Surface Shape Measurement by OFDR Using Wavelength Swept Light Source – Actual Analysis Method and Measurement Examples
This white paper explains the configuration of an OFDR measurement system using a wavelength swept light source as well as the measurement procedure. Moreover, it describes large distance measurement of the surface shape of a large car in one scan series without moving the measurement system around the vehicle.
Index
- Introduction
- OFDR Measurement Procedure
- Measurement Principle
- Examples of Interferometer Configurations
- Linearize Processing and Sampling
- Delay Compensation
- Wavelength Dispersion Compensation
- Optical Path Length Difference Measurement of Reference Interferometer
- Peak Detection
- Distance Calculation
- Wavelength Sweep Width and Resolution
- Temporal fluctuation/variation in distance measurement
- Measurement Examples
- Car Body Surface Shape Measurement
- Gage Block Surface Shape Measurement
- Conclusions
- References