Optical System Lens Groups Aberration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing ultra-short focal projection optical systems are cumbersome and inefficient due to the large number of optical lenses required to correct aberrations, leading to a bulky, heavy, and difficult-to-assemble projection device.
Innovation Solution
An optical system comprising a display unit, a first lens group, a second lens group, and a reflector, where both lens groups have positive focal powers, optimized with specific focal power relationships and configurations to reduce the number of lenses, thereby improving imaging quality and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple optical lenses are used to correct aberration in the optical system, then the imaging quality is improved, but the device size and weight increase
Solution Approach 1:
The patent combines multiple lens groups (first lens group with positive focal power and second lens group with negative focal power) into a single optical assembly that integrates aberration correction functionality. This merging approach reduces the total number of separate lenses while maintaining the ability to correct optical aberrations, thereby reducing device weight without sacrificing imaging quality.
Solution Approach 2:
The patent optimizes the focal power parameters of the lens groups, specifically setting the first lens group with positive focal power (φ100) and the second lens group with negative focal power (φ200), where 0.01≤|φ100|≤0.02 and 0.005≤|φ200|≤0.015. By carefully controlling these parameter ranges, the system achieves effective aberration correction with fewer lenses, reducing overall device weight.
2Measurement precision
If multiple optical lenses are used to correct aberration in the optical system, then the imaging quality is improved, but the assembly complexity increases
Solution Approach 1:
The patent merges multiple lens groups into a unified optical assembly structure, reducing the number of separate components that need to be assembled. The first lens group (with lenses L1-L9) and second lens group (with lenses L10-L15) are integrated into a single housing structure, simplifying the assembly process while maintaining aberration correction capabilities.
Solution Approach 2:
The optical system is segmented into two main lens groups with distinct functions: the first lens group (positive focal power) handles primary light transmission and the second lens group (negative focal power) handles aberration correction. This segmentation allows for modular assembly while reducing overall complexity compared to using many individual lenses.
3Measurement precision
If multiple optical lenses are used to correct aberration in the optical system, then the imaging quality is improved, but the projection device becomes larger
Solution Approach 1:
The patent combines multiple lens groups into a compact integrated assembly that reduces the overall volume of the projection device. The first and second lens groups are arranged in a space-efficient configuration within a single housing, eliminating the need for separate lens mounts and reducing the device footprint while maintaining optical performance.
Solution Approach 2:
The patent employs a reflective optical path where light passes through the lens groups and then reflects off a reflector to reach the projection screen. This dimensional change in the optical path (adding reflection) allows for more compact arrangement of optical elements, reducing the overall device volume while maintaining imaging quality.
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 solution results in a more compact, lighter, and easier-to-assemble projection device with enhanced imaging quality by optimizing the focal powers and configurations of the lens groups and reflector, addressing the issues of size, weight, and assembly complexity.
Implementation Method 1
both the first lens group and the second lens group have positive focal powers; the optical system satisfies the following relationship: 0.01≤|φ100|≤0.02 and 0.005≤|φ200|≤0.015
Implementation Method 2
a reflector in sequence along a transmission direction of light; the optical system satisfies the following relationship: 0.01≤|φ100+φ300|≤0.025; φ300 represents a focal power of the reflector
Data Source
AI summary
An optical system and a projection device are provided. The optical system includes a display unit, a first lens group, a second lens group, and a reflector in sequence along a transmission direction of light; both the first lens group and the second lens group have positive focal powers; the optical system satisfies the following relationship: 0.01≤|φ100|≤0.02 and 0.005≤|φ200|≤0.015; φ100 represents a focal power of the first lens group, and φ200 represents a focal power of the second lens group.