Planar Light Shielding Sheet Positioning in Image Capturing Systems
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Solution Overview
Problem
Conventional image capturing systems face challenges in maintaining image quality due to improper positioning of light shielding sheets, which can lead to deformation and reduced image quality, and require additional components that occupy space, making the system less compact.
Innovation Solution
An image capturing system with a barrel, lens assembly, and a planar light shielding sheet that uses an annular groove in a space maintaining member to adjust and limit the position of the light shielding sheet, preventing deformation and maintaining image quality while keeping the system compact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lens elements are used to squeeze the light shielding sheet for positioning, then the light shielding sheet can be positioned, but the light shielding sheet becomes deformed and image quality deteriorates
Solution Approach 1:
The patent introduces a light shielding member as an intermediary component between the lens elements and the light shielding sheet. This light shielding member includes a groove that receives and positions the light shielding sheet, preventing direct contact and squeezing between lens elements and the sheet. The intermediary structure maintains both positioning precision and the flatness of the light shielding sheet.
2Manufacturing precision
If an additional member is added to regulate the light shielding sheet, then the light shielding sheet can be positioned properly, but the image capturing system becomes less compact
Solution Approach 1:
The patent merges the light shielding member with the space maintaining member into a single integrated component. The light shielding member includes both the groove for positioning the light shielding sheet and the space maintaining function. This merging eliminates the need for separate additional members, maintaining positioning precision while preserving system compactness.
Solution Approach 2:
The light shielding member performs multiple functions: it positions the light shielding sheet through its groove, maintains spacing between optical components, and prevents stray light. By making this component multi-functional, the patent avoids adding separate dedicated members, thus maintaining system compactness while achieving proper positioning.
3Device complexity
If the light shielding sheet is made thinner to maintain compactness, then the system remains compact, but the light shielding sheet becomes more susceptible to deformation
Solution Approach 1:
The light shielding member acts as a protective intermediary that prevents direct mechanical contact between lens elements and the thin light shielding sheet. The groove structure provides support and positioning without requiring the sheet to be thick, thus maintaining system compactness while preventing deformation of the thin sheet.
Data Source
AI summary
An image capturing system includes a barrel, a lens assembly, at least one planar light shielding sheet and at least one space maintaining member. The lens assembly includes lens elements disposed in the barrel. The planar light shielding sheet has an aperture for light to travel through. The space maintaining member is disposed in the barrel for adjusting a relative position of two of the lens elements. The space maintaining member includes a regulating portion, and the regulating portion includes an annular groove. The planar light shielding sheet is assembled to the annular groove, and the regulating portion is for adjusting and limiting a position of the planar light shielding sheet. A thickness of the planar light shielding sheet is smaller than a width of the annular groove.