Multi-Feature Calibration Device for Optical Measurement Precision
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Solution Overview
Problem
Current optical part measuring systems face challenges in achieving precise calibration due to limitations in existing calibration devices, which affect the accuracy and reliability of measurements.
Innovation Solution
A calibration device with rotationally symmetric regions, including step-shaped, cylindrically-shaped, and frustum-shaped portions, providing multiple calibration information points and support structures to align optical components accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional manual gauging devices are used, then ease of operation is maintained, but measurement precision and reliability deteriorate
Solution Approach 1:
The patent introduces a calibration device as an intermediary standard object with precisely defined geometric features (spheres, cylinders, planes, cones) that mediates between the optical measurement system and the measurement task. This calibration device provides known reference geometries that enable the optical system to establish accurate measurement relationships without requiring complex manual gauging procedures, thus improving measurement precision while maintaining operational simplicity.
2Reliability
If existing calibration devices are used, then device complexity is reduced, but measurement precision and reliability deteriorate
Solution Approach 1:
The calibration device is segmented into multiple distinct geometric feature sets including spheres, cylinders, planes, and cones, each providing specific calibration information. This segmentation allows the optical measurement system to perform multiple types of calibration operations using a single standardized device, improving reliability through comprehensive calibration coverage while avoiding the need for multiple separate calibration tools that would increase overall system complexity.
Solution Approach 2:
The calibration device is designed as a universal multi-functional standard object that can be used across different optical measurement systems and for various measurement tasks. The combination of multiple geometric features (spheres for spherical calibration, cylinders for cylindrical calibration, planes for flatness calibration, cones for conical calibration) enables a single device to perform multiple calibration functions, improving reliability through consistent reference standards while reducing the complexity of managing multiple specialized calibration tools.
Data Source
AI summary
A calibration device for use in an optical, part measuring system is provided. The device has a central axis and a plurality of regions which are rotationally symmetric about the axis. The device includes a series of step-shaped portions defining a multi-step region having a plurality of step edges. A profile of the multi-step region contains information for calibrating the system. The device further includes a plurality of cylindrically-shaped portions spaced apart along the axis and defining constant diameter regions containing information for calibrating the system. The device still further includes a frustum-shaped portion defining a pair of spaced, slope edge regions and a sloped region having boundaries marked by the pair of slope edge regions. The frustum-shaped portion has first and second diameters at its boundaries which define a range of diameters of parts capable of being measured in the system. A profile of the slope edge regions and the sloped region contains information for calibrating the system.