Optical Component UV Light Shielding Adhesive Protection
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Solution Overview
Problem
Conventional optical components face durability issues due to ultraviolet light exposure, which degrades organic-based adhesive agents, leading to increased manufacturing costs when using specialized adhesive mixtures to mitigate this problem.
Innovation Solution
The optical component design incorporates a structure where ultraviolet light is not guided to the adhesive layer, using an inexpensive organic-based adhesive agent by employing a transparent body with a specific height relationship and light-shielding sections to prevent direct UV exposure, and optionally using a non-transmissive material on the adhesive surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an organic-based adhesive agent is used to join the package main body and lid member, then manufacturing cost is reduced, but the adhesive agent deteriorates due to ultraviolet light exposure, reducing durability
Solution Approach 1:
A light-shielding layer is introduced as an intermediary component between the optical element and the adhesive agent. This layer blocks ultraviolet light from reaching the adhesive, preventing deterioration while allowing the use of cost-effective organic-based adhesives. The light-shielding layer acts as a mediator that protects the adhesive from harmful radiation without interfering with the bonding function.
Solution Approach 2:
The package structure is segmented into distinct functional zones: an upper light-shielding region containing the optical element, a middle light-shielding layer protecting the adhesive, and a lower transparent region for light extraction. This segmentation allows each layer to perform its specific function optimally while protecting the adhesive from UV exposure.
2Reliability
If a light-shielding structure is added to prevent UV exposure to the adhesive, then durability is improved, but device complexity increases
Solution Approach 1:
The light-shielding layer is merged with existing package components rather than being added as a completely separate element. The reflective plate or lower portion of the package main body serves dual functions as both a structural component and a light-shielding element. This merging approach provides UV protection while minimizing increases in device complexity.
Solution Approach 2:
Existing package components are designed to serve multiple functions: the reflective plate provides both optical reflection for light extraction and UV shielding for adhesive protection. The lower portion of the package main body simultaneously serves as a structural support and a light-shielding barrier. This multi-functionality reduces the need for additional dedicated light-shielding components.
3Reliability
If the transparent body height is increased to prevent light leakage, then optical performance is improved, but the amount of ultraviolet light reaching the adhesive through the transparent body increases
Solution Approach 1:
The ultraviolet light that would otherwise cause harm to the adhesive is converted into a beneficial reflection by the light-shielding layer. The reflective plate redirects UV light away from the adhesive, transforming a harmful factor into an opportunity for improved adhesive protection while maintaining optical performance through the transparent body.
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 design enhances the durability of the optical component package while reducing costs by avoiding UV exposure to the adhesive agent and minimizing light leakage, thereby improving performance.
Implementation Method 1
a light-shielding section disposed in the housing space; the light-shielding section blocks ultraviolet light from reaching the adhesive layer
Implementation Method 2
the package having a structure in which the ultraviolet light is not guided to the adhesive layer through the transparent body
Implementation Method 3
at least one optical element configured to emit ultraviolet light; ultraviolet light 114 from the optical element 104, in addition to including a light component emitted forward toward the lid member 110, includes a light component emitted toward the above-described joining portion
Data Source
AI summary
The present invention relates to an optical component and a transparent body used in the optical component. The optical component includes at least one optical element that radiates ultraviolet light, and a package that accommodates the optical element. The package includes a mounting substrate on which the optical element is mounted, and a transparent body that is bonded to the mounting substrate with an organic-based adhesive layer therebetween. The package has a structure in which the ultraviolet light is transmitted through the transparent body but not guided to the adhesive layer, and the ultraviolet light does not directly come into contact with the adhesive layer.