Non-magnetic Probe Lens Alignment for High-Pixel Imaging Modules
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Solution Overview
Problem
Existing imaging module manufacturing methods fail to accurately position high-pixel imaging elements, leading to deviations in the lens optical axis and compromised imaging quality due to magnetic interactions during the assembly process.
Innovation Solution
A manufacturing method and apparatus that utilize a non-magnetic probe to maintain the lens unit's position and adjust the imaging element's inclination relative to the lens unit, ensuring precise alignment and preventing magnetic interference, using a voice coil motor with magnets and a non-magnetic contactor to drive the lens movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a magnetic body is used in the lens unit during manufacturing, then the lens drive unit can be actuated effectively, but the lens optical axis deviates due to magnetic attraction forces
Solution Approach 1:
A non-magnetic probe is introduced as an intermediary tool to hold and position the lens unit during the manufacturing process. This probe acts as a mediator that enables precise positioning without generating magnetic attraction forces, thus preventing lens optical axis deviation while the lens drive unit is actuated
Solution Approach 2:
The material property of the holding tool is changed from magnetic to non-magnetic. By using a non-magnetic probe instead of a magnetic body to hold the lens unit, the magnetic attraction force is eliminated, allowing the lens optical axis to remain stable during manufacturing operations
2Measurement precision
If high-pixel imaging elements are used, then imaging quality is improved, but positioning accuracy requirements increase significantly
Solution Approach 1:
The magnetic holding mechanism is replaced with a mechanical non-magnetic probe holding system. This substitution eliminates magnetic interference that would affect positioning accuracy, enabling the high precision required for mounting high-pixel imaging elements
Solution Approach 2:
The non-magnetic probe serves as a precise intermediary tool for positioning both the lens unit and imaging element unit. It enables accurate alignment and positioning without introducing magnetic forces that would compromise positioning precision required for high-pixel imaging elements
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 approach allows for high-accuracy positioning of the imaging element and lens unit, enhancing imaging quality by preventing magnetic forces from causing lens axis deviations during assembly, particularly effective for high-pixel imaging modules.
Implementation Method 1
the lens drive unit includes two lens driving units which respectively move at least a portion of lenses of the lens group in two directions orthogonal to an optical axis of the lens group
Implementation Method 2
the two lens driving units have voice coils and magnets facing the voice coils
Implementation Method 3
a contactor of a first probe having the contactor including a main body formed of a non-magnetic material is pressed to the electric connection portion of the lens unit and electricity flows to the lens drive unit
Data Source
AI summary
A manufacturing method of an imaging module and an imaging module manufacturing apparatus capable of performing positioning of an imaging element unit and a lens unit with high accuracy are provided. A manufacturing apparatus 200 holds a lens unit 10 and an imaging element unit 20 on a Z axis, and images a measurement chart by an imaging element 27 in a state where a probe 113a comes into contact with each of terminals 14A to 14F electrically connected to an x-direction VCM 16A, a y-direction VCM 16C, and a z-direction VCM 16E of the lens unit 10 and electricity flows to a lens drive unit 16 inside the lens unit 10. A contactor of the probe 113a is configured of a non-magnetic material.