Bayonet Mounting for Optical System Axial Alignment
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Solution Overview
Problem
Existing image capture devices face challenges in maintaining precise alignment between the integrated sensor and lens assembly (ISLA) and the modular lens, which can lead to misalignment and distortion in image or video capture, while also requiring a waterproof seal during lens installation and removal.
Innovation Solution
The implementation of a bayonet system with axial alignment surfaces and seals ensures precise axial alignment and decoupling of the ISLA and modular lens, allowing for easy replacement and maintaining a waterproof seal within the image capture device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed lens is used in the image capture device, then the device structure is simple, but the adaptability for different imaging situations is limited
Solution Approach 1:
The optical system is divided into two independent segments: a fixed ISLA containing sensor and rear lens elements, and a removable front lens module. This segmentation allows the front lens module to be exchanged for different imaging scenarios while the ISLA remains stationary, providing adaptability without requiring complete system redesign.
Solution Approach 2:
The bayonet mounting mechanism serves multiple functions: it provides mechanical attachment, ensures precise axial alignment through alignment surfaces, and maintains waterproof sealing. This multi-functional design allows a single mounting structure to handle diverse requirements of different lens modules.
2Ease of operation
If the ISLA and lens are directly connected, then alignment is maintained, but the lens cannot be easily replaced and waterproof sealing is compromised
Solution Approach 1:
The bayonet mounting mechanism incorporates pre-designed alignment surfaces that automatically guide and position the lens module in the correct axial position during installation. This preliminary alignment action ensures precise positioning before the lens is fully secured, eliminating the need for complex post-installation adjustment.
Solution Approach 2:
The bayonet mounting mechanism acts as an intermediary between the ISLA and the removable lens module. It provides a standardized interface that maintains precise alignment while enabling easy attachment and detachment, and incorporates sealing elements to protect the interface during lens changes.
3Reliability
If the lens module contacts the ISLA directly, then alignment is achieved, but water or moisture can penetrate between the components
Solution Approach 1:
The bayonet mounting mechanism incorporates flexible sealing elements (such as elastomeric rings or membranes) at the interface between the lens module and ISLA. These flexible seals conform to the mating surfaces and maintain waterproof integrity even during lens module attachment and detachment operations.
4Manufacturing precision
If conventional mounting methods are used, then components are connected, but precise axial alignment between lens module and ISLA is difficult to maintain
Solution Approach 1:
The bayonet mounting mechanism employs asymmetric alignment surfaces with specific geometric profiles that guide the lens module into precise axial alignment during installation. The asymmetric design provides mechanical constraints that prevent misalignment while maintaining simplicity in the mounting structure.
Data Source
AI summary
The present teachings provide an image capture device including an optical system having a bayonet. The bayonet is connected to a body of the image capture device. The bayonet includes a forward surface, a rearward surface opposing the forward surface, and a bayonet axial surface; and. The optical system includes an integrated sensor and lens assembly (ISLA) extending away from the rearward surface of the bayonet; and a lens module extending away from the forward surface of the bayonet and comprising a lens module axial surface, wherein the lens module axial surface contacts the bayonet axial surface so that the lens module is axially aligned with the bayonet.