Shake Correction Lens Dual Drive Mechanism for Precision Image Stabilization
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Solution Overview
Problem
Existing lens devices for imaging apparatuses face challenges in accurately correcting camera shake and image shift, leading to suboptimal image quality due to limitations in precision and control of shake correction mechanisms.
Innovation Solution
A lens device with a shake correction lens system that includes a first drive mechanism for moving the shake correction lens along a coordinate plane intersecting the optical axis, and a second drive mechanism for shifting the lens, both controlled by a processor to achieve precise correction and shifting operations, utilizing voice coil motors and piezoelectric elements for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single drive mechanism is used to correct image shake, then the device complexity is reduced, but the manufacturing precision and image quality deteriorate due to inability to perform both shake correction and image shifting with high accuracy
Solution Approach 1:
The drive system is segmented into two independent drive mechanisms: a first drive mechanism for shake correction and a second drive mechanism for image shifting. This segmentation allows each mechanism to be optimized for its specific function, with the first mechanism handling high-frequency shake correction and the second mechanism handling precise sub-pixel image positioning, thereby resolving the contradiction between device simplicity and correction precision
Solution Approach 2:
The shake correction lens serves multiple functions: it corrects image shake through the first drive mechanism and enables image shifting through the second drive mechanism. This multi-functionality allows a single lens element to handle both stabilization and precise positioning tasks, improving overall system efficiency while maintaining high manufacturing precision
2Device complexity
If only shake correction is performed without image shifting capability, then the device complexity is reduced, but the adaptability deteriorates due to inability to perform autofocus and precise image positioning
Solution Approach 1:
The shake correction lens is designed to perform multiple functions: shake correction via the first drive mechanism and image shifting via the second drive mechanism. This enables the lens to support both stabilization and autofocus operations, significantly improving adaptability without adding separate dedicated components for each function
Solution Approach 2:
The system dynamically switches between shake correction mode and image shifting mode based on operational requirements. The control unit coordinates the two drive mechanisms to perform appropriate operations, allowing the lens to adapt to different imaging scenarios such as video recording (requiring shake correction) and photography (requiring precise focusing)
3Measurement precision
If feedback control is implemented for precise shake correction, then the measurement precision is improved, but the loss of time increases due to continuous monitoring and adjustment cycles
Solution Approach 1:
A feedback control system is implemented where the control unit continuously monitors shake correction performance and adjusts the first drive mechanism accordingly. This feedback mechanism ensures high measurement precision in shake detection and correction, maintaining accurate image stabilization through real-time adjustments
Solution Approach 2:
The feedback control operates in optimized periodic cycles, performing measurements and adjustments at intervals suited to the frequency of camera shake. This periodic action balances the need for continuous correction with the time required for processing, preventing excessive time loss while maintaining correction effectiveness
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 solution enables more accurate and precise correction of camera shake and image shift, improving image quality by allowing for feedback control and sequence-based movements that align with pixel pitch or smaller shifts, thereby enhancing the overall performance of the imaging apparatus.
Implementation Method 1
a first drive mechanism that moves the shake correction lens in a direction in which the shake of the image is corrected, by applying power to the shake correction lens
Implementation Method 2
utilizing voice coil motors and piezoelectric elements for enhanced accuracy
Data Source
AI summary
Provided is a lens device provided in an imaging apparatus body including an image sensor, the lens device including a lens that includes a shake correction lens correcting a shake of an image obtained by imaging light on the image sensor, and images the light, which is incident, on the image sensor, a first drive mechanism that moves the shake correction lens in a direction in which the shake of the image is corrected, by applying power to the shake correction lens along a coordinate plane intersecting an optical axis of the lens, and a second drive mechanism that moves the shake correction lens in a direction in which the image is shifted, by applying power to the shake correction lens along the coordinate plane.