Optical Glass Composition for Lightweight Aberration Correction
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Solution Overview
Problem
Existing optical glasses with high dispersion tend to have increased specific gravity and decreased transmittance, making it challenging to achieve a lightweight lens with improved aberration correction.
Innovation Solution
The development of an optical glass composition that includes specific mass percentages of P2O5, Al2O3, TiO2, Nb2O5, Ta2O5, Bi2O3, Sb2O3, and BaO, which balances dispersibility, specific gravity, and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical glass with high dispersion is used to correct aberrations, then aberration correction is improved, but specific gravity increases making the lens heavier
Solution Approach 1:
The patent changes the chemical composition parameters of the optical glass by incorporating specific combinations of P2O5 (30-60 mass%), TiO2 (10-36 mass%), and other metal oxides in controlled amounts. This composition optimization achieves high dispersion (Abbe number 20-35) while controlling specific gravity (2.8-3.5), thereby correcting aberrations without excessive weight gain.
Solution Approach 2:
The patent creates a composite optical glass material by combining multiple metal oxide components (P2O5, TiO2, Nb2O5, Ta2O5, Bi2O3, Sb2O3, BaO, and other optional oxides) in specific proportions. This composite approach allows the material to achieve superior dispersion properties while maintaining lower specific gravity compared to conventional high-dispersion glasses.
2Reliability
If optical glass with high dispersion is used to correct aberrations, then aberration correction is improved, but transmittance decreases
Solution Approach 1:
The patent optimizes the concentration parameters of metal oxide components to balance dispersion and transmittance. By controlling TiO2 content (10-36 mass%) and P2O5 content (30-60 mass%) along with other oxides, the glass achieves high dispersion while maintaining adequate transmittance through precise compositional parameter adjustment.
Solution Approach 2:
The patent applies local quality by selectively incorporating specific metal oxide components in controlled amounts to achieve high dispersion in certain wavelength ranges while minimizing absorption losses. The composition is tailored to provide optimal optical properties at different wavelengths, balancing aberration correction with light transmission.
3Reliability
If optical glass with high dispersion is used to correct aberrations, then aberration correction is improved, but specific gravity increases
Solution Approach 1:
The patent changes the compositional parameters by incorporating lightweight high-dispersion components such as P2O5 (30-60 mass%) and TiO2 (10-36 mass%) while limiting the content of heavy metal oxides. This parameter optimization achieves Abbe number 20-35 with specific gravity controlled at 2.8-3.5, correcting the trade-off between dispersion and weight.
Solution Approach 2:
The patent develops a composite glass material combining multiple oxide components with different density and dispersion characteristics. By integrating P2O5, TiO2, Nb2O5, Ta2O5, Bi2O3, Sb2O3, and BaO in specific ratios, the material achieves high dispersion properties while maintaining lower specific gravity compared to traditional high-dispersion optical glasses.
Data Source
AI summary
An optical glass contains: a P2O5 component of 30 to 60 mass % (exclusive of 30); an Al2O3 component of 2 to 10 mass % (exclusive of 2); a TiO2 component of 10 to 36 mass % (exclusive of 36); an Nb2O5 component of 0 to 5 mass %; a Ta2O5 component of 0 to 15 mass %; a Bi2O3 component of 0 to 5 mass % (exclusive of 5); and an Sb2O3 component of 0 to 1 mass %; and a BaO component of 1 to 20 mass %.