You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
19 July 1996Simple laser interferometers for testing optics
Small laser interferometer are designed. Interferometer consists of two very small convex or concave mirrors and small flat mirror attached. Well-known Dall method of testing concave aspherical mirrors can be used with this interferometer. Concave ellipsoid mirrors can be tested as well as spherical one. It is possible to design very simple modification of the interferometer using only one very small convex mirror. A few interferometers can be used in a very large spectral range as they consist of mirror surfaces only. It is possible to use the interferometers to test optics, for testing transparent matter, to watch gas or liquid streams. Interferometers are very cheap and easily can be made in quantity. The interferometers are very small that is why they are especially recommended for testing optics in the Space.