Observation Device Variable Aperture Diaphragm Electronic Scaling
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Solution Overview
Problem
Existing observation devices face challenges in changing the observation scope by a large margin while maintaining necessary image performance, as mechanical configurations are bulky and slow, and electronic scaling reduces optical system performance.
Innovation Solution
An observation device with a variable aperture diaphragm and electronic scaling capabilities, controlled by a processor, allows for rapid and significant changes in the observation scope without mechanical movement, adjusting the numerical aperture to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical configurations (revolver with multiple objectives, zoom magnification function) are used to change observation scope, then observation scope can be changed, but device becomes bulky and operation becomes slow
Solution Approach 1:
The patent replaces mechanical configurations (revolver with multiple objectives, zoom magnification mechanisms) with electronic scaling using an image pickup device. The observation scope is changed by extracting and processing image signals electronically rather than through mechanical movement of optical components, thereby eliminating the need for bulky mechanical structures while maintaining the ability to change observation scope.
Solution Approach 2:
The patent creates an electronic copy of the optical imaging process by using an image pickup device to capture the image formed by the objective lens and then performing electronic scaling on the captured image signals. This allows the observation scope to be changed by processing the copied image data rather than physically changing the optical path, reducing device complexity.
2Device complexity
If electronic scaling is used to change observation scope, then device size is reduced, but optical system performance deteriorates
Solution Approach 1:
The patent changes the numerical aperture parameter dynamically by controlling the aperture diaphragm based on the electronic scaling ratio. When electronic scaling is applied to change the observation scope, the numerical aperture is adjusted accordingly to maintain optimal image quality. This parameter change ensures that the optical system performs reliably across different observation scopes while keeping the device compact.
Solution Approach 2:
The patent implements a feedback control mechanism where the control unit monitors the electronic scaling ratio and automatically adjusts the aperture diaphragm position to maintain appropriate numerical aperture. This feedback loop ensures that image performance is maintained across different observation scopes without requiring complex mechanical adjustments.
3Productivity
If electronic scaling is used without aperture adjustment, then operation speed increases, but image brightness and resolution deteriorate
Solution Approach 1:
The patent dynamically adjusts the numerical aperture parameter in response to electronic scaling operations. When the observation scope is changed through electronic scaling, the aperture diaphragm is controlled to modify the numerical aperture, thereby maintaining image brightness and resolution. This parameter adjustment occurs rapidly without mechanical movement of the entire optical system, preserving high operation speed.
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 high-speed, large-margin observation scope changes with maintained image performance, reducing device size and eliminating the need for mechanical components, while ensuring sufficient brightness and resolution.
Implementation Method 1
The objective forms an image with light from the object. The objective includes a lens group with positive refractive power
Implementation Method 2
The image pickup device converts an image of the object into an image signal
Data Source
AI summary
An observation device 100 includes an objective 2a, camera 3, an observation scope changing device, and a control device. The objective 2a having from 4× to 20× and including a positive lens group forms an image with light from sample S. The lens group includes a single lens L1 having a concave surface on an object side and a variable aperture diaphragm 4. The camera 3 converts the image into an image signal. The observation scope changing device performs electronic scaling on the image signal and performs an observation scope changing process. The control device controls the diaphragm 4 in accordance with the observation scope changing process. The observation device 100 satisfies a conditional expression is satisfied,3≤|fa/fGS|≤10where fa is a focal length of single lens L1 and fGS is a focal length of a lens group from an object plane to the diaphragm 4.