Integrated LiDAR Optics to Reduce Receiver Path Blockage
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Solution Overview
Problem
Conventional LiDAR sensors face reduced light receiving efficiency due to a blockage area caused by the transmission barrel and reflector, leading to increased component count and decreased detection distance.
Innovation Solution
Integration of the receiving and transmitting optical systems into a single optical module, with the sensing light source unit positioned to avoid blocking the light receiving path, and the use of integrated light transmitting and receiving lenses to minimize blockage and reduce component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the transmission barrel and transmission reflector are installed to turn the optical path, then the size of the LiDAR sensor is reduced, but the blockage area increases and light receiving efficiency decreases
Solution Approach 1:
The patent combines the transmission optical system and reception optical system into a single integrated optical module. The transmission barrel and reception lens are merged into one structure, and the transmission reflector and reception reflector are integrated, eliminating the blockage area caused by separate components while maintaining the optical path turning function.
Solution Approach 2:
The integrated optical module performs multiple functions: it transmits sensing light via the light source and transmission reflector, receives incident light through the reception lens, and redirects both light paths using the same optical structure. This multi-functionality eliminates the need for separate transmission and reception components.
2Volume of moving object
If the transmission barrel and transmission reflector are installed to turn the optical path, then the size of the LiDAR sensor is reduced, but the number of components increases
Solution Approach 1:
The patent merges the transmission optical system components (transmission barrel, transmission reflector) and reception optical system components (reception lens, reception reflector) into a single integrated optical module, reducing the total number of components while maintaining all necessary functions.
Solution Approach 2:
The integrated optical module serves multiple purposes: housing the light source, transmitting sensing light, receiving incident light, and redirecting both light paths. This single multi-functional component replaces what would traditionally require multiple separate components.
3Device complexity
If the sensing light source unit is positioned in the conventional location, then the structure is simple, but the blockage area increases and maximum detection distance decreases
Solution Approach 1:
The light source is repositioned from a conventional axial location to an off-axis position, utilizing a different spatial dimension. This dimensional change allows the light source to be positioned without blocking the reception optical path, thereby eliminating the blockage area while maintaining structural simplicity through the integrated module design.
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 configuration enhances light receiving efficiency, reduces the number of components, and increases the maximum detection distance of the LiDAR sensing device.
Implementation Method 1
a light transmitting reflector configured to reflect the sensing light radiated from the sensing light source unit
Implementation Method 2
a scanner unit configured to reflect the sensing light reflected from the light transmitting reflector into a target, and to reflect incident light reflected from the target
Implementation Method 3
a light receiving lens configured to pass the incident light reflected from the scanner unit
Implementation Method 4
a light receiving reflector configured to reflect the incident light passing through the light receiving lens
Data Source
AI summary
A LiDAR sensing device including: a sensing light source unit configured to radiate sensing light; a light transmitting reflector configured to reflect the sensing light radiated from the sensing light source unit; a scanner unit configured to reflect the sensing light reflected from the light transmitting reflector into a target, and to reflect incident light reflected from the target; a light receiving lens configured to pass the incident light reflected from the scanner unit, and integrated with the light transmitting reflector; a light receiving reflector configured to reflect the incident light passing through the light receiving lens; and an optical detecting unit into which the incident light reflected from the light receiving reflector is incident.