V Groove Lens Array Plate Ghost Noise Reduction
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Solution Overview
Problem
Erecting equal-magnification lens array plates in image reading devices suffer from ghost noise due to diagonally incident rays entering adjacent lenses, which is not effectively addressed by existing solutions that use light-shielding walls, as they increase manufacturing costs.
Innovation Solution
The solution involves forming V grooves on the surfaces of the lens array plates between adjacent lenses, which deflect and absorb or attenuate stray light, reducing ghost noise without the need for intermediate light-shielding walls, thereby maintaining cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-shielding wall is provided between two lens array plates to reduce ghost noise, then ghost noise is reduced, but the number of components increases and manufacturing cost increases
Solution Approach 1:
The light-shielding function is merged into the lens array plate structure itself by forming V grooves on the plate surfaces. The V grooves act as light-shielding elements that prevent diagonal rays from entering adjacent lenses, eliminating the need for separate light-shielding walls between lens array plates. This integration reduces component count while maintaining ghost noise reduction functionality.
Solution Approach 2:
The V grooves are formed locally in specific regions of the lens array plate where light-shielding is needed. By positioning V grooves between adjacent lenses on the plate surfaces, the solution provides targeted light-shielding functionality only where required, rather than using a complete light-shielding wall structure. This local approach reduces material usage and manufacturing complexity.
2Object-affected harmful factors
If a light-shielding wall is provided between two lens array plates to reduce ghost noise, then ghost noise is reduced, but manufacturing cost increases
Solution Approach 1:
The light-shielding function is merged into the lens array plate structure itself by forming V grooves on the plate surfaces. The V grooves act as light-shielding elements that prevent diagonal rays from entering adjacent lenses, eliminating the need for separate light-shielding walls between lens array plates. This integration reduces component count while maintaining ghost noise reduction functionality.
Solution Approach 2:
The lens array plate structure itself provides the light-shielding function through the V grooves formed on its surfaces. The V grooves are integrated directly into the plate during manufacturing, allowing the plate to serve both optical and light-shielding functions simultaneously. This self-service approach eliminates the need for additional light-shielding components and reduces manufacturing cost.
3Object-affected harmful factors
If V grooves are formed in the area between adjacent lenses to reduce ghost noise, then ghost noise is reduced without light-shielding walls, but the structure becomes more complex
Solution Approach 1:
The V grooves are formed locally in specific regions of the lens array plate where light-shielding is needed. By positioning V grooves between adjacent lenses on the plate surfaces, the solution provides targeted light-shielding functionality only where required, rather than using a complete light-shielding wall structure. This local approach reduces material usage and manufacturing complexity.
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
This configuration effectively reduces ghost noise by deflecting stray light away from the image sensor, improving image quality without increasing component count or manufacturing costs.
Implementation Method 1
a plurality of V grooves are formed in an area between adjacent second lenses on the second surface and/or an area between adjacent third lenses on the third surface
Implementation Method 2
The V grooves may be formed to extend substantially parallel to the main scanning direction of the erecting equal-magnification lens array plate
Data Source
AI summary
An erecting equal-magnification lens array plate includes: a first lens array plate provided with a plurality of first lenses systematically arranged on a first surface and a plurality of second lenses systematically arranged on a second surface opposite to the first surface; and a second lens array plate provided with a plurality of third lenses systematically arranged on a third surface and a plurality of fourth lenses systematically arranged on a fourth surface opposite to the third surface. The first lens array plate and the second lens array plate form a stack such that the second surface and the third surface face each other to ensure that a combination of the lenses aligned with each other form a coaxial lens system. A plurality of V grooves are formed in an area between adjacent second lenses on the second surface in the erecting equal-magnification lens array plate.