Lamellar Bone Observation Microscope with Duplex Senarmont Compensators
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Solution Overview
Problem
Current lamellar bone observation microscopes face challenges in effectively observing samples with very small retardation, as existing polarization microscopy techniques struggle to provide clear and sensitive color contrast for such samples.
Innovation Solution
The lamellar bone observation microscope incorporates a configuration with a light source, condenser lens, objective lens, first and second polarizing plates, and wave plates, along with a Broce-Kohler compensator, to control polarization and phase differences, allowing for adjustable retardation and enhanced contrast through the duplex Senarmont method, enabling observation of samples with minute retardation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional polarization microscopy techniques are used to observe samples with very small retardation, then the observation method is simple, but the color contrast and sensitivity are insufficient
Solution Approach 1:
The polarization microscopy system is segmented into multiple functional modules: a first Senarmont compensator with first and second wave plates for illumination, a second Senarmont compensator with third and fourth wave plates for detection, and a Broce-Kohler compensator for sample retardation compensation. Each module operates independently to contribute to the overall sensitivity enhancement, allowing the complex system to be managed through modular functional divisions.
Solution Approach 2:
The patent combines multiple compensator systems (first Senarmont, second Senarmont, and Broce-Kohler) into a single integrated microscope configuration. The wave plates from both Senarmont compensators work together with the Broce-Kohler compensator to achieve cumulative retardation effects that enhance the detection sensitivity for samples with very small retardation values.
2Measurement precision
If the first and second wave plates are set at 45 degrees to the polarizing plates in a parallel Nicol state, then color contrast is enhanced, but the system requires precise angular alignment
Solution Approach 1:
The wave plates are pre-configured at specific 45-degree angles relative to the polarizing plates during system setup. This preliminary angular positioning establishes the optimal orientation for maximizing color contrast in the parallel Nicol state, eliminating the need for operators to perform complex angular calculations or adjustments during sample observation.
Solution Approach 2:
The system utilizes color changes as the primary indicator of retardation detection. By configuring the wave plates at 45 degrees to the polarizing plates, the system maximizes the color contrast produced by samples with different retardation values, enabling visual differentiation of lamellar bone structures through color variation in the observed image.
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
This configuration allows for clear visualization of lamellar structures with improved color contrast and sensitivity, effectively observing samples with small retardation by adjusting polarization states and phase differences, enhancing the observation capabilities of the microscope.
Implementation Method 1
a first polarizing plate disposed on the optical path between the light source and the condenser lens, the first polarizing plate being rotatable around an optical axis of the condenser lens and configured to pass only a polarization component in one direction of the light emitted by the light source
Implementation Method 2
a first wave plate disposed on the optical path between the first polarizing plate and the condenser lens and configured to introduce a phase difference of λ/4 in a γ direction of a component of the light that has passed through the first polarizing plate
Implementation Method 3
a second polarizing plate disposed on the optical path on an output side of the objective lens, the second polarizing plate being rotatable around the optical axis of the condenser lens and configured to pass only a polarization component in one direction of the light that has passed through the sample
Implementation Method 4
a second wave plate configured to introduce a phase difference of λ/4 in a γ direction of a component of the light that has passed through the objective lens
Data Source
AI summary
A lamellar bone observation microscope includes: a light source; a condenser lens for focusing light emitted by the light source onto a sample; an objective lens on an opposite side of the sample from the condenser lens; a first polarizing plate between the light source and the condenser lens to pass only a polarization component of the light emitted by the light source; a second polarizing plate configured to pass only a polarization component of the light passed through the sample in accordance with a relative positional relationship with the first polarizing plate; a first wave plate between the first polarizing plate and the condenser lens to introduce a phase difference of λ/4 in a γ direction of the light passed through the first polarizing plate; and a second wave plate for introducing a phase difference of λ/4 in a γ direction of the light passed through the objective lens.