| Popis: |
The new portable phase-stepping interferometer for micro/macro measurements of shape, normal displacements and refractive index variations is presented. Depending on the investigated objects different measurement methods (fringes projection, image plane, common-path and speckle-shear interferometry) are used, with subsequent digital processing of the interference patterns. The interferometric set-up includes high resolution CCD camera, computer controlled opto-electronic feedback and a set of interference filters for different laser light sources. It provides high precision measurements in working conditions and daylight background illumination, as well as possibility of “real-time” operation and adaptive measurement mode in a wide dynamic range. |
