Ten-Group Micro-Objective Lens for Wide Field High Resolution
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Solution Overview
Problem
Conventional micro-objective lenses fail to simultaneously achieve a wide field of view and high resolution, which is crucial for advanced micro-imaging applications, especially in biomedicine, due to limitations in numerical aperture and aberration correction.
Innovation Solution
A high-resolution broadband imaging system comprising a micro-objective lens with ten carefully arranged lens groups, including combined positive and doublet lenses, and a light splitter with a half-transparent and half-reflecting lens, along with a dichroscope, to enhance numerical aperture, correct color differences, and improve imaging clarity across a broad wavelength range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional micro-objective lens structure is used, then device complexity is low, but field of view and resolution cannot be simultaneously achieved
Solution Approach 1:
The objective lens is divided into ten distinct lens groups (first through tenth lens groups), each with specific optical functions. This segmentation allows independent optimization of each group to collectively achieve both wide field of view and high resolution, resolving the contradiction between device complexity and performance.
Solution Approach 2:
The patent employs composite lens structures including doublet lenses (combining lenses of different materials) and combinations of positive and negative focal length lenses. This use of composite optical materials enables correction of chromatic and spherical aberrations while maintaining high resolution across a broad field of view.
2Measurement precision
If numerical aperture is increased to improve resolution, then resolution improves, but application difficulty increases
Solution Approach 1:
The patent achieves high resolution by optimizing multiple optical parameters including numerical aperture, focal lengths of individual lens groups, and spacing between groups. By carefully adjusting these parameters across ten lens groups, the system achieves NA up to 0.3 with working distance of 20mm, balancing resolution improvement with ease of application.
3Measurement precision
If fluorite lens is used to improve color difference and imaging quality, then imaging quality improves, but device complexity and cost increase
Solution Approach 1:
The patent uses doublet lens structures combining different glass types (indicated by various glass codes) to correct chromatic aberration. This composite material approach provides effective color difference correction across broadband wavelengths without requiring single fluorite elements, managing complexity while maintaining imaging quality.
4Area of stationary object
If field of view is expanded for extensive observation, then field of view increases, but resolution may be compromised
Solution Approach 1:
The ten-lens-group structure allows different zones of the optical system to handle different functions: front groups manage wide field coverage while rear groups maintain resolution. This segmentation enables the system to achieve both extensive field of view and high resolution simultaneously, unlike conventional single-structure lenses.
Solution Approach 2:
Different lens groups within the system have locally optimized properties - some groups are designed for wide-angle correction while others focus on resolution maintenance. This local quality differentiation across the optical path enables simultaneous achievement of wide field of view and high resolution.
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 a significantly expanded field of view and high-resolution imaging, exceeding conventional systems by two orders of magnitude with uniform full-field resolution, effectively reaching the diffraction limit and providing high imaging clarity and fluorescence imaging capabilities.
Implementation Method 1
A micro-objective lens, comprising the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, the sixth lens group, the seventh lens group, the eighth lens group, the ninth lens group and the tenth lens group with optical axis arranged in a sequence from the left to the right
Implementation Method 2
We often use fluorite lens of low refraction and low chromatic dispersion to improve color difference and imaging quality of the lens
Data Source
AI summary
The present invention discloses a micro-objective lens, comprising the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, the sixth lens group, the seventh lens group, the eighth lens group, the ninth lens group and the tenth lens group with optical axis arranged in a sequence from the left to the right; the focal length of the first lens group is negative; the second lens group belongs to doublet, in which the focal length of the first and second lens is positive and negative respectively; the focal length of the third lens group is positive; the fourth and fifth lens groups belongs to doublets, in which the focal length of the first and second lens in each group is negative and positive respectively; the focal length of the sixth lens group is positive; the focal length of the seventh and eighth lens groups is negative; the focal length of the ninth and tenth lens groups is positive. The present invention also discloses a high-resolution broadband imaging system with aforesaid micro-objective lens.