Erecting Equal-Magnification Lens Array Plate Flare Noise Reduction
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Solution Overview
Problem
Erecting equal-magnification lens array plates in image reading devices suffer from flare noise due to light reflection from light shielding walls, which is not effectively addressed by existing solutions.
Innovation Solution
The design incorporates a stack of lens array plates with coaxial lenses and light shielding walls forming apertures with larger diameters facing the lenses, reducing flare noise by absorbing stray light before it reaches the image plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shielding wall is provided on the surface of the erecting equal-magnification lens array plate to remove stray light, then stray light is reduced, but light reflected by the light shielding wall produces flare noise
Solution Approach 1:
The patent converts the harmful reflection from light shielding walls into beneficial absorption by positioning light absorbing materials at strategic locations where reflected light would otherwise cause flare noise. The reflection that was previously harmful is now directed toward absorbing materials that convert it into harmless heat energy.
Solution Approach 2:
The patent introduces light absorbing materials as intermediary elements between the light shielding walls and the image plane. These intermediary materials intercept and absorb the reflected light before it can reach the image plane and cause flare noise, acting as a mediator that resolves the conflict between stray light removal and flare noise prevention.
2Quantity of substance
If multiple columns of rod lenses are used in a rod lens array to improve light transmission proportion and reduce unevenness, then light transmission is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the lens array into multiple independent lens elements arranged in columns, allowing each lens to be manufactured separately and then assembled into the final array. This segmentation enables flexible configuration where multiple columns can be used to improve light transmission while maintaining manufacturing feasibility through modular assembly.
Solution Approach 2:
The patent changes the structural parameters of the lens array by increasing the number of columns from one or two to multiple columns. This parameter change improves light transmission proportion and reduces unevenness in the amount of light transmitted, while the modular nature of the design keeps manufacturing costs manageable.
3Ease of manufacture
If an erecting equal-magnification lens array plate is formed as a stack of transparent lens array plates with coaxial convex lenses to enable injection molding, then manufacturing cost is reduced, but stray light enters adjacent convex lenses creating noise
Solution Approach 1:
The patent extracts and removes the harmful stray light paths from the optical system by introducing light shielding structures and light absorbing materials. These elements selectively remove diagonally incident stray light that would otherwise enter adjacent convex lenses and create noise, while preserving the beneficial injection molding manufacturing process.
Solution Approach 2:
The patent introduces light shielding walls and light absorbing materials as intermediary elements between adjacent convex lenses. These intermediaries prevent stray light from one lens from entering adjacent lenses, thereby eliminating noise while maintaining the cost-effective stacked lens array plate structure.
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 significantly reduces flare noise, enabling the production of high-quality erect equal-magnification images by minimizing light reflection and ghosting effects.
Implementation Method 1
a light shielding wall provided upright to surround the first lens; a second light shielding wall provided upright to surround the fourth lens
Implementation Method 2
each transparent lens array plate includes a systematic arrangement of micro-convex lenses on one or both surfaces of the plate
Data Source
AI summary
An erecting equal-magnification lens array plate includes a stack of a first lens array plate and a second lens array plate, the first lens array plate being provided with a plurality of first lenses and a plurality of second lenses, and the second lens array plate being provided with a plurality of third lenses and a plurality of fourth lenses. The erecting equal-magnification lens array plate includes a first light shielding wall provided upright to surround the first lens, a second light shielding wall provided upright to surround the fourth lens, a first aperture defined by the first light shielding wall and formed above the first lens, and a second aperture defined by the second light shielding well and formed above the fourth lens. At least one of the first aperture and the second aperture is formed such that the aperture diameter ID facing the lens is larger than the aperture diameter OD on the opposite side.