It employs parallel beams of light and it is the effect of the optical elements under test on these beams which is measured by the instrument. These beams are affected by the surface quality as well as the homogeneity of the glass. By use of the Interferometer you are able to see the sum of the errors contained in an element or in an entire assembly. These errors can then be corrected by re-working one or more surfaces to compensate for the total error. In other words, the Interferometer permits you to examine an optical train as a whole and then correct any of the surfaces just as if you were correcting a simple system containing but one element.
Fine pitch threads on both vertical and horizontal screws.
Light Source Helium Neon Laser at 6328 . Accessories Provided with an auxiliary eyepiece, and Polaroid film packet. Approximately 1,200 lbs. The Fringe Analysis System eliminates any human error in evaluation of your parts. For theory of operation, please refer to the Principles of Interferometry Application Note.