Optical Engine Carrier Structure for Multi-Light Source Isolation
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Solution Overview
Problem
Existing optical navigation devices face challenges in distinguishing working surfaces of different materials due to variations in reflectivity, leading to interference between multiple light sources and reduced identification accuracy.
Innovation Solution
An optical engine with a barrier structure that accommodates multiple light sources, preventing interference by directing emission and reflected light paths using tilted walls and lenses, and a carrier member that enhances light usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light sources are used to illuminate different working surfaces, then the adaptability to different materials is improved, but the interference between light sources increases
Solution Approach 1:
The patent divides the optical system into separate channels, each dedicated to a specific light source and its corresponding image sensor. Barrier structures segment the optical paths to prevent cross-interference between different light sources while maintaining the ability to illuminate different working surface materials.
Solution Approach 2:
The patent introduces barrier structures and optical filters as intermediary elements between light sources and image sensors. These intermediaries selectively block or transmit specific wavelengths, preventing interference from other light sources while allowing the desired light to reach the sensor.
2Measurement precision
If multiple light sources are used to improve material distinction, then the identification accuracy is improved, but the light source interference reduces measurement precision
Solution Approach 1:
The patent applies different optical properties to different parts of the system. Each light source channel has its own optimized optical path, barrier structure, and filter configuration tailored to that specific wavelength, ensuring maximum signal quality while minimizing cross-interference.
Solution Approach 2:
The patent uses optical filters and barrier structures that are selective to specific wavelengths (colors) of light. Each light source operates at a distinct wavelength, and the corresponding image sensor channel is optimized to detect only that wavelength, preventing signal mixing and maintaining measurement precision.
3Measurement precision
If barrier structures are added to prevent light interference, then the identification accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent integrates multiple functions into unified components. The barrier structures serve both as mechanical support and as optical filters simultaneously. The carrier member combines light source mounting, optical path definition, and structural support functions, reducing the number of separate components needed.
Solution Approach 2:
The patent designs the barrier structures and optical components to serve multiple purposes. The same barrier structure that blocks stray light also defines the optical path and provides mechanical support. The lens system performs both focusing and wavelength selection functions, reducing overall system complexity.
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
Improves identification accuracy by eliminating interference between light sources, allowing the optical engine to operate effectively on different working surfaces with enhanced light efficiency.
Implementation Method 1
uses an image sensor to capture reflected light from the working surface
Implementation Method 2
directing emission and reflected light paths using tilted walls and lenses
Implementation Method 3
The optical carrier structure includes a lens contain space
Data Source
AI summary
There is provided an optical engine for a navigation device including a first light source, a second light source, a lens, a carrier member and an image sensor. The carrier member has a light holder, a lens holder, an accommodation space and a tilted wall. The first light source is arranged on the light holder of the carrier member, and reflected light associated with the first light source penetrates through the lens to propagate to the image sensor inside the accommodation space. Reflected light associated with the second light source penetrates through the tilted wall of the carrier member to propagate to the image sensor.