Dual Corrector Image Stabilization Controller
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Solution Overview
Problem
Existing interchangeable lens imaging systems with image stabilization functions require a long time to prepare for image stabilization due to calculations and movements, which can lower continuous capturing speed.
Innovation Solution
An optical apparatus with a first corrector and a second corrector for image stabilization, controlled by a controller that determines the optimal drive method based on imaging conditions to move either both correctors or only one during imaging, allowing for efficient image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both the correction lens and image sensor are moved during imaging for image stabilization, then image stabilization effectiveness is improved, but continuous capturing speed deteriorates due to calculation time and movement time
Solution Approach 1:
The system dynamically switches between two drive modes (first drive moving both correctors, second drive moving only one corrector) based on imaging conditions. This dynamic adaptation allows the system to optimize between image stabilization effectiveness and continuous capturing speed by selecting the appropriate drive mode for each shooting scenario.
Solution Approach 2:
The controller changes the operational parameters of the image stabilization system by adjusting which correctors are activated based on imaging conditions. When the second drive is selected, the system changes the state from moving both correctors to moving only one, thereby reducing preparation time and improving continuous capturing speed while maintaining adequate stabilization.
2Reliability
If the correction lens is moved to the center position before imaging starts, then image stabilization preparation is improved, but the time required for imaging preparation increases
Solution Approach 1:
The system performs preliminary actions selectively by moving the correction lens to the center position only when necessary (based on imaging conditions) rather than always before imaging. This conditional preliminary action reduces unnecessary preparation time while ensuring stabilization readiness when needed.
Solution Approach 2:
The system dynamically determines whether to perform the preliminary action of moving the correction lens to the center position based on imaging conditions. This dynamic decision-making process eliminates fixed preparation routines that always incur time costs, allowing the system to adapt preparation time to actual needs.
3Measurement precision
If calculation of image sensor moving amount is performed based on correction lens position, then image stabilization accuracy is improved, but processing time increases
Solution Approach 1:
The system changes the calculation parameters by selectively performing detailed moving amount calculations only when the first drive mode is selected (moving both correctors). When the second drive mode is selected, the system uses simplified or pre-determined parameters, thereby reducing calculation time while maintaining sufficient stabilization accuracy for the given imaging conditions.
Data Source
AI summary
A lens apparatus attachable to a camera that includes a first corrector configured to move configured to move for an image stabilization includes a second corrector configured to move for the image stabilization, and a controller configured to control, based on an imaging condition, the second corrector according to a first drive that moves both the first corrector and the second corrector during imaging, or a second drive that moves only one of the first corrector and the second corrector during the imaging.