Filter Unit Elastic Adhesion Film Prevents Lens Distortion
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Solution Overview
Problem
Conventional filter units for imaging devices experience distortion due to pressure contact between the filter frame and filter body, which can lead to image deterioration, especially with high-resolution solid-state image sensing devices, and existing adhesive solutions either increase manufacturing costs or fail to prevent distortion effectively.
Innovation Solution
A filter unit design featuring a discoidal or polygonal filter body with an elastic adhesion film between the filter body and frame, where the filter body is in noncontact with the frame, and the adhesion film is hidden under the filter unit's appearance, using a black elastic adhesive and a decorative frame for sealing and light prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the filter frame and filter body are in pressure contact to fix the filter body, then the filter unit structure is simple and manufacturing is easy, but distortion occurs on the filter body surface causing image deterioration
Solution Approach 1:
An elastic adhesive layer is introduced as an intermediary between the filter frame and filter body. This adhesive layer serves as a mediator that bonds the two components while accommodating dimensional differences and preventing direct pressure contact, thereby eliminating surface distortion while maintaining structural integrity
Solution Approach 2:
The elastic adhesive layer changes the mechanical parameters of the connection interface by providing elasticity and compliance. This allows the filter body to maintain its original shape without rigid pressure contact, while still achieving secure fixation through the adhesive bonding mechanism
2Manufacturing precision
If elastic adhesive is applied to fix the filter body to the filter frame, then distortion is prevented, but adhesive extrusion occurs increasing manufacturing complexity and cost
Solution Approach 1:
The elastic adhesive is applied as a thin film layer between the filter frame and filter body. This thin film configuration prevents excessive adhesive extrusion while maintaining effective bonding, and the film can be neatly contained within the recessed portion of the filter frame
Solution Approach 2:
The elastic adhesive film acts as a controlled intermediary that is contained within the filter frame structure, preventing extrusion beyond the designated area and simplifying the manufacturing process by eliminating the need for additional adhesive management steps
3Device complexity
If the filter body is directly attached to the filter frame without intermediate structures, then the device structure is simple, but distortion occurs causing image quality deterioration
Solution Approach 1:
The elastic adhesive layer serves as an intermediary that resolves the conflict between structural simplicity and manufacturing precision. It provides a bonding interface that prevents distortion while maintaining overall structural compactness
Solution Approach 2:
The elastic adhesive is applied locally at the bonding interface between the filter frame and filter body, providing targeted compliance and distortion prevention only where needed, while the rest of the structure maintains its original simple configuration
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 prevents distortion, maintains high-definition image quality, reduces manufacturing costs, and provides a waterproof effect without adverse effects from the adhesion film, allowing for easier replacement of damaged components.
Implementation Method 1
an adhesion film that is formed between the filter frame and the filter body and that is formed of an elastic adhesive
Data Source
AI summary
A filter unit that is used by being detachably mounted on a lens barrel constituting an imaging device is configured so as to include a discoidal filter body, an annular filter frame that receives the filter body, an adhesion film that is formed between the filter frame and the filter body and that is formed of an elastic adhesion, and a decorative annular frame received at a portion that is inside the filter frame and that is, when mounted on the lens barrel, on the imaging object side with respect to the filter body. The filter body and the filter frame are in noncontact with each other by forming the adhesion film between the filter frame and the filter body, and by disposing the decorative annular frame, the adhesion film is hidden under the appearance of the filter unit when the filter unit is mounted on the lens barrel.