Wide-Angle Optical Layout for Distortion and Peripheral Light
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Solution Overview
Problem
Existing wide-angle optical systems face challenges in correcting negative distortion and peripheral light amount ratio, leading to reduced peripheral light efficiency and increased system size.
Innovation Solution
An optical system configuration with a front unit having negative refractive power and a rear unit having positive refractive power, utilizing aspheric lenses that satisfy specific inequalities to correct distortion and enhance peripheral light amount while minimizing system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If strong positive refractive power is used in wide-angle optical system, then focal length is reduced, but negative distortion increases and peripheral light amount decreases
Solution Approach 1:
The optical system is divided into multiple lens units with alternating positive and negative refractive powers. The front unit has negative refractive power to correct distortion, while the rear unit has positive refractive power to provide focal length, achieving segmentation of functions to resolve the contradiction between focal length and distortion.
Solution Approach 2:
Aspheric lenses are used in specific positions within the optical system to provide localized correction of distortion and peripheral light amount. The aspheric surfaces are strategically placed to address specific optical aberrations in different regions of the optical path.
2Manufacturing precision
If negative distortion is corrected, then object shape accuracy is improved, but peripheral light amount ratio decreases
Solution Approach 1:
The optical system uses aspheric lens surfaces with specifically designed curvature parameters to simultaneously correct distortion and maintain peripheral light amount. By changing the surface parameter profiles from spherical to aspheric, both distortion correction and light distribution are optimized together.
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 system effectively corrects distortion and increases peripheral light amount, maintaining a compact size by optimizing lens configurations and materials.
Implementation Method 1
a front unit having negative refractive power, an aperture stop, and a rear unit having positive refractive power. The front unit includes a plurality of aspheric lenses
Data Source
AI summary
An optical system includes, in order from an object side to an image side, a front unit having negative refractive power, an aperture stop, and a rear unit having positive refractive power. The front unit includes a plurality of aspheric lenses. A predetermined condition is satisfied.