Imaging Device Blur Correction Using Image Circle Data
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Solution Overview
Problem
Existing imaging devices face challenges in performing image blur correction when using interchangeable lenses that are not optimized for the system, leading to insufficient information for drive control, resulting in suboptimal image quality due to inadequate light balance at the image periphery.
Innovation Solution
An imaging device with a processor and memory that performs image blur correction by determining the drive control range based on the difference between the second length and positioning accuracy of the imaging element at the center of the mount part, using detection information from a shake detection unit to adjust the imaging element's position and ensure balanced light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image blur correction is performed by driving an image blur correction member in the interchangeable lens, then image blur correction can be achieved, but the brightness of the peripheral portion of the captured image deteriorates due to insufficient light
Solution Approach 1:
Instead of moving the correction lens in the interchangeable lens to achieve image blur correction, this patent inverts the approach by moving the imaging element in the main body part. This allows the main body to actively compensate for blur while keeping the lens stationary, thereby avoiding the light loss that occurs when the correction lens is moved at the lens end.
2Adaptability or versatility
If the control unit cannot transmit and receive information required for image blur correction, then the drive control range of the imaging element cannot be determined, but image blur correction can still be performed by driving the correction lens in the interchangeable lens
Solution Approach 1:
The main body part independently determines the drive control range of the imaging element based on its own specifications and the detected shake amount, without requiring communication with the interchangeable lens. This self-service approach allows the system to perform image blur correction even when the lens does not provide the necessary information, thereby maintaining compatibility with any interchangeable lens.
3Reliability
If the drive control range of the imaging element is not properly determined, then image blur correction effectiveness deteriorates, but the system can still operate with interchangeable lenses that are not optimized for the system
Solution Approach 1:
The control unit dynamically adjusts the drive control range of the imaging element based on the detected shake amount and the calculated second length. By changing the control parameters (drive range) according to the specific situation and lens characteristics, the system maintains effective image blur correction while being compatible with various interchangeable lenses, including those not optimized for the system.
Data Source
AI summary
A lens device is able to be installed in an imaging device via a mount part. The imaging device comprises a correction unit performing image blur correction through driving of an imaging element and a control unit which controls driving of the correction unit. The control unit determines a range of an amount of drive control of the correction unit on the basis of a difference between a second length and a positioning accuracy when the imaging element is positioned at the center of the mount part using the correction unit. The second length is obtained by subtracting a diagonal length associated with an imaging range of the imaging element from a first length corresponding to a closest distance to the center of the mount part from a circumference of an imaging circle when viewed from an optical axis direction of an imaging optical system included in the lens device.