Testing the parallelism of any surface with reference to a standard optically flat surface by using optical flat
Posted by mechlook info on October 23rd, 2011 10:34 PM | No Comment
This method is also used for checking height of gauge blocks.
The two blocks, one whose surface is made optically flat and the other whose surface is to be checked are wrung on a flat reference plane surface. An optical flat ...
Surface Contour Test
Posted by mechlook info on October 23rd, 2011 10:17 PM | No Comment
For studying the various surface contours, the optical flat is kept at certain inclination over the surface to be tested. Normally daylight is used and spectrum of daylight has a wavelength of approximately 0.0005 mm. Thus each fringe interval corresponds- ...
Interferometry Applied to Flatness Testing
Posted by mechlook info on October 23rd, 2011 12:37 PM | No Comment
The essential equipment for measurement by light wave interference is a monochromatic light source and a set of optical flats. An optical flat is a circular piece of optical glass or fused quartz having its two plane faces flat and ...
Light Sources for Interferometry
Posted by mechlook info on October 23rd, 2011 11:59 AM | No Comment
A wide variety of light sources is available for interferometry work but the selection of proper source for any application depends on-th?'requirements or results to be obtained by interferometer, cost and convenience. For simple applications like testing of surface geometry, ...