Stereoscopic Microscope Focusing Lens Segmentation
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Solution Overview
Problem
Stereoscopic microscopes face challenges with intermediate image drift during focusing, leading to uncomfortable user experiences or high efforts in avoiding such drift, especially when adapting working distances between main and co-observer tubes.
Innovation Solution
A stereoscopic microscope design featuring an objective system with separate focusing lenses and an actuator to adjust the working distance, allowing for independent focal plane adaptation between main and co-observer optical paths, thereby compensating for tilting of stereoscopic optical axes and maintaining comfortable observation across different focal planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single focusing lens is used in the co-observer tube, then the device complexity is reduced, but intermediate image drift occurs during focusing
Solution Approach 1:
The single focusing lens is divided into two separate focusing lenses (first focusing lens and second focusing lens) that are spatially separated along the optical axis. This segmentation allows independent control of each lens, preventing intermediate image drift while maintaining manageable system complexity through modular design
2Reliability
If focusing lenses are separated into two distinct elements, then intermediate image drift is compensated, but device complexity increases
Solution Approach 1:
The system employs dynamic control where the first focusing lens and second focusing lens can be independently adjusted along the optical axis. This dynamic capability allows real-time compensation of intermediate image drift during focusing operations, maintaining image stability while the modular separation keeps the complexity increase manageable
3Adaptability or versatility
If the co-observer tube uses a different focal plane than the main observer tube, then adaptability is improved, but optical axis tilting occurs
Solution Approach 1:
The optical paths are segmented into separate focusing lens pairs for the main observer tube and co-observer tube. This segmentation enables independent focal plane adjustment for each tube while the separate optical paths prevent tilting of the stereoscopic optical axes, maintaining proper alignment even at different focal planes
Solution Approach 2:
Each optical path (main observer and co-observer) is equipped with its own dedicated focusing lenses with specific optical properties optimized for that path. This local optimization allows each tube to operate at its optimal focal plane independently without compromising the overall optical axis alignment or causing tilting
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
Enables relaxed and comfortable observation by compensating for tilting of stereoscopic optical axes and allowing independent adaptation of focal planes, reducing the effort required to maintain image stability during focusing.
Implementation Method 1
a first focusing lens (5a) having a first optical refractive power and a second focusing lens (6a) having a second optical refractive power
Data Source
AI summary
A stereoscopic microscopic providing at least one pair of stereoscopic optical paths comprises an objective system, a first focusing lens having a first optical refractive power and a second focusing lens having a second optical refractive power and at least one actuator. The first optical refractive power and the second optical refractive have different signs. The objective system and the first and second focusing lenses are commonly traversed by the at least one pair of stereoscopic optical paths, respectively. The actuator shifts at least one of these first and second focusing lenses along the at least one pair of stereoscopic optical paths to change the working distance and/or to vary an optical refractive power of at least one of these first and second focusing lenses. The first focusing lens is immediately neighboring the objective system along the at least one pair of stereoscopic optical paths.