A He-Ne laser beam is sent through a common path differential interferometer and the interference signal is detected by a p-i-n photodiode. Weak phase objects can be examined because optical path changes can be resolved to 0.1 Å with a time resolution of about 20 ns. Examples for different gas-dynamic investigations show good results and demonstrate the wide field of application for this type of laser interferometer.
Laser Interferometer for High Sensitivity Measurements on Transient Phase Objects
IEEE Transactions on Aerospace and Electronic Systems ; AES-8 , 2 ; 186-190
01.03.1972
1761198 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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