Counter-Rotating Optical Assembly for Low-Vibration Motion Imaging
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Solution Overview
Problem
Existing motion imaging compensation devices fail to meet imaging conditions due to increasing reciprocating frequency during high-speed reciprocating motion, leading to vibration and image degradation.
Innovation Solution
A motion imaging compensation device with a primary rotating structure and a secondary rotating structure, where the secondary rotating structure rotates opposite to the primary, dynamically balanced and in a vacuum or air-thin sealing environment, to maintain a constant optical path and reduce vibration, combined with a control system to adjust rotation speed and distance between rotating structures for precise motion compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If reciprocating motion method is used to reduce relative motion velocity, then motion blur is reduced, but reciprocating frequency increases causing high-frequency vibration and failure to meet imaging conditions
Solution Approach 1:
The motion compensation is divided into two independent rotating structures: a primary rotating structure that rotates in one direction and a secondary rotating structure that rotates in the opposite direction. This segmentation allows each structure to handle specific aspects of motion compensation, preventing the frequency buildup that occurs in single reciprocating motion systems.
Solution Approach 2:
The secondary rotating structure rotates in the opposite direction to the primary rotating structure. This inversion of rotation direction creates a compensating effect where the two rotations work together to cancel relative motion while maintaining stable frequency characteristics, avoiding the high-frequency vibration problem of conventional reciprocating motion.
2Productivity
If reciprocating motion frequency is increased to compensate for high relative motion speed, then motion compensation effectiveness improves, but vibration amplitude increases and imaging conditions are not met
Solution Approach 1:
The compensation system is segmented into two rotating structures with independent rotation control. The primary rotating structure handles the main motion compensation while the secondary rotating structure provides additional compensation and vibration cancellation. This segmentation allows the system to achieve high compensation effectiveness without the vibration problems of single-structure high-frequency reciprocating motion.
Solution Approach 2:
By having the secondary rotating structure rotate in the opposite direction to the primary structure, the system creates a vibration-cancelling effect. The opposite rotation directions cause the vibrations generated by each structure to partially cancel each other out, allowing high compensation effectiveness without proportionally increasing vibration amplitude.
3Device complexity
If single reciprocating rotating structure is used, then device complexity is reduced, but vibration increases at high frequencies preventing meeting of imaging conditions
Solution Approach 1:
The system segments the motion compensation function into two rotating structures rather than using a single complex reciprocating structure. This segmentation simplifies each individual structure while the combined system achieves superior vibration performance and reliability for meeting imaging conditions.
Solution Approach 2:
Two rotating structures are merged into a single motion compensation system that works together to cancel relative motion and vibration. The primary and secondary rotating structures are combined in such a way that their opposite rotations create a synergistic effect, achieving better vibration cancellation and imaging condition compliance than a single structure could achieve alone.
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
Enables high-speed motion compensation with minimal vibration, maintaining image quality by keeping relative motion velocity differences within a threshold, allowing for efficient and accurate imaging under varying motion conditions.
Implementation Method 1
the primary rotating structure is configured to rotate to enable a component of a linear velocity of the optical assembly connected to the secondary rotating structure in a direction of the primary optical axis of the imaging unit to be the same as a relative motion velocity of the imaging target
Implementation Method 2
the rotation direction of the primary rotating structure is opposite to that of the secondary rotating structure, and a rotating angular velocity of the primary rotating structure is the same as that of the secondary rotating structure
Implementation Method 3
the control system is configured to control operation of the motion imaging compensation device... a control system to adjust rotation speed and distance between rotating structures for precise motion compensation
Implementation Method 4
dynamically balanced and in a vacuum or air-thin sealing environment, to maintain a constant optical path and reduce vibration
Data Source
AI summary
Disclosed are a motion imaging compensation device and method, relating to imaging technology. The motion imaging compensation device includes a base, an imaging unit, a motion compensation unit and a control system. The base is configured to support the imaging unit, the motion compensation unit and the control system. The motion compensation unit includes a primary rotating structure, a secondary rotating structure and an optical assembly. A rotation shaft of the secondary rotating structure is parallel to that of the primary rotating structure in the three-dimensional space, with an opposite rotating direction. The secondary rotating structure is connected to the optical assembly to drive it to rotate. Rotations of the primary rotating structure and the secondary rotating structure are controlled according to a preset control procedure. The imaging field of view is imaged in a relatively stationary state in a preset motion compensation interval.