Multi-Lens Image Sensor Alignment via Bias Device
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Solution Overview
Problem
In camera design, the increasing demand for computing power and additional functionality leads to larger integrated sensors, which complicates the alignment of lenses and sensors due to reduced packaging space, making it difficult to maintain precise alignment without interfering with the sensor or lens assembly.
Innovation Solution
A mounting structure, such as a bayonet mechanism, is used to connect the lens assembly within the camera while allowing the forward lens assembly to move relative to the rearward lens assembly, using a bias device and connector system that aligns the lenses along an optical axis without direct contact, enabling movement and flexibility to prevent damage from shocks or changes in orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the sensor size is increased to provide more computing power and additional functionality, then the sensor capability is improved, but the alignment precision between lenses and sensor deteriorates due to reduced packaging space
Solution Approach 1:
The lens system is divided into multiple lens assemblies (first lens assembly, second lens assembly, third lens assembly) that can be independently positioned and aligned. This segmentation allows each lens assembly to be precisely adjusted relative to the sensor without requiring the entire optical system to be rigidly fixed, thereby maintaining alignment precision even with larger sensor sizes.
Solution Approach 2:
A connector is introduced as an intermediary component between the lens assemblies and the sensor. The connector includes alignment features such as guides and positioning mechanisms that facilitate precise alignment of the lens assemblies with the sensor. This intermediary structure decouples the direct mounting relationship, allowing for better alignment control despite space constraints.
2Stability of the object's composition
If the lenses and sensor are rigidly connected to maintain alignment, then the alignment stability is improved, but the device complexity increases due to interference with sensor and lens assembly design
Solution Approach 1:
The connector is designed with movable components including springs and biasing mechanisms that allow dynamic adjustment of lens assembly positions. The first lens assembly can move relative to the second and third lens assemblies along the optical axis, enabling the system to maintain alignment stability while accommodating thermal expansion, mechanical shocks, and assembly tolerances without requiring an overly complex rigid structure.
Solution Approach 2:
The connector allows for parameter changes in the spacing and positioning of lens assemblies through its mechanical design. The distance between lens assemblies can be adjusted via the connector's movable components, enabling fine-tuning of alignment parameters to achieve optimal performance while maintaining stability.
Data Source
AI summary
The present teachings provide an image capture device including an optical system. The optical system includes a rearward lens assembly, a forward lens assembly, and a bias device. The forward lens assembly is axially aligned with the rearward lens assembly along an optical axis. The bias device is located between the rearward lens assembly and the forward lens assembly and is configured to allow the forward lens assembly to move relative to the rearward lens assembly.