Objective Lens Assembly for Adjustable Polarization and Excitation Angles
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Solution Overview
Problem
Existing optical spectrum detection technologies are limited in their ability to detect samples with varying characteristics due to fixed polarization states and angles, which affect sensitivity and accuracy, particularly when samples are periodically arranged or in low concentrations.
Innovation Solution
An objective lens with a customizable optical focusing assembly and total reflection lens, featuring a lens group with varying refractive indexes and a hemispherical prism, allowing for adjustable excitation angles and polarization modes, including annular vector polarized excitation, to optimize light focusing and detection across different samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed polarization state and angle are used in optical detection, then device structure is simple, but detection precision and sensitivity deteriorate for samples with periodic arrangement or low concentration
Solution Approach 1:
The patent implements dynamic adjustability of polarization state and excitation angle through a rotatable detection assembly that can change orientation angles (θ, φ) and polarization states (linear, circular, elliptical). This dynamic capability allows the system to adapt to different sample characteristics, resolving the contradiction between simple fixed structure and precise variable detection requirements.
Solution Approach 2:
The system enables continuous variation of key parameters including excitation angle (0-85°), polarization state (linear/circular/elliptical), and detection angle, allowing optimization of detection precision for different sample types while maintaining a relatively compact device structure through integrated optical paths.
2Reliability
If fixed excitation angle is used, then optical system is simple, but detection sensitivity deteriorates for samples requiring specific polarization matching
Solution Approach 1:
The detection assembly is designed to rotate and adjust its orientation angles (θ, φ) dynamically, enabling the system to match the polarization state requirements of different samples. This dynamic adjustment mechanism ensures reliable detection across various sample types without requiring multiple fixed optical systems.
Solution Approach 2:
A single optical system integrates multiple detection capabilities by allowing continuous adjustment of excitation angle (0-85°) and polarization state, making the system universally applicable to different sample characteristics rather than requiring separate specialized systems for each detection scenario.
3Measurement precision
If conventional objective lens is used, then structure is simple, but light focusing capability deteriorates for wide angle range and different polarization states
Solution Approach 1:
The objective lens is divided into multiple lens groups (first, second, third lens groups) with different functions: the first group focuses incident light, the second group focuses reflected light, and the third group focuses transmitted light. This segmentation enables independent optimization of each focusing function while maintaining overall system simplicity.
Solution Approach 2:
Different lens groups are designed with specific optical properties tailored to their functions: the first lens group handles incident light focusing, the second handles reflected light with specific angle ranges, and the third handles transmitted light. This local optimization of optical quality in different regions of the lens system achieves superior overall focusing capability.
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 enables wide-ranging optical detection capabilities, enhancing sensitivity and precision for various samples, including those with small dimensions, by adjusting excitation angles and polarization states, thus improving detection accuracy and applicability.
Implementation Method 1
a lens group, including at least two lenses, wherein excitation light, after passing through the lenses, is focused on a same point outside the housing
Implementation Method 2
a total reflection lens, mounted to the housing, wherein a sphere center of the total reflection lens is located on the focal point of the optical focusing assembly
Data Source
AI summary
An objective lens, an optical imaging device, an optical system, and a test method of the optical system, relating to the field of optical testing. The purpose is to optimize the structure of the objective lens. The objective lens comprises a housing and an optical focusing assembly. The housing comprises a cavity, and the cavity is provided with a first opening and a second opening. The optical focusing assembly is mounted in the cavity, the focal point of the optical focusing assembly is located at the second opening, and the optical focusing assembly is configured to focus light entering the housing from the first opening a to the focal point. The optical focusing assembly in the objective lens focuses light on the basis of one of the reflection principle and the refraction principle.