Accession Number : ADD001208

Title :   Holographic Interferometry Apparatus and Method of Measuring Deflections of Dynamic Bodies.

Descriptive Note : Patent Application,


Personal Author(s) : Sikora,Jerome P ; Mendenhall,Frederic T , Jr

Report Date : 25 Jun 1974

Pagination or Media Count : 18

Abstract : In the holographic interferometry apparatus of the patent application an object is arranged for synchronous rotation with a holographic recording plate on a motor shaft to thereby provide a constant spatial relationship between the object and plate. A pulsed source of coherent light is optically divided into an object and a reference beam which are expanded by separate lenses and directed symetrically of the axis of the rotating object. The expanded reference beam illuminates the holographic plate while the expanded object beam is scattered off the rotating object back to a centrally-apertured fully reflective mirror disposed concentrically of the object beam axis. The object beam is reflected by the mirror onth the holographic plate.

Descriptors :   *Holography, *Interferometry, Patents, Pulsed lasers, Optical equipment, Mirrors

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE