Dual Optical Image Shake Correction Mechanism
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Solution Overview
Problem
Conventional image shake correction systems in image pickup apparatuses face performance reduction due to differences in photographer's hand shaking characteristics and photographing status, as they rely solely on expanding the correction angle, which affects the frequency band and overall image shake correction efficiency.
Innovation Solution
The system employs a dual optical correction mechanism, where a first optical correcting unit addresses low-frequency components and a second optical correcting unit addresses high-frequency components of the shake signal, using separate anti-shake lens drive units to optimize image shake correction across varying conditions without increasing the apparatus size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single optical correcting unit expands the correction angle to handle large image shake amounts, then the image shake correction amount increases, but the performance of image shake correction is reduced due to frequency band limitations and inability to adapt to different shaking characteristics
Solution Approach 1:
The patent divides the image shake correction function into two separate optical correcting units: a first optical correcting unit for low-frequency shake components and a second optical correcting unit for high-frequency shake components. This segmentation allows each unit to be optimized for its specific frequency range, improving overall correction performance and adaptability to different shaking characteristics without compromising reliability.
2Reliability
If the size of the image shake correcting unit is increased to increase the image shake correction amount, then the correction capability for large shake amounts improves, but the apparatus size increases
Solution Approach 1:
By segmenting the correction function into two specialized units handling different frequency ranges, the patent achieves high correction capability for large shake amounts without requiring a single oversized correcting unit. Each unit can be compact since it only needs to handle its specific frequency range, thus maintaining small apparatus size while improving reliability.
3Adaptability or versatility
If the correction angle is expanded to handle different photographing statuses, then the image shake correction amount increases, but the performance is reduced due to frequency band limitations
Solution Approach 1:
The patent segments the correction angle expansion into two specialized units: the first unit provides large correction angles for low-frequency shakes (effective for riding photography), while the second unit provides precise correction for high-frequency shakes (effective for walking photography). This segmentation maintains high correction performance across different photographing statuses by matching the appropriate unit to the shake characteristics.
Data Source
AI summary
An image pickup apparatus includes a shake detecting unit configured to detect a shake of the image pickup apparatus; and a first optical correcting unit and a second optical correcting unit configured to correct optically an image shake by using a shake signal output from the shake detecting unit, wherein the first optical correcting unit is used to correct optically the image shake based on frequency components lower than predetermined frequency components extracted from the shake signal, and wherein the second optical correcting unit is used to correct optically the image shake based on frequency components higher than the predetermined frequency components extracted from the shake signal.