Optical Lens Design for Wide Viewing Angle and Aberration Control
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Solution Overview
Problem
Designing optical lenses that balance a wider viewing angle and larger aperture while minimizing aberration is challenging, particularly for projection systems where image quality is critical.
Innovation Solution
The optical lens design incorporates a first lens group with negative refractive power and four lenses, including two aspheric lenses closest to the magnified side, and a second lens group with positive refractive power and at least seven lenses, along with a reflector to optimize light path and reduce aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide viewing angle and large aperture are used in the optical lens, then the viewing angle and aperture are improved, but image aberration increases
Solution Approach 1:
The optical lens is divided into multiple lens groups (first lens group with negative refractive power and second lens group with positive refractive power), each containing multiple individual lenses. This segmentation allows independent optimization of each lens element to correct specific types of aberrations while maintaining the overall wide viewing angle and large aperture performance.
Solution Approach 2:
Different lens elements within the lens groups have different refractive powers, curvatures, and materials optimized for their specific positions and functions. The aspheric lenses specifically address marginal ray aberrations, while spherical lenses handle paraxial rays, creating local quality variations that collectively reduce overall aberration across the wide field of view.
2Object-affected harmful factors
If more lens elements are added to reduce aberration, then image quality is improved, but device complexity increases
Solution Approach 1:
Multiple lens elements are combined into two integrated lens groups with complementary refractive powers. The first lens group (negative power) and second lens group (positive power) are merged to achieve aberration correction while maintaining a relatively compact overall structure, avoiding the need for separate correction systems.
Solution Approach 2:
Each lens element within the lens groups serves multiple functions: focusing light, correcting spherical aberration, reducing coma, and controlling field curvature. The aspheric lenses simultaneously address both on-axis and off-axis aberrations, making the lens elements universally functional rather than specialized for single purposes.
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
This configuration achieves a wider viewing angle, larger aperture, and reduced aberration, such as astigmatism and lateral color, while maintaining a compact size and high image quality.
Implementation Method 1
Two lenses closest to the magnified side in the first lens group are aspheric lenses
Implementation Method 2
the reflector is disposed between the first lens group and the second lens group and configured to reflect light from the second lens group to the first lens group
Data Source
AI summary
An optical lens including a first lens group and a second lens group is provided. The first lens group is disposed between a magnified side and a reduced side and has a negative refractive power. The first lens group includes four lenses. Two lenses closest to the magnified side in the first lens group are aspheric lenses. The second lens group is disposed between the first lens group and the reduced side and has a positive refractive power. The second lens group includes at least seven lenses.