Surgical Microscope Continuous Zoom Cam for Smooth Field of View
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Solution Overview
Problem
Existing surgical microscopes suffer from discontinuous zoom due to unreasonable motion curves of the zoom lens and compensation lens sets, leading to discomfort and mechanical jamming during operation.
Innovation Solution
A surgical microscope continuous zoom system with exponential cam curves for the zoom and compensation lens sets, ensuring simultaneous and continuous movement along the optical axis, using a zoom cam with first and second cam curves to achieve linear focal length changes and prevent mechanical sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If unreasonable motion curves are used for zoom lens set and compensation lens set, then mechanical design difficulty increases, but continuous zoom function deteriorates causing discontinuities in field of view
Solution Approach 1:
The patent applies parameter changes by transforming the motion curves from conventional linear or polynomial forms to exponential curves. Specifically, the first cam curve for the zoom lens set and the second cam curve for the compensation lens set are both designed as exponential curves, which fundamentally changes the motion parameters to achieve continuous zoom while simplifying mechanical design.
Solution Approach 2:
The patent utilizes curvature principles by employing exponential cam curves instead of straight-line or simple curved paths. The exponential curves provide a specific mathematical curvature that ensures smooth, continuous motion transitions for both lens sets, eliminating discontinuities in the field of view during zoom operations.
2Ease of operation
If unreasonable motion curves are used for zoom lens set and compensation lens set, then zoom operation becomes simpler, but mechanical jamming increases
Solution Approach 1:
The patent changes the motion parameters from conventional linear or polynomial curves to exponential curves. This parameter transformation ensures that both the zoom lens set and compensation lens set move in a coordinated manner that prevents mechanical jamming while maintaining smooth zoom operation. The exponential nature of the curves provides optimal velocity and acceleration profiles.
Solution Approach 2:
The patent ensures continuous useful action by designing the exponential cam curves to provide uninterrupted, smooth motion throughout the entire zoom range. The curves are configured so that the zoom lens set and compensation lens set maintain continuous coordinated movement, eliminating pauses or jerky motions that could cause mechanical jamming.
3Device complexity
If conventional motion curves are used, then mechanical design is simplified, but discontinuous zoom causes observer discomfort
Solution Approach 1:
The patent applies parameter changes by adopting exponential curves for both cam curves instead of conventional linear or polynomial curves. This mathematical parameter transformation achieves continuous zoom functionality while maintaining manageable design complexity. The exponential form provides a balance between achieving smooth continuous motion and keeping the cam design practical.
Solution Approach 2:
The patent employs curvature principles through the use of exponential cam curves that provide smooth, continuous motion paths. The specific exponential curvature ensures that the lens sets move in a coordinated fashion that eliminates field of view discontinuities, thereby improving observer comfort without excessive design complexity.
Data Source
AI summary
Disclosed herein are a surgical microscope continuous zoom system and a surgical microscope. The continuous zoom system can be applied to a surgical microscope comprising a zoom cam (1). The continuous zoom system (2) includes: a front fixed lens set (21), a zoom lens set (22), a compensation lens set (23), a first rear fixed lens set (24) and a second rear fixed lens set (25) arranged sequentially along a main optical axis; the zoom lens set (22) and the compensation lens set (23) are configured, as driven by the zoom cam (1), to move simultaneously along the main optical axis between the front fixed lens set (21) and the first rear fixed lens set (24), to cause a system focal length value to change continuously and linearly; the zoom cam (1) comprises a first cam curve and a second cam curve; the first cam curve and the second cam curve are both exponential curves; the zoom lens set (22) moves following the first cam curve, and the compensation lens set (23) moves following the second cam curve.