Light Emission Optics for Wide-Scan Precise Distance Sensing
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Solution Overview
Problem
Optical distance-measuring devices face challenges in accurately measuring distances due to light diffusion in multiple directions, which affects measurement precision and coverage area.
Innovation Solution
A light emitting device with multiple light emitting regions and an optical system that deflects light in different directions, where the light exit angle in one direction is smaller than in another direction, reducing diffusion and enhancing measurement precision and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If light is emitted in multiple directions to increase coverage area, then area coverage is improved, but measurement precision deteriorates due to light diffusion
Solution Approach 1:
The optical system is designed with direction-dependent light exit angles, where the light exit angle in the first direction (scanning direction) is larger than in the second direction (intersecting direction). This creates different optical characteristics for different spatial directions, allowing wide coverage in the scanning direction while maintaining precision in the intersecting direction by minimizing light diffusion there.
Solution Approach 2:
The patent employs asymmetric optical design where the light exit angles are intentionally made unequal in different directions. The optical system deflects light such that the exit angle in the first direction differs from that in the second direction, creating an asymmetric light distribution pattern that simultaneously achieves wide coverage and high measurement precision.
2Area of stationary object
If optical system deflects light in different directions to increase coverage, then coverage area is improved, but light diffusion increases affecting measurement accuracy
Solution Approach 1:
The optical system creates direction-specific light exit characteristics, with larger exit angles in the scanning direction for coverage and smaller exit angles in the intersecting direction to suppress light diffusion. This local differentiation of optical properties allows the system to achieve wide coverage while minimizing harmful light diffusion in specific directions.
Solution Approach 2:
By designing the optical system to produce asymmetric light deflection with different exit angles in different directions, the patent achieves wide coverage area through larger angles in the scanning direction while suppressing light diffusion (harmful effect) through smaller angles in the intersecting direction.
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 improves measurement precision and allows for wider area coverage by minimizing light diffusion in non-essential directions, leading to more accurate distance measurements and enhanced operational efficiency.
Implementation Method 1
an optical system that is disposed on a light-exit side of the light emitting part and that deflects light emitted from the multiple light emitting regions in different directions
Data Source
AI summary
A light emitting device includes: a light emitting part having multiple light emitting regions arranged along a first direction; and an optical system that is disposed on a light-exit side of the light emitting part and that deflects light emitted from the multiple light emitting regions in different directions, the optical system being configured such that a light exit angle in a second direction, which intersects the first direction, is smaller than the light exit angle in the first direction.