Optical Component Sealing Structure for Waterproof Lens Systems
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Solution Overview
Problem
In waterproof cameras, especially wide-angle lens systems, the incorporation of optical elements is challenging due to lens shift issues caused by rubber gaskets, leading to improper image formation and increased flare light, and the gaskets often drop off during assembly, complicating the incorporation process.
Innovation Solution
An optical component with a ring-shaped sealing member, a stepped portion on the circumference surface to restrict movement towards the front, and a movement-restricting portion at the rear to prevent the sealing member from moving, ensuring proper incorporation and reducing flare light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber gasket is used to seal the lens in the case body, then waterproofing is achieved, but the lens position shifts in the optical axis direction due to repulsive force from the gasket
Solution Approach 1:
The sealing structure is divided into two functional parts: a rubber gasket for waterproofing and a stepped portion for positioning. The stepped portion creates a mechanical stop that prevents the lens from shifting while the rubber gasket maintains the waterproof seal.
Solution Approach 2:
The stepped portion acts as an intermediary element between the rubber gasket and the lens. It transfers the sealing function from the gasket alone to a combined structure where the stepped portion provides mechanical support and positioning, preventing the gasket's repulsive force from shifting the lens.
2Manufacturing precision
If a stepped portion is formed on the lens circumference surface to prevent lens shift, then lens positioning is improved, but harmful light enters from outside the angle of view causing flare light
Solution Approach 1:
The stepped portion is designed with specific local characteristics: it is positioned at a predetermined height and has a specific radial position. This localized structure provides positioning functionality only where needed while minimizing its impact on light paths and preventing flare light generation.
3Reliability
If the rubber gasket is compressed to secure the lens, then sealing is improved, but the gasket may drop off during assembly or disassembly operations
Solution Approach 1:
The assembly process is segmented into positioning (using the stepped portion) and sealing (using the rubber gasket) functions. This separation allows the lens to be properly positioned before sealing, preventing the gasket from being compromised during assembly operations.
Solution Approach 2:
The stepped portion is pre-formed on the lens to create a positioning structure before assembly. This preliminary positioning feature ensures the lens is correctly located and secured by the rubber gasket during assembly, preventing drop-off and simplifying the assembly process.
4Ease of operation
If the lens is pushed into the case body for mounting, then installation is simplified, but the rubber gasket may remain on the case body and drop off the lens
Solution Approach 1:
The installation process is divided into two stages: first, the lens is pushed into the case body with the stepped portion engaging with the case body's stepped structure; second, the rubber gasket is compressed to seal. This segmentation ensures the gasket remains attached to the lens during installation while maintaining sealing functionality.
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 solution allows for easier and more secure incorporation of optical elements, reducing the occurrence of unwanted light and preventing gasket drop-off, thereby simplifying the assembly process and improving image quality.
Implementation Method 1
the rubber gasket 60 sometimes drops off its arrangement space at the time that distortion of the rubber gasket 60 is restored by its elastic force
Implementation Method 2
an optical element... An optical component including: an optical element
Data Source
AI summary
An optical component includes: an optical element; a sealing member in a ring shape arranged on the optical element; a stepped portion formed on a front of a circumference surface of the optical element; and a movement-restricting portion arranged at a rear of the optical element. The stepped portion restricts a movement of the sealing member toward a front of the optical element, and the movement-restricting portion restricts a movement of the sealing member toward a rear of the optical element.