Zoom System Parcentricity Correction via Image Detection
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Solution Overview
Problem
Existing zoom systems for stereomicroscopes and macroscopes face challenges in correcting parcentricity deviations caused by production tolerances, requiring complex and costly adjustments to maintain accurate imaging during zooming.
Innovation Solution
A method that detects positional differences between zoom positions to calculate and correct parcentricity errors by determining the stationary zoom center, using a control and display unit to input and process steps for positioning the object in the object plane, and applying a mathematical relationship to determine the required travel lengths for correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If constructive arrangement is used to ensure parcentricity, then parcentricity is given based on nominal dimensions, but production deviations cannot be compensated without great effort
Solution Approach 1:
The patent implements a feedback mechanism where the actual parcentricity deviation is detected (e.g., through image processing or measurement), and this detected deviation is fed back to the control system. The control system then calculates the necessary correction and actuates the positioning mechanism to compensate for the deviation, thereby achieving accurate parcentricity despite production tolerances.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with a control-based system. Instead of requiring elaborate mechanical structures to ensure parcentricity through constructive arrangement, the system uses electronic detection, calculation, and control to achieve the same goal, simplifying the overall device while maintaining precision.
2Manufacturing precision
If narrow production tolerances are adhered to, then parcentricity is constructively ensured, but manufacturing cost and complexity increase
Solution Approach 1:
The patent performs preliminary detection and calculation of parcentricity deviations during the setup or calibration phase. By detecting the actual deviation and pre-calculating the necessary corrections, the system compensates for production tolerances before normal operation begins, allowing standard production tolerances to be used without sacrificing precision.
Solution Approach 2:
The system dynamically adjusts positioning parameters based on detected deviations. Instead of relying on fixed constructive arrangement that requires tight tolerances, the system changes positioning parameters (such as stage position or optical alignment) in response to actual measured deviations, enabling relaxed production tolerances while maintaining precision.
3Manufacturing precision
If elaborate mechanisms are used to correct parcentricity, then production deviations can be compensated, but device complexity increases
Solution Approach 1:
The patent implements a self-service approach where the system automatically detects its own parcentricity deviation and corrects it without external intervention. The detection system measures the actual deviation, the control system calculates the correction, and the actuation system applies the correction automatically, eliminating the need for elaborate manual adjustment mechanisms.
Solution Approach 2:
The patent integrates multiple functions into a unified system. The same detection and control system handles various aspects of parcentricity correction across different objectives and zoom positions, rather than requiring separate specialized mechanisms for each function, thereby reducing overall device complexity.
Data Source
AI summary
A method for correcting the parcentricity in zoom systems. The positional difference in the image between at least two different zoom positions is detected in order to explicitly or implicitly determine the position in the image which remains stationary during zooming. The travel lengths of a means for positioning the object in the object plane required for correcting the zoom-dependent parcentricity error are calculated and provided as control variable for the appropriate positioning of the means for positioning the object in the object plane, such that the target position appears stationary in the image after or during zooming.