Related Experiment Video
Updated: Jun 16, 2025

Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
High-precision interferometric measurement method for the radius of curvature with a computer-aided adjustment model
None:
In order to achieve high-precision measurement of the radius of curvature, this paper proposes an interferometric measurement method with a computer-aided adjustment model. This model is based on the principle of light propagation and derives the parameters of the adjustment error caused by the misalignment. According to the relationship between the adjustment error and the surface change at the null point positions, the adjustment amount of the tested sphere is calculated. By adjusting the position of the tested sphere several times, the measurement error is reduced. Then, an interferometer model is established to simulate and validate the mathematical model, which is further validated through experiments. The proposed method is applied to measure the sphere with a nominal radius of -146.0076 mm. The experimental results show that the repeatability of the radius measurement is improved from 4.0 ppm to 1.7 ppm with the computer-aided adjustment model, which is nearly 2.3 times improved in precision. It also helps to improve the efficiency of the radius measurement.
More Related Videos
08:58Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
Published on: December 2, 2022
08:06Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants
Published on: October 28, 2022
Related Concept Videos
Degree of Curvature and Radius of Curvature
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
Field Procedure for Staking Out Curves
Radius of Gyration of an Area
Deformations in a Symmetric Member in Bending
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
Horizontal Curve: Problem Solving