Image Stabilizing Apparatus Compact Lens Barrel Design
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Solution Overview
Problem
Conventional image stabilizing apparatuses face challenges in achieving high detection accuracy while minimizing size, as detectors are often affected by the magnetic field of the coil or require additional space when placed outside the coil, leading to a larger lens barrel.
Innovation Solution
The apparatus employs Hall IC detectors positioned at specific angles relative to the optical axis, allowing for accurate detection of position information in orthogonal directions without being affected by the magnetic field, enabling a more compact design by eliminating the need for a roll preventive mechanism and reducing the number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If detectors are disposed inside the coil, then the lens barrel size can be reduced, but detection accuracy deteriorates due to magnetic field interference
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional spatial arrangement by positioning detectors at different radial distances (first radius and second radius) and different axial positions (first position and second position) from the optical axis. This multi-dimensional configuration allows detectors to be distributed in space rather than confined to a single plane, enabling compact design while maintaining detection accuracy through geometric diversity.
Solution Approach 2:
The patent assigns different detection directions to different detectors based on their specific spatial positions. Detectors at different radial distances and axial positions detect position information in different directions orthogonal to the optical axis. This local differentiation of detection functions allows each detector to optimally utilize its position, achieving accurate three-dimensional position detection while maintaining a compact lens barrel structure.
2Measurement precision
If detectors are disposed outside the coil, then detection accuracy is maintained, but the lens barrel becomes larger due to additional space requirements
Solution Approach 1:
The patent nests the detection system within the existing coil structure by positioning detectors at different radial distances from the optical axis, with inner detectors closer to the axis and outer detectors farther away. This nested arrangement allows multiple detectors to be accommodated within the same spatial envelope as the coil, eliminating the need for additional external space while maintaining detection accuracy through multi-point measurement.
Solution Approach 2:
The patent utilizes the axial dimension (distance from the image plane along the optical axis) in addition to the radial dimension to position detectors. By arranging detectors at different axial positions (first position and second position) and different radial distances, the system achieves three-dimensional spatial distribution within a compact volume, preventing lens barrel enlargement while ensuring accurate detection.
3Device complexity
If three detectors are arranged on the same plane, then the structure is simplified, but the cutout amount is reduced and the lens barrel becomes larger
Solution Approach 1:
The patent extends the detector arrangement from a two-dimensional planar configuration to a three-dimensional spatial configuration by positioning detectors at different axial distances from the image plane. This spatial distribution allows detectors to be arranged more efficiently in three-dimensional space, achieving the same detection functionality with a more compact overall structure and larger cutout amount.
Solution Approach 2:
The patent divides the detection function across multiple detectors positioned at different spatial locations, with each detector responsible for detecting position information in specific directions. This segmentation of detection functions allows the system to achieve comprehensive three-dimensional position detection while maintaining a compact structure, as each detector can be optimally positioned for its specific detection task.
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 achieves high detection accuracy and reduces the size of the image stabilizing apparatus, allowing the driver to be positioned in a way that overlaps part of the apparatus in the optical axis direction, resulting in a smaller lens barrel.
Implementation Method 1
detectors configured to detect position information on the optical system
Data Source
AI summary
An image stabilizing apparatus includes a driver configured to drive an optical system configured to correct an image blur in a direction that includes a component in a direction orthogonal to an optical axis, detectors configured to detect position information on the optical system, and a controller configured to control the driver. The detectors are disposed at a first detecting position and a second detecting position on a plane orthogonal to the optical axis. At the first detecting position, position information in a first detecting direction and position information in a second detecting direction different from the first detecting direction are detected. At the second detecting position, position information in a third detecting direction is detected. At least two of the first to third detecting directions are orthogonal to each other.