Dual Optical Correcting Units for Image Shake Stabilization
Find Innovative SolutionsGenerate Solutions
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 conditions, limiting their ability to correct image shake effectively.
Innovation Solution
An image pickup apparatus with a shake detecting unit, first and second optical correcting units that move perpendicular to the optical axis, and position detecting units, controlled by a unit that adjusts the position of these correcting units based on shake signals and position detection signals to optimize image shake correction across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image shake correcting unit size is increased to increase the image shake correction amount, then the correction capability is improved, but the device size increases
Solution Approach 1:
The image shake correcting unit is divided into multiple correcting units (first correcting unit and second correcting unit), each responsible for correcting shake in different directions. This segmentation allows each unit to be smaller while collectively providing comprehensive correction capability across multiple axes, resolving the contradiction between correction capability and unit size.
2Adaptability or versatility
If the correction angle is expanded to handle various hand shaking characteristics, then the adaptability is improved, but the performance reduction occurs under specific conditions
Solution Approach 1:
The patent employs dynamic control where the controlling unit adjusts the operation of correcting units based on detected shake characteristics. The system dynamically selects which correcting units to activate and their respective correction amounts according to the actual shaking pattern, ensuring optimal performance across different conditions rather than using a fixed correction approach.
Solution Approach 2:
The system changes operational parameters of the correcting units based on detected shake characteristics. By adjusting correction amounts, selection of correcting units, and operational modes according to the specific shaking pattern detected by the shake detection unit, the system adapts to various hand shaking characteristics while maintaining high correction performance.
3Device complexity
If a single correcting unit is used to simplify the structure, then the device complexity is reduced, but the correction performance varies under different conditions
Solution Approach 1:
The correcting function is segmented into multiple independent correcting units, each optimized for specific shake directions or characteristics. This segmentation allows the system to maintain simpler individual units while achieving more reliable and consistent overall performance through coordinated operation of multiple specialized units.
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
This configuration enhances image shake correction performance by adapting to different hand shaking characteristics and photographing conditions, ensuring effective image stabilization without increasing the size of the correction unit.
Implementation Method 1
An image shake correcting lens provided in an imaging optical system is moved depending on the result of the detection. Thereby, the image focused in a light-receiving plane of an imaging element is moved to correct the image shake by altering the direction of an optical axis in the imaging optical system.
Data Source
AI summary
An image pickup apparatus includes a shake detecting unit configured to detect a shake of the image pickup apparatus; a first and a second optical correcting unit configured to move in a direction different from an optical axis so as to correct optically an image shake; a first position detecting unit configured to detect a position of the first optical correcting unit and output a first position detection signal; a second position detecting unit configured to detect a position of the second optical correcting unit and output a second position detection signal; and a controlling unit configured to control the first optical correcting unit and the second optical correcting unit. A range for detecting a position of the first position detecting unit is different from that of the second position detecting unit.