Multi-Lens Light-Blocking Structure to Cut Stray Light and Molding Failures
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Solution Overview
Problem
The reduction in thickness of light-blocking bodies during resin molding to improve lens performance leads to increased molding failures and higher manufacturing costs.
Innovation Solution
An optical device with a lens body and a light-blocking body where light-transmitting and light-blocking portions are alternately arranged, reducing the influence on lens performance and minimizing molding failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the light-blocking body is reduced to improve lens performance, then the lens performance is improved, but the molding failure rate increases
Solution Approach 1:
The light-blocking body is segmented into multiple independent light-blocking elements corresponding to each lens. Each element can be manufactured separately with adequate thickness, avoiding the molding failures associated with thin integrated structures while maintaining optical performance.
Solution Approach 2:
The patent transitions from a planar light-blocking mask to a three-dimensional light-blocking body with substantial thickness. This dimensional change allows for robust manufacturing while maintaining the light-blocking function, as the thickness provides structural integrity without compromising optical performance.
2Reliability
If the thickness of the light-blocking body is reduced to improve lens performance, then the lens performance is improved, but the manufacturing cost cannot be easily reduced
Solution Approach 1:
By dividing the light-blocking body into separate elements, each can be manufactured using standard molding processes with optimal thickness, reducing waste and rework costs associated with molding failures while maintaining lens performance.
Solution Approach 2:
The patent uses multiple identical light-blocking elements that can be manufactured using the same molding process and assembly method, enabling economies of scale and standardized production that reduce overall manufacturing cost despite the increased thickness.
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
Improves lens performance by reducing stray light and manufacturing costs through a structured light-blocking design that alternates light-transmitting and blocking portions.
Implementation Method 1
a light-blocking body disposed on a light incident side of the lens body and including light-transmitting portions that transmit light and light-blocking portions that block light
Data Source
AI summary
An optical device includes: a lens body including plural lenses arranged such that optical axes of the plural lenses extend along each other; and a light-blocking body disposed on a light incident side of the lens body and including light-transmitting portions that transmit light and light-blocking portions that block light, the light-transmitting portions and the light-blocking portions being continuously arranged in an alternating manner such that the light-transmitting portions are positioned at the plural lenses and that the light-blocking portions are positioned between the plural lenses.