Transparent Polyamide Optical Lens Stabilizer
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Solution Overview
Problem
Optical lenses made of transparent polyamides are prone to discoloration, deformation, and aging when exposed to light from xenon lamps or blue-violet lasers, and their surfaces can turn white during cleaning with organic solvents, leading to deterioration.
Innovation Solution
The development of an optical lens using a molded body made of transparent polyamide with a stabilizer, combined with a transparent coating film of inorganic compounds, which maintains high light transmittance and resistance to heat and solvents, ensuring the lens remains resistant to discoloration and deformation even after prolonged light exposure and solvent cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an optical lens is made of transparent polyamide to achieve heat resistance and UV resistance, then heat resistance is improved, but the lens becomes prone to discoloration and deformation under intense light irradiation from xenon lamps or blue-violet lasers
Solution Approach 1:
The patent combines transparent polyamide with specific stabilizers (hindered amine light stabilizers in 0.01-5 parts by weight per 100 parts polyamide, and phosphorous-based stabilizers in 0.01-5 parts by weight per 100 parts polyamide) to create a composite material that maintains heat resistance while adding resistance to discoloration and deformation under intense light irradiation from xenon lamps or blue-violet lasers
2Ease of manufacture
If the surface of the optical lens is cleaned with organic solvents to remove manufacturing residues, then cleaning effectiveness is improved, but the lens surface turns white and deteriorates
Solution Approach 1:
The patent applies a sacrificial protective coating on the lens surface that can be easily removed after cleaning. The coating formulation includes specific resins and additives that provide temporary protection during manufacturing and cleaning processes, then can be cleanly removed without damaging the underlying lens surface
Solution Approach 2:
The patent uses a protective coating as an intermediary layer between the organic solvent and the lens surface. This coating layer absorbs the harmful effects of the solvent, preventing direct contact and damage to the lens surface, while still allowing effective cleaning to occur
3Quantity of substance
If the lens material is made transparent to allow high light transmittance, then optical performance is improved, but the material becomes more susceptible to light-induced degradation
Solution Approach 1:
The patent modifies the chemical composition parameters of the transparent polyamide by incorporating specific stabilizers in controlled amounts. This changes the material's chemical resistance parameters while maintaining its optical transparency, allowing it to withstand intense light irradiation without degradation
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
The optical lens achieves high transparency and resistance to discoloration, deformation, and surface deterioration, maintaining at least 50% total light transmittance after 500 hours of xenon lamp irradiation and resisting surface whitening during solvent cleaning, making it suitable for use in light-emitting devices and lasers.
Implementation Method 1
an optical lens resistant to discoloration, deformation, aging, and the like due to light irradiation is obtained even when a xenon lamp or the like is used as a light source, by forming the lens from a transparent resin molded body made of a molding material containing a transparent polyamide and a stabilizer
Implementation Method 2
an optical lens resistant to deterioration such as turning to white of its surface even after surface cleaning with an organic solvent is conducted, by forming a transparent coating film made of an inorganic compound on the surface of the optical lens
Implementation Method 3
a molded body made of a molding material containing a transparent polyamide and a stabilizer, the optical lens having total light transmittance of at least 60% when the molded body has a thickness of 2 mm, and having the total light transmittance of at least 50% after the molded body maintained at 80° C. was irradiated with light
Data Source
AI summary
An optical lens made of resin, which includes a molded body made of a molding material containing a transparent polyamide such as polyamide 12 and a stabilizer, which has total light transmittance of at least 60% when the molded body has a thickness of 2 mm, and has total light transmittance of at least 50% after the molded body maintained at 80° C. was irradiated with light in an amount of 1000 W/m2 for 500 hours by using a xenon lamp, which is lightweight, highly transparent, and resistant to discoloration, deformation, aging, and the like due to irradiation with light emitted from a xenon lamp, a blue-violet laser or the like serving as a light source, and which is suitable for use in a light emitting device of a flash lamp and the like, is provided.