Image Stabilization Apparatus with Inclined Spherical Stoppers
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Solution Overview
Problem
Conventional image stabilization methods face challenges in accurately adjusting the center position of a tilt correction lens due to collisions with mechanical end stoppers, leading to unstable and scattered measured values, especially when the tilt unit moves on a spherical surface.
Innovation Solution
An image stabilization apparatus with a movable member holding the correction lens that moves on a spherical surface with a predetermined point as the center, featuring inclined stopper surfaces on both the movable member and base member to stabilize the center position, allowing precise adjustment by controlling the tilt angle of the tilt correction lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tilt unit moves on a spherical surface around the optical axis for image stabilization, then the image stabilization function is achieved, but the collision angle between mechanical stoppers becomes unstable and the center position adjustment becomes inaccurate
Solution Approach 1:
The movable member is designed to move on a spherical surface around a predetermined point on the optical axis, with the inclined surface configured as a conical surface whose extended line passes through the center of the spherical surface. This curved geometry enables the tilt unit to stabilize on the spherical surface while the conical inclined surface ensures stable collision between stoppers, resolving the contradiction between achieving image stabilization and maintaining accurate center position adjustment.
2Ease of operation
If the tilt unit collides with cylindrical mechanical end stoppers, then the movable range is restricted, but the collision causes the tilt unit to go up and down and scatter measured values
Solution Approach 1:
The stoppers are configured with inclined surfaces that form conical surfaces, where the extended line of the conical surface passes through the center of the spherical surface on which the movable member moves. This conical geometry ensures that during collision, the reaction force acts along the radial direction toward the center of the spherical surface, preventing the tilt unit from moving up and down and eliminating scattering of measured values.
3Reliability
If the stoppers collide at varying angles according to the tilt unit angle, then the mechanical end stop function is provided, but the collision angle becomes unstable
Solution Approach 1:
The inclined surfaces of both the movable member and base member are configured as conical surfaces with their extended lines passing through the center of the spherical surface. This geometric configuration ensures that regardless of the tilt angle, the collision always occurs at a consistent angular relationship relative to the spherical center, providing stable and repeatable collision angles for accurate center position adjustment.
Data Source
AI summary
An image stabilization apparatus includes a correction lens, a movable member configured to hold the correction lens and to move on a spherical surface with a predetermined point as a center on an optical axis for an image stabilization, and a base member configured to movably hold the movable member and including a second surface that contacts a first surface on the movable member when the movable member moves. At least one of the first surface on the movable member and the second surface on the base member inclines to the predetermined point so as to approach to the optical axis.