Periscope Lens Drive 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 shifts and degraded image quality due to the orientation of the optical elements during rotation.
Innovation Solution
A drive motor design with specific axis orientations and support structures that minimize focus shift by positioning the rotation axes to reduce interference between optical elements, enhancing stabilization precision and imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical folding element is driven by a conventional image stabilization motor to rotate around an axis perpendicular to the optical path, then optical image stabilization is achieved, but significant focus shift occurs leading to degraded image quality
Solution Approach 1:
The patent changes the rotation axis position parameter from the conventional design (axis perpendicular to optical path at a distance) to a new configuration where the rotation axis passes through or near the optical folding element. This parameter change reduces the moment arm and minimizes focus shift while maintaining stabilization functionality
Solution Approach 2:
The patent introduces a second rotation axis perpendicular to the first axis, creating a gimbally-mounted dual-axis rotation system. This dimensional addition allows the optical folding element to stabilize in multiple directions while the first axis rotation provides primary stabilization with minimal focus shift
2Volume of moving object
If the periscope structure is used for miniaturization of long-focus lenses, then the lens size is reduced, but driving precision of the image stabilization motor becomes insufficient
Solution Approach 1:
The patent changes the motor drive parameters including rotation speed, acceleration, and positioning precision to match the miniaturized periscope structure. The drive mechanism is optimized with adjusted torque and rotational characteristics to achieve high precision stabilization within the compact form factor
Solution Approach 2:
The patent replaces conventional mechanical image stabilization mechanisms with a magnetically-driven system where magnetic pieces interact with drive coils to rotate the optical folding element. This substitution enables more precise control and better integration with the miniaturized periscope structure
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
The proposed drive motor design effectively reduces focus shift, improving image stabilization precision and overall imaging quality while allowing for miniaturization and reduced power consumption.
Implementation Method 1
an optical folding element and a lens group that are arranged from an object side to an image side, and the optical folding element is driven by an image stabilization motor to move, to achieve optical image stabilization
Data Source
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AI summary
This application provides a drive motor and a related product thereof. The drive motor has a light inlet and a light outlet. The drive motor includes: a base; a first bracket movably connected to the base, 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, and the mounting side is configured to mount a first optical element; and a first drive mechanism, 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. The first direction intersects with the second direction, and the first axis is located on the mounting side of the mounting oblique surface, and is perpendicular to a plane on which the first direction and the second direction are located. The drive motor in this application has a smaller focus shift, higher image stabilization precision, and better imaging quality.