Image Sensor Module Focus Adjustment via Spring-Mediated Linear Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image sensor modules face challenges in adjusting focus, particularly when multi-lens systems are used, as some lenses may be outside the sensing region, leading to incomplete light capture and image blurring due to tilt issues, which cannot be easily resolved by prior art designs.
Innovation Solution
Incorporating springs between the holder and lens barrel, with screws passing through holes in the lens barrel to exert force and maintain lens alignment, allowing for precise adjustment of the focus without rotating the lens module, ensuring all lenses remain within the sensing region and addressing tilt problems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens barrel is rotated to adjust focus, then the distance between the image sensor and lens module is adjusted, but some lenses may move outside the sensing region causing incomplete light capture
Solution Approach 1:
The lens module is divided into multiple individual lenses (e.g., four lenses) that are independently positioned within the lens barrel. Each lens can be independently aligned with the sensing region through the spring mechanism, ensuring that all lenses remain within the sensing region during focus adjustment.
Solution Approach 2:
A spring mechanism is introduced as an intermediary between the lens barrel and the holder. The spring allows for linear movement of the lens module along the optical axis while maintaining lens alignment, serving as a mediator that enables focus adjustment without rotating the lens module.
2Measurement precision
If the lens barrel is rotated to adjust focus, then the distance between the image sensor and lens module is adjusted, but the lens module may tilt causing image blurring
Solution Approach 1:
The spring mechanism provides a dynamic adjustment system that allows the lens module to move linearly along the optical axis in response to screw rotation, while the spring's elastic properties maintain constant lens alignment. This dynamic system enables focus adjustment without introducing tilt or misalignment.
Solution Approach 2:
The traditional mechanical rotation system for focus adjustment is replaced with a linear movement system driven by a screw mechanism. Instead of rotating the entire lens module, the screw converts rotational motion into linear motion of the lens module along the optical axis, eliminating tilt problems.
3Ease of operation
If a screw mechanism is used to adjust focus, then the distance between holder and lens barrel is adjusted, but the structure becomes more complex
Solution Approach 1:
The screw mechanism serves multiple functions: it adjusts the distance between the holder and lens barrel for focus control, maintains lens alignment through the spring mechanism, and prevents lens module tilt. This multi-functional design reduces the need for additional separate components.
Solution Approach 2:
The spring mechanism and screw adjustment system are combined into a single integrated assembly. The spring is positioned between the holder and lens barrel, and the screw passes through the lens barrel to engage with the spring, merging the cushioning function and adjustment function into one compact mechanism.
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 solution enables precise focus adjustment and prevents image blurring by maintaining lens alignment, ensuring all lenses are within the image sensor's sensing region and allowing for easy correction of tilt issues, resulting in clear images.
Implementation Method 1
The spring is positioned between the holder and the lens barrel, and the spring exerts forces on the holder and the lens barrel
Data Source
AI summary
An image sensor module includes a substrate, an image sensor mounted on the substrate, a holder position on the substrate, a lens barrel for holding a lens module and at least one spring. The spring is positioned between the holder and the lens barrel, and the spring exerts forces on the holder and the lens barrel; and the lens barrel has at least one hole, and a screw penetrates through the hole and is screwed into the holder.