Camera Lens Light Shading Sheet Embedded Fixation
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Solution Overview
Problem
In camera lens modules, the light shading sheet between bumpy-ridge lenses is often deflected due to unstable fixation, allowing stray light to reach the image surface and resulting in poor image quality.
Innovation Solution
The light shading sheet is embedded and fixed in the peripheral portion of the second lens, rather than being clamped between two adjacent lenses, which enhances its stability and prevents deflection, thereby reducing stray light influence and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light shading sheet is clamped between two adjacent lenses, then the structure is simple and easy to assemble, but the light shading sheet becomes deflected due to unstable fixation, allowing stray light to reach the image surface
Solution Approach 1:
The patent introduces a receiving portion structure as an intermediary element between the light shading sheet and the lenses. The receiving portion, formed on the outer peripheral surface of one of the lenses, serves as a dedicated mounting structure that provides stable fixation for the light shading sheet. This intermediary structure resolves the contradiction by offering both reliable fixation (solving the stability problem) and maintaining assembly simplicity (as the receiving portion is integrated into the lens structure during molding).
Solution Approach 2:
The patent creates a composite structure by integrating the light shading sheet with the lens through the receiving portion. The light shading sheet is fixed within the receiving portion formed on the lens outer peripheral surface, creating a composite assembly where the sheet and lens work together as a unified structure. This composite approach ensures stable fixation while maintaining the simplicity of the overall assembly process.
2Reliability
If the light shading sheet is embedded and fixed in the peripheral portion of the second lens, then the fixation stability is improved and deflection is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the lens structure by forming a distinct receiving portion on the outer peripheral surface of the lens. This receiving portion is a separate functional element that specifically accommodates the light shading sheet. By segmenting the structure in this way, the patent achieves reliable fixation without significantly increasing overall device complexity, as the receiving portion is integrated into the lens molding process rather than being a separate component.
Solution Approach 2:
The receiving portion is pre-formed on the lens during the lens molding process, before the light shading sheet is installed. This preliminary action of creating the receiving portion during lens manufacturing simplifies the overall assembly process, as the light shading sheet can be directly inserted and fixed into the pre-formed receiving portion without requiring additional complex manufacturing steps.
3Productivity
If the light shading sheet is clamped between two lenses, then the assembly process is simple, but stray light cannot be effectively blocked due to sheet deflection
Solution Approach 1:
The receiving portion acts as an intermediary structure that ensures the light shading sheet is properly positioned and fixed relative to the lens. This intermediary structure prevents sheet deflection that would otherwise allow stray light to reach the image surface, while maintaining simple assembly procedures. The receiving portion mediates between the simple assembly requirement and the need to block stray light effectively.
Data Source
AI summary
The present disclosure relates to the field of optical image technologies, and provides a camera lens module. The camera lens module includes: a lens barrel including a first barrel wall extending in a horizontal direction and a second barrel wall bent and extending from the first barrel wall; a lens module including at least a first lens and a second lens, the first lens and the second lens being received in the lens barrel sequentially from an image side to an object side; and a light shading sheet provided in the lens barrel and sandwiched between the first lens and the second lens. The second lens includes an optical portion located at a central position and a peripheral portion surrounding the optical portion, and the light shading sheet is embedded in the peripheral portion and fixed to the peripheral portion.