Two-Axis Optical Element Drive for Compact Ranging Systems
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Solution Overview
Problem
Existing ranging systems are limited to single-axis driving, which prevents movement of optical elements in the Y axis direction, leading to an increase in the distance between the light emitting and receiving devices, thereby compromising the system's efficiency.
Innovation Solution
An optical element drive device employing a two-axis driving mechanism, utilizing a magnetic field generation member and coil configuration that allows the optical element to move in both the X and Y axes directions, while minimizing the distance between the optical element and the light receiving device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If single-axis driving is employed to avoid increasing the distance between light emitting and receiving devices, then the distance is kept short, but the optical element cannot move in the Y axis direction
Solution Approach 1:
The patent transitions from single-axis driving (X-axis only) to two-axis driving by adding Y-axis movement capability. The optical element is enabled to move in both X and Y directions through a combined driving mechanism, allowing the system to irradiate ranging points in a two-dimensional area while maintaining a short baseline length between light emitting and receiving devices.
2Adaptability or versatility
If two-axis driving is implemented to enable movement in both X and Y axes directions, then the optical element can cover more ranging points, but the distance between light emitting and receiving devices increases
Solution Approach 1:
The patent combines X-axis and Y-axis driving mechanisms into an integrated two-axis driving system. The optical element is simultaneously driven in both X and Y directions by a unified driving structure, enabling two-dimensional movement while keeping the baseline length short. This merging of driving axes allows the optical element to reach multiple ranging points without increasing the distance between light emitting and receiving devices.
3Manufacturing precision
If the drive unit is positioned closer to the optical element, then the movement control is more precise, but the outer portion cannot be disposed adjacent to the light receiving device
Solution Approach 1:
The patent extracts the drive unit from the outer portion and positions it at a separate location further away from the outer portion. The drive unit is disposed at a position that does not interfere with the adjacency of the outer portion to the light receiving device, while still maintaining precise movement control of the optical element through the separated driving mechanism.
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 two-axis driving mechanism effectively suppresses the increase in distance between the optical element and the light receiving device, enhancing the system's efficiency and flexibility.
Implementation Method 1
a drive unit including at least a magnetic field generation member (5) and a coil (9), the magnetic field generation member and the coil being configured to move the optical element holding member (2) in the direction perpendicular to the vertical direction
Data Source
AI summary
An optical element drive device for a ranging system that can be disposed adjacent to a light receiving device includes a drive unit including a magnetic field generation member and a coil. A fixing member includes an outer portion that is disposed adjacent to the light receiving device. The drive unit is disposed at a position further away from the outer portion than a portion, of the penetration, where the optical element is disposed. A first coil includes a first extension and a second extension extending along a first extension direction, and a second coil includes a third extension and a fourth extension extending along a second extension direction. The first extension direction and the second extension direction are substantially orthogonal to each other in plan view along the vertical direction.