller is designed in such a way that at least two of the plurality of emitters of the radiation source are each individually controlled in order to change at least one property of the emitted radiation according to the light object to be generated, and at least one optical element for shaping, directing and/or converting the electromagnetic radiation is arranged in the beam path.