Optical Path Folding Motor Layout for Low Focus Shift Stabilization
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Solution Overview
Problem
Current image stabilization motors in long-focus lenses suffer from low driving precision, leading to significant focus shift and degraded image quality due to improper axis alignment during optical image stabilization.
Innovation Solution
The drive motor is designed with specific axis configurations and support structures to minimize focus shift by positioning the first axis on the mounting side close to the light outlet and ensuring parallel alignment with the optical element's emergent surface, utilizing magnetic and elastic components for stable rotation and compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the first axis is positioned on the mounting oblique surface close to the light outlet, then image stabilization precision is improved and focus shift is reduced, but the structural complexity increases
Solution Approach 1:
The patent applies local quality by positioning the first axis specifically on the mounting oblique surface close to the light outlet, rather than using a generic axis position. This localized positioning optimizes the optical path and minimizes focus shift in the critical region where light exits the system, thereby improving image stabilization precision without requiring complete redesign of the entire structure.
Solution Approach 2:
The patent introduces a new spatial dimension by utilizing the mounting oblique surface as the axis location, which is a three-dimensional positioning approach. By placing the first axis on the oblique surface rather than on a flat mounting plane, the design creates optimal optical geometry that reduces focus shift while maintaining structural feasibility.
2Manufacturing precision
If the first axis is perpendicular to the plane containing the first and second directions, then optical alignment is improved, but the device complexity increases
Solution Approach 1:
The patent employs asymmetry by making the first axis perpendicular to the plane containing the first direction (light inlet to optical element) and second direction (optical element to light outlet). This perpendicular orientation creates an asymmetric three-dimensional configuration that optimizes optical alignment and minimizes aberrations, while the asymmetric design is integrated into the mounting structure to avoid excessive complexity.
3Reliability
If magnetic pieces and elastic pieces are used for stable rotation, then reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges magnetic pieces and elastic pieces into an integrated rotation control mechanism. The magnetic pieces provide stable rotational positioning through magnetic attraction, while the elastic pieces provide restoring force and dampening. By combining these two functional elements working together, the system achieves reliable stable rotation without requiring separate complex control mechanisms for each function.
Solution Approach 2:
The patent replaces traditional mechanical rotation control mechanisms with a magnetic field-based system. Instead of using mechanical gears, cams, or physical stoppers for rotation stability, the design uses magnetic pieces that interact through magnetic fields to provide stable rotational positioning and control, thereby reducing mechanical complexity while improving reliability.
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 design enhances image stabilization precision, reduces focus shift, and improves imaging quality by minimizing interference and maintaining optical alignment, while also facilitating miniaturization and reducing power consumption.
Implementation Method 1
Light is emitted into the drive motor from the light inlet in a first direction, and is emitted out of the drive motor from the light outlet in a second direction after reflecting off the first optical element
Implementation Method 2
a first drive mechanism, configured to drive the first bracket to rotate around a first axis relative to the base
Data Source
AI summary
A drive motor is provided, which has a light inlet and a light outlet, and includes a base, a first bracket movably connected to the base and a first drive mechanism, where the first bracket includes a mounting oblique surface, a side that is of the mounting oblique surface and that faces the light inlet and the light outlet is a mounting side, the first drive mechanism is configured to drive the first bracket to rotate around a first axis relative to the base, where the first axis is parallel to the mounting oblique surface. Light is emitted into the drive motor from the light inlet in a first direction, and is emitted out of the drive motor from the light outlet in a second direction after reflecting off the first optical element.