Coaxial Visible-Infrared Laser Output for Low-Cost LiDAR Alignment
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Solution Overview
Problem
The high cost of invisible light cameras used for adjusting laser radar systems, which are necessary for ensuring precise optical path settings, hinders cost-effective production and operation in industries and national defense applications.
Innovation Solution
A method and device that enable coaxial output of visible and invisible light, allowing for the adjustment of laser radar systems using visible light, which can be monitored with a common, cheaper camera, by setting and fine-tuning distances to minimize the spot area on a target surface, thereby reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If invisible light cameras are used for adjusting laser radar, then measurement precision is improved, but device cost increases
Solution Approach 1:
The patent introduces a visible light guide (scattered light source) as an intermediary substance to convert invisible infrared light into visible light. This mediator allows the invisible light path to be observed and adjusted using conventional visible light cameras, eliminating the need for expensive invisible light cameras while maintaining adjustment precision
Solution Approach 2:
The patent creates a visible light copy of the invisible light path by using a light guide that converts infrared light into visible scattered light. This optical copy enables observation and measurement of the invisible light path using standard visible light detection equipment, reducing device cost while preserving measurement accuracy
2Manufacturing precision
If invisible light cameras are used for adjusting laser radar, then optical path adjustment precision is improved, but production cost increases
Solution Approach 1:
The patent replaces expensive invisible light cameras with inexpensive visible light cameras and a simple visible light guide system. This substitution uses low-cost components to achieve the same adjustment function, significantly reducing production costs while maintaining manufacturing precision
Solution Approach 2:
The visible light guide acts as a mediator that enables standard visible light cameras to observe the invisible light path. This intermediary approach allows the use of cheap, widely available equipment instead of specialized expensive equipment, reducing manufacturing costs while preserving precision
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 approach facilitates cost-effective adjustment of laser radar systems by utilizing visible light output to adjust invisible light paths, enabling precise optical path settings without the need for expensive invisible light cameras, thus reducing production costs and improving operational efficiency.
Implementation Method 1
a first wavelength division multiplexing module and N amplification modules, N being a positive integer; wherein the seed source is configured to output pulsed laser to the amplification modules
Implementation Method 2
making the laser device output the visible light according to the corrected second distance, and adjusting a first distance until the area of a spot of the visible light on the target surface reaches a minimum value
Data Source
AI summary
A laser device is capable of coaxially outputting visible light and invisible light. The laser device includes a seed source outputting the invisible light, a visible light source outputting the visible light, a first wavelength division multiplexing module and N amplification modules, N is a positive integer. The seed source outputs pulsed laser to the amplification modules. The amplification modules perform power amplification on a signal passing therethrough to obtain a signal with power amplified. The first wavelength division multiplexing module performs wavelength division multiplexing processing on the visible light and the invisible light to ensure that an output end of the laser device is capable of coaxially outputting the visible light and the invisible light.