Compound Optical Imaging Lens for Chromatic Aberration Control
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Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving high image quality while balancing small size, low distortion, and cost, particularly in applications like portable electronic devices, drones, and automotive systems where temperature variations affect performance.
Innovation Solution
An optical imaging lens design comprising at least seven lenses with specific refractive powers and configurations, including compound lenses and aspheric surfaces, to minimize chromatic aberration and enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If seven lenses are arranged into an optical assembly with compound lens configuration, then chromatic aberration is reduced and image quality is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple lenses into compound lens structures where lenses are closely spaced or cemented together. Specifically, the fourth lens and fifth lens form a compound lens, as do the sixth and seventh lenses, and the first and second lenses. This merging approach corrects chromatic aberration by using different glass types with complementary dispersion properties, achieving high image quality while managing the complexity through integrated design.
Solution Approach 2:
The patent employs composite material principles by using different glass types for adjacent lenses within compound lens structures. The fourth and fifth lenses use glass types with different Abbe numbers to correct chromatic aberration, creating a composite optical system that leverages the complementary properties of different materials to achieve superior color correction and image quality.
2Manufacturing precision
If multiple lenses with specific refractive powers are used to reduce chromatic aberration, then color accuracy is improved, but the lens size increases
Solution Approach 1:
The patent applies local quality by assigning specific refractive power ranges and glass type characteristics to particular lens positions within the assembly. The fourth and fifth lenses, which form a compound structure, are specifically designed with different Abbe numbers to target chromatic aberration correction in the mid-to-rear optical path, while other lenses handle different aspects of image formation, optimizing color accuracy locally where it is most needed.
Solution Approach 2:
The patent utilizes parameter changes by carefully selecting refractive powers and Abbe numbers for each lens to control chromatic aberration. The fourth lens has positive refractive power with one Abbe number range, while the fifth lens has negative refractive power with a different Abbe number range, creating a parameter-based correction system that reduces color fringing without requiring excessive lens volume.
3Manufacturing precision
If a seven-lens configuration with compound lenses is implemented, then distortion is reduced and imaging performance is enhanced, but manufacturing cost increases
Solution Approach 1:
The patent merges adjacent lenses into compound structures (first and second lenses, fourth and fifth lenses, sixth and seventh lenses) to achieve chromatic aberration correction and improved imaging performance. This merging reduces the total number of individual optical elements that need to be manufactured and assembled separately, potentially lowering manufacturing costs while maintaining high imaging quality through integrated design approaches.
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 lens design significantly reduces chromatic aberration, ensuring high image quality and color accuracy across various wavelengths, with improved performance in diverse environmental conditions.
Implementation Method 1
An image-side surface of the second lens and an object-side surface of the third lens are adhered to form a compound lens. The optical imaging lens includes a compound lens, which could significantly reduce the chromatic aberration of the lens.
Implementation Method 2
arranging at least seven lenses into an optical assembly for the optical imaging lens. The arrangement of the refractive powers and the conditions of the optical imaging lens of the present invention could achieve the effect of high image quality.
Data Source
AI summary
An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first lens assembly, an aperture, and a second lens assembly. The first lens assembly consists of, in order from the object side to the image side along the optical axis, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having positive refractive power, and a fourth lens having positive refractive power. An image-side surface of the second lens and an object-side surface of the third lens are adhered to form a compound lens. The second lens assembly consists of, in order from the object side to the image side along the optical axis, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power.