Wavelength-Based Spatial Multiplexing for Compact Illumination
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Solution Overview
Problem
Portable electronic devices face challenges in integrating multiple light sources for illumination within the constraints of volume and cost, particularly for applications like camera systems that require different wavelengths for 3D mapping and other functionalities.
Innovation Solution
A compact optoelectronic apparatus with an array of emitters generating optical radiation at two different wavelengths, projection optics, and a wavelength-based spatial multiplexer, including a dichroic beamsplitter and a controller, to selectively direct and control the emission of beams through different faces of the enclosure, enabling uniform or patterned illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate light sources are integrated into portable electronic devices, then illumination functionality for different wavelengths is improved, but device volume and complexity increase
Solution Approach 1:
The patent combines multiple light sources emitting at different wavelengths into a single integrated apparatus. The enclosure houses multiple emitters (first and second light sources) that generate optical radiation at different wavelengths, which are then directed through projection optics and a wavelength-based spatial multiplexer to exit through the same front face of the device, thereby reducing device volume while maintaining multi-wavelength illumination capability.
Solution Approach 2:
The integrated optoelectronic apparatus performs multiple illumination functions through a single device structure. By incorporating emitters at different wavelengths and using projection optics with a wavelength-based spatial multiplexer, the system can provide both 3D mapping illumination and general scene illumination through the same physical enclosure and exit aperture, achieving multi-functionality without increasing volume.
2Adaptability or versatility
If multiple separate light sources are integrated into portable electronic devices, then illumination functionality for different wavelengths is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple light sources and optical paths into a single integrated system. The enclosure contains both first and second emitters along with projection optics and a wavelength-based spatial multiplexer, combining what would traditionally be separate illumination systems into one unified apparatus, thereby reducing overall device complexity while maintaining multi-wavelength capability.
Solution Approach 2:
The wavelength-based spatial multiplexer acts as an intermediary component that separates and directs different wavelengths from multiple emitters through a unified optical path. This mediator enables the complex multi-wavelength illumination function to be achieved through a structured, manageable approach rather than requiring completely separate optical systems for each wavelength.
3Measurement precision
If wavelength-based spatial multiplexing is implemented, then optical radiation control precision is improved, but device complexity increases
Solution Approach 1:
The system controls optical radiation precision by changing the wavelength parameter as the distinguishing feature. The wavelength-based spatial multiplexer separates and directs different wavelengths (first and second wavelengths from different emitters) through different paths or to different destinations, enabling precise control over which wavelengths reach which optical paths without requiring complex mechanical adjustments or additional control mechanisms.
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 solution provides a compact, efficient means to generate and control optical radiation for various illumination needs, such as 3D mapping and flood lighting, by selectively directing beams of different wavelengths through the apparatus, enhancing the functionality of portable electronic devices.
Implementation Method 1
a dichroic beamsplitter configured to reflect the beams of the first wavelength toward the front face of the enclosure and to transmit the beams of the second wavelength
Implementation Method 2
a mirror positioned to intercept the beams of the second wavelength transmitted by the dichroic beamsplitter and to reflect the intercepted beams toward the rear face of the enclosure
Data Source
AI summary
An optoelectronic apparatus includes an enclosure including a front face and a rear face. An array of emitters is contained in the enclosure and configured to generate first beams of optical radiation at a first wavelength and second beams of radiation at a second wavelength different from the first wavelength. Projection optics contained in the enclosure have an entrance face and an exit face and are configured to receive the beams of optical radiation through the entrance face and to project the beams through the exit face. A wavelength-based spatial multiplexer is contained in the enclosure and positioned to intercept the projected beams and configured to direct the first beams through the front face and the second beams through the rear face. A controller is coupled to selectively drive the array so as to control relative proportions of the optical radiation that are emitted through the front and rear faces.