Imaging Optical System Aberration Correction Lens Count
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection display devices require a large number of lenses to achieve aberration correction, which increases costs and is not suitable for narrow indoor spaces, and there is a demand for a wider angle imaging optical system with reduced lens count.
Innovation Solution
An imaging optical system comprising a first and second optical system with specific lens configurations, including A and B lens groups with strategically placed negative and positive lenses, optimized to minimize the number of lenses while maintaining high optical performance by satisfying conditional expressions for focal lengths and refractive powers, allowing for aberration correction and wide-angle projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of lenses are used to achieve aberration correction, then optical performance is improved, but device complexity and cost increase
Solution Approach 1:
The optical system is divided into two distinct optical systems (first optical system for magnification and second optical system for reduction) with specific lens group configurations. Each optical system contains strategically placed negative and positive lens groups that work together to correct aberrations independently, reducing the total lens count while maintaining optical performance
Solution Approach 2:
The patent applies specific conditional expressions that define parameter ranges for focal lengths (fn1B/|f|, fn2A/|f|, fn2B/|f|) and lens group configurations. By optimizing these parameters within defined ranges, the system achieves aberration correction with fewer lenses, transforming the traditional approach of simply adding more lenses into a parameter-optimized design
2Manufacturing precision
If more lenses are added for aberration correction, then image quality is improved, but manufacturing cost increases
Solution Approach 1:
The optical system is segmented into two functional optical systems with specific lens groups (first A lens group, first B lens group, second A lens group, second B lens group). This segmentation allows each group to be optimized for specific aberration corrections, reducing the total number of lenses needed while maintaining high image quality
Solution Approach 2:
The patent defines specific parameter ranges through conditional expressions (e.g., -12fn1B/|f|<-2, -12fn2A/|f|<-2, -12fn2B/|f|<-2) that optimize the focal lengths and positions of negative lenses. This parameter optimization achieves cost-effective manufacturing by minimizing lens count while preserving image quality
3Volume of moving object
If the optical system is designed for narrow space application, then compactness is improved, but field of view is limited
Solution Approach 1:
The optical system employs a dynamic configuration where the first optical system (magnification side) and second optical system (reduction side) work in combination with variable magnification capabilities. This allows the system to adapt between compact configurations for narrow spaces and wider field of view configurations when needed
Solution Approach 2:
The patent introduces a dual optical system architecture that adds a functional dimension to the optical path. By separating magnification and reduction functions into distinct optical systems with specific lens groups, the system achieves wide-angle capability and adaptability without proportionally increasing the physical footprint
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 achieves high optical performance with a reduced number of lenses, enabling wide-angle projection while minimizing costs and optimizing lens configuration for aberration correction, suitable for both projection display devices and imaging apparatuses.
Implementation Method 1
a first optical system G1 that includes a plurality of lenses; and a second optical system G2 that includes a plurality of lenses
Data Source
AI summary
The imaging optical system consists of, in order from a magnification side, a first optical system and a second optical system. The first optical system consists of, in order from the magnification side, a first A lens group having a positive refractive power and a first B lens group having a positive refractive power with the maximum air gap interposed between the lens surfaces in the first optical system. The second optical system consists of, in order from the magnification side, a second A lens group having a positive refractive power and a second B lens group having a positive refractive power with the maximum air gap interposed between the lens surfaces in the second optical system.