Optical Composition Suppressing Crystallization via Cyclic Carbonate
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Solution Overview
Problem
Conventional optical materials with specific dispersion characteristics for reducing chromatic aberration have limited molecular structures, leading to crystallization issues and non-uniformities when used in optical compositions, which affect their optical design and storage stability.
Innovation Solution
An optical composition comprising specific (meth)acrylate compounds with defined structural formulas, where one compound has a high secondary dispersion characteristic and the other has a branched structure, is used to create a cured product with improved refractive index dispersion characteristics and suppressed crystallization, enhancing optical design flexibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic materials with specific dispersion characteristics (high θg,F) are used to reduce chromatic aberration, then chromatic aberration-correcting function is improved, but the materials are liable to crystallize and form nonuniform portions
Solution Approach 1:
The patent combines a sulfone (meth)acrylate compound (Formula 1) with a cyclic carbonate (meth)acrylate compound (Formula 2) to create a composite optical composition. The cyclic carbonate compound acts as a crystallization inhibitor that prevents the sulfone compound from forming crystals and nonuniform portions, while maintaining the high secondary dispersion characteristic (θg,F) needed for chromatic aberration correction. This composite approach allows both improved reliability and stability.
Solution Approach 2:
The cyclic carbonate (meth)acrylate compound serves as an intermediary substance that mediates between the high-performance sulfone compound and the requirement for storage stability. It interferes with the crystallization process of the sulfone compound without significantly compromising the optical dispersion characteristics, thus enabling stable storage while maintaining chromatic aberration-correcting function.
2Stability of the object's composition
If conventional organic materials are used, then storage stability is maintained, but the secondary dispersion characteristic (θg,F) is limited to 0.700 or less
Solution Approach 1:
The patent changes the chemical composition parameters by introducing a specific ratio of cyclic carbonate (meth)acrylate compound (1-10 mass%) to sulfone (meth)acrylate compound. This parameter change enables the system to achieve θg,F > 0.700 while maintaining storage stability, overcoming the limitation of conventional materials.
3Device complexity
If the number of lenses and constructions are limited, then device complexity is reduced, but it becomes extremely difficult to sufficiently correct chromatic aberration
Solution Approach 1:
The patent changes the optical material parameter (secondary dispersion characteristic θg,F) to achieve abnormal dispersion characteristics. This allows a single lens or simplified lens construction to correct chromatic aberration effectively, reducing the number of lenses needed while maintaining correction performance.
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 composition achieves high refractive index dispersion characteristics and suppresses crystallization, improving the optical element's chromatic aberration-correcting function and storage stability without altering optical design, making it suitable for complex lens systems like camera lenses.
Implementation Method 1
An optical composition containing at least a compound represented by general formula (1) and a compound represented by general formula (2), wherein a content of the compound represented by general formula (2) in the optical composition is 1.0 mass % or more and 10.0 mass % or less with respect to the compound represented by general formula (1)
Data Source
AI summary
Provided is a cured product having the following characteristics: the dispersion characteristic and secondary dispersion characteristic of refractive indices are high, the cured product hardy crystallizes, and a chromatic aberration-correcting function is high. The cured product contains at least a structure represented by the general formula (4) and a structure represented by the general formula (5), in which a content of the structure represented by the general formula (5) in the cured product is 0.01 or more and 0.10 or less in terms of a substance amount ratio with respect to the structure represented by the general formula (4).