Dual-Lens Position Correction for Faster Focus Control
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Solution Overview
Problem
Conventional lens apparatuses face challenges in accurately correcting control errors of multiple lenses due to differences in focus sensitivity and position deviations, leading to inefficiencies in drive time and image quality.
Innovation Solution
A control apparatus that switches between using a first optical element (e.g., zoom lens) and a second optical element (e.g., focus lens) to correct control errors based on factors such as drive amount, electrification state, correctable amount, position deviation, and lens control mode, utilizing a switching unit to optimize correction by determining the most suitable lens for the current conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction drive is performed using a single lens apparatus, then the control error can be corrected, but the drive time increases and image quality deteriorates due to suboptimal correction
Solution Approach 1:
The patent dynamically switches between different lens apparatuses (first and second focus lenses) based on real-time conditions such as drive amount, electrification state, and correctable amount. This dynamic selection optimizes the correction process by choosing the most suitable lens for each specific situation, thereby reducing drive time while maintaining correction accuracy.
Solution Approach 2:
The system changes operational parameters by selecting different lens apparatuses based on varying conditions. The control unit evaluates multiple parameters (drive amount, electrification state, correctable amount) and switches between lens apparatuses to optimize the correction process, effectively managing the trade-off between correction accuracy and drive time.
2Manufacturing precision
If correction drive is performed using a single lens apparatus, then the control error can be corrected, but image quality deteriorates due to aberrations and focus shifts
Solution Approach 1:
The system dynamically selects between different lens apparatuses based on real-time conditions to minimize aberrations and focus shifts. By choosing the most appropriate lens for each correction scenario, the system reduces harmful optical effects while maintaining correction accuracy.
Solution Approach 2:
The control unit evaluates multiple parameters including drive amount and correctable amount to determine which lens apparatus will produce fewer aberrations and focus shifts. This parameter-based selection optimizes image quality during the correction process.
3Manufacturing precision
If multiple lens apparatuses are used for correction, then correction accuracy and image quality improve, but device complexity increases
Solution Approach 1:
The patent implements a universal control unit that can manage multiple lens apparatuses (first and second focus lenses) through a unified control mechanism. This multi-functional approach allows the system to handle different correction scenarios using a single control architecture, reducing the overall complexity despite having multiple lens apparatuses.
Data Source
AI summary
A control apparatus configured to control a first optical element and a second optical element that are movable in an optical axis direction includes at least one processor that executes instructions to move at least one of the first optical element and the second optical element to a target position, and correct a control error of the target position by moving the first optical element or the second optical element in the optical axis direction. The processor is configured to switch between using the first optical element and using the second optical element to correct the control error of the target position.