Dual Scanner Optical Device Beam Walk-Off Reduction
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Solution Overview
Problem
Lidar systems with single scanners face constraints such as size, tilting range, and scanning frequency limitations, and cascading two scanners in series requires one scanner to be larger to accommodate beam walk-off, increasing cost and space consumption.
Innovation Solution
Incorporating a lens system between two scanning components, where the first scanner scans the lens system and the second scanner scans the field of view, maintaining a small beam size and allowing both scanners to be of similar size, thus conserving space and cost by preventing the need for a larger second scanner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two scanners are cascaded in series with one scanner scanning the other, then the field of view can be scanned, but the second scanner must be larger to accommodate beam walk-off, increasing cost and space consumption
Solution Approach 1:
A lens system is introduced as an intermediary component between the first scanner and the second scanner. The lens system receives the optical beam from the first scanner and redirects it to the second scanner, enabling the second scanner to remain compact while still achieving the required field of view scanning capability.
Solution Approach 2:
The lens system changes the spatial dimension of beam propagation by redirecting the optical path. Instead of requiring the second scanner to be larger to accommodate direct beam walk-off, the lens system introduces a new optical path dimension that allows compact scanner design while maintaining scanning capability.
2Measurement precision
If the second scanner is made larger to accommodate beam walk-off, then beam scanning accuracy is improved, but cost and space consumption increase
Solution Approach 1:
The lens system acts as a mediator that maintains beam scanning accuracy without requiring a larger second scanner. By introducing the lens system, the optical path is optimized to preserve beam precision while keeping the scanner size and overall system complexity manageable.
Solution Approach 2:
The lens system changes the optical parameters of the beam path, including the angle and position of beam propagation. This parameter transformation allows the second scanner to operate with high precision while maintaining a compact size, thereby reducing system cost and space requirements.
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 maintains a small beam size, conserves resources, and allows for higher resolution without increasing the size of the optical system, enabling a wider field of view while reducing costs and space consumption.
Implementation Method 1
a first lens; a first scanning component to receive an optical beam having a first beam size and to scan the first lens with the optical beam, wherein the first lens is to increase a beam size of the optical beam to a second beam size
Implementation Method 2
a second lens to receive the optical beam having the second beam size; and a second scanning component to receive, from the second lens, the optical beam having the second beam size
Data Source
AI summary
An optical device may include a lens system. The optical device may include a first scanning component to receive an optical beam and to scan the lens system with the optical beam. The optical device may include a second scanning component to receive the optical beam from the lens system and to scan a field of view with the optical beam, where the lens system is positioned between the first scanning component and the second scanning component. The lens system may include a beam expander.