Optical Organic Compound for Chromatic Aberration Correction

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Solution Overview

Problem

Current optical materials, particularly organic resins, have limited secondary dispersion characteristics (θg,F) and chromatic aberration correction capabilities, making it difficult to achieve high performance in optical systems, especially when combined with glass materials.

Innovation Solution

Development of an optical organic material compound with a specific (meth)acrylate structure that enhances refractive index dispersion characteristics, including high Abbe number (νd) and secondary dispersion characteristic (θg,F), allowing for efficient chromatic aberration correction in optical elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional organic resin materials are used for optical elements, then mass-productivity and moldability are improved, but chromatic aberration correction capability deteriorates due to limited secondary dispersion characteristics

Engineering Contradiction:

Improvemass-productivityVSAvoidchromatic aberration correction capability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the organic resin by incorporating specific compounds (carbazole derivatives, compounds with θg,F > 0.700) to achieve anomalous dispersion characteristics while maintaining moldability and mass-productivity of organic resin optical elements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite optical material system by combining conventional organic resin base materials with specially selected carbazole derivative compounds and other additives to achieve both high productivity and superior chromatic aberration correction

Inventive Principle:

Principle #40Composite materials

2Reliability

If glass materials are used for optical elements, then chromatic aberration correction is improved, but weight and manufacturing complexity increase

Engineering Contradiction:

Improvechromatic aberration correctionVSAvoidweight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The patent changes the dispersion characteristics parameter (θg,F) of organic resin materials to exceed 0.700, enabling them to achieve chromatic aberration correction performance previously only attainable with glass materials, while maintaining the weight advantage of organic resins

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the number of lens elements is increased to correct chromatic aberration, then chromatic aberration correction is improved, but device complexity and size increase

Engineering Contradiction:

Improvechromatic aberration correctionVSAvoidnumber of lens elements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the material property parameters (refractive index dispersion characteristics, θg,F) to enable effective chromatic aberration correction with fewer lens elements, thereby reducing overall system complexity and size

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSRE47556E1Optical element compound, optical material, and optical element

Publication Date: 2019.08.06 CANON KK

AI summary

An optical material organic compound having characteristics that the dispersion characteristic (Abbe number (νd)) and the secondary dispersion characteristic (θg,F) of the refractive index are high, the transmittance in the visible light region is high, and the chromatic aberration correction function delivers high performance, which represented by the general formula (1) or (2) is provided.