Twelve-Lens Microscope Objective for High-NA 50x Imaging
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Solution Overview
Problem
Conventional microscope lenses suffer from distortions, limited working distance, and magnification issues due to optical structural constraints, which affect observation quality and convenience.
Innovation Solution
A microscope objective lens design comprising twelve lenses with specific geometric and optical parameters, including numerical aperture, focal lengths, and curvature radii, to achieve low distortion, large numerical aperture, and a wide working distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional microscope lenses use multiple lenses to achieve magnification, then magnification capability is improved, but optical total length increases and working distance decreases
Solution Approach 1:
The patent applies parameter changes by optimizing the focal lengths, curvature radii, and spacing of each lens element to achieve high magnification (50x) with a compact optical total length. The specific parameter ranges (e.g., f1/f between -3.96 and -0.73, R1/R2 ratios between 0.34 and 1.78) enable the lens system to maintain short length while providing required magnification capability.
2Productivity
If conventional microscope lenses use multiple lenses to achieve magnification, then magnification capability is improved, but working distance becomes shorter
Solution Approach 1:
The patent uses parameter changes to decouple magnification from working distance constraints. By carefully selecting focal lengths (e.g., f2/f between 1.10 and 4.09, f3/f between 1.97 and 9.06) and curvature radii ratios, the system achieves 50x magnification while maintaining an extended working distance, allowing sufficient space for specimen manipulation and observation.
3Ease of manufacture
If conventional microscope lenses use standard optical structures, then manufacturing is simplified, but optical distortions and aberrations increase
Solution Approach 1:
The patent applies local quality by assigning specific optical properties to different lens elements. Each lens (L1 through L12) has tailored curvature radii ratios and focal length relationships that address specific aberration types. For example, the first lens has (R1+R2)/(R1-R2) between 0.34 and 1.78 to control spherical aberration, while the twelfth lens has (R23+R24)/(R23-R24) between -7.00 and -1.50 to correct field curvature, optimizing local optical quality throughout the system.
4Device complexity
If conventional microscope lenses use standard optical structures, then device complexity is reduced, but optical performance and imaging quality deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the optical system into twelve distinct lens elements with specific functional assignments. This segmentation allows each lens to be optimized for particular optical corrections (spherical aberration, chromatic aberration, field curvature) while maintaining manageable device complexity. The systematic arrangement of positive and negative lenses creates a balanced system that achieves superior imaging quality without excessive complexity.
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 provides excellent optical performance with a large numerical aperture, wide working band, and 50 times magnification, reducing aberrations and enhancing imaging quality.
Implementation Method 1
a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, and a twelfth lens L12 arranged in order from an emitting side to an objective side
Data Source
AI summary
The present application relates to the field of optical lenses and discloses a microscope objective lens. The microscope objective lens includes in order from the emitting side to the objective side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens, and the following relationship expressions are satisfied: 1.50≤NA*f≤3.00; 0.15≤d4/TTL≤0.25; 5.00≤f12/f≤15.00; −7.00≤(R23+R24)/(R23−R24)≤−1.50. The microscope objective lens of the present application is capable of being used as a lens of the microscope with good optical performance, a large numerical aperture, and a wide working band with a magnification of 50 times.