Resin Adhesive for Cemented Lens Chromatic Aberration
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Solution Overview
Problem
Existing optical systems, particularly cemented lenses, face challenges in effectively correcting chromatic aberration due to limitations in refractive index dispersion, which can be difficult to address with conventional materials and configurations.
Innovation Solution
A novel compound is introduced, expressed in Formula (1), which is used to create a resin precursor that, when combined with specific curable compositions, forms a cured product with improved refractive index dispersion characteristics, enabling excellent chromatic aberration correction in multilayered optical elements like cemented lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional resin adhesive materials are used in cemented lenses, then the lens structure can be simplified, but chromatic aberration correction is insufficient due to limited refractive index dispersion
Solution Approach 1:
The patent changes the chemical composition parameters of the resin adhesive material by incorporating specific compounds (Formula 1 and Formula 2) with controlled ratios of functional groups, achieving a θgF value of 0.60 or higher. This parameter change enables the resin to provide adequate chromatic aberration correction while maintaining the simplified cemented lens structure.
Solution Approach 2:
The patent creates a composite resin adhesive material by combining multiple compounds with different functional groups (carboxyl, hydroxyl, amino, or isocyanate groups) in specific proportions. This composite approach allows the material to achieve both the required mechanical bonding properties and the optical dispersion characteristics (θgF ≥ 0.60) necessary for chromatic aberration correction.
2Ease of manufacture
If resin adhesive layer is used to bond lens elements, then assembly is simplified, but chromatic aberration correction is compromised due to material limitations
Solution Approach 1:
The patent modifies the chemical parameters of the resin adhesive by specifying compounds with particular functional groups and molecular structures that achieve θgF ≥ 0.60. This enables the resin to correct chromatic aberration effectively while maintaining the ease of manufacturing benefits of using a resin adhesive layer instead of complex multi-element designs.
Solution Approach 2:
The patent replicates the optical properties of traditional glass cementing materials through a synthetic resin composition, achieving similar or superior chromatic aberration correction (θgF ≥ 0.60) while retaining the manufacturing advantages of resin-based assembly processes.
3Manufacturing precision
If high θgF value material is used for chromatic aberration correction, then optical performance improves, but material selection and formulation become more complex
Solution Approach 1:
The patent establishes specific parameter ranges for the resin formulation (θgF ≥ 0.60, controlled functional group ratios) that can be achieved through systematic variation of compound proportions. This provides a clear formulation guideline that balances optical performance with manageable material complexity.
Solution Approach 2:
The patent introduces specific functional groups (carboxyl, hydroxyl, amino, or isocyanate) at controlled proportions within the resin molecule structure. This local functionalization approach enables the material to achieve the required θgF value and chromatic aberration correction while maintaining a relatively simple overall formulation framework.
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 solution provides a high θgF value and unique dispersion characteristics, effectively correcting chromatic aberration and maintaining high transparency and stability, even in complex optical systems such as interchangeable lenses for cameras and multi-photon microscopes.
Implementation Method 1
a curable composition including a compound represented by general formula (1), a compound represented by general formula (2), and a photopolymerization initiator or a polymerization catalyst
Implementation Method 2
a curable composition including a compound represented by general formula (1), a compound represented by general formula (2), and a photopolymerization initiator or a polymerization catalyst
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A compound expressed in the following formula (1) (where R1 and R2 independently denote a hydrogen atom or a methyl group, Y1 and Y2 independently denote an alkylene group having a carbon number of 1 to 9, and n1 and n2 independently denote an integer of 0 to 3).