Laser Tracking Device Segmented Optical Axis Control
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Solution Overview
Problem
Laser tracking devices face challenges in quickly and precisely modifying the optical axis direction of large aperture telescopes to track moving bodies in space with high precision, as they require controlling the optical axis direction over a wide range with high precision.
Innovation Solution
A laser tracking device is designed with a combination of an adjustment device and a drive device, where the adjustment device modifies the emission direction of the first light wave with higher precision than the drive device, allowing the telescope to rotate based on a predicted path of the moving body, and the adjustment device offsets the emission direction modification caused by the telescope's rotation from the tracking start condition until the moving body is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large aperture telescope is used to observe moving bodies with high precision, then measurement precision is improved, but the ability to quickly modify the optical axis direction deteriorates
Solution Approach 1:
The optical axis direction control is segmented into two independent systems: a drive device for coarse adjustment over a wide range, and an adjustment device for fine adjustment with high precision. This segmentation allows each subsystem to be optimized independently, resolving the contradiction between fast response and high precision.
2Adaptability or versatility
If the optical axis direction is controlled over a wide range, then adaptability is improved, but measurement precision deteriorates
Solution Approach 1:
The control range is segmented between two devices: the drive device provides wide-range coarse adjustment for adaptability, while the adjustment device provides small-range fine adjustment for precision. This segmentation enables the system to achieve both wide adaptability and high measurement precision simultaneously.
Solution Approach 2:
The system adds another dimension of control by introducing a secondary adjustment mechanism that operates independently of the primary drive device. This dimensional addition allows the system to achieve precision adjustments without compromising the wide range capability provided by the drive device.
3Productivity
If the telescope optical axis is quickly redirected to track moving bodies, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The tracking process is segmented into two phases: fast coarse tracking by the drive device for productivity, and slow fine tracking by the adjustment device for precision. This segmentation allows the system to maintain high tracking speed while achieving high measurement precision in the final tracking phase.
Solution Approach 2:
The drive device performs preliminary coarse positioning to bring the telescope close to the target position quickly, preparing the system for the subsequent fine adjustment phase. This preliminary action enables the system to achieve high tracking speed initially, then transition to high precision mode.
Data Source
AI summary
A laser tracking device includes an adjustment device, a telescope, and a drive device. The adjustment device modifies the emission direction of first light wave. The telescope emits the first light wave in the emission direction modified by the adjustment device. The drive device rotates the telescope based on a predicted path of a moving body. The adjustment device provides more precision in modifying the emission direction of the first light wave than in the drive device rotating the telescope. Further, the adjustment device modifies the emission direction to offset the modification of the emission direction caused by the rotation of the telescope from a time when a tracking start condition is satisfied until the moving body is detected.