Optical system for control of longitudinal displacement

Autor:	Sergei Constantin Dick, Igor V. Markhvida, Leonid Victorovic Tanin
Rok vydání:	1991
Předmět:	Physics Spectrum analyzer business.industry Laser Displacement (vector) law.invention Diffuser (thermodynamics) Speckle pattern Optics law business Optical filter Fluctuation spectrum Intensity (heat transfer)
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.28061
Popis:	In the present paper, a system for determining longitudinal displacement of an object is described. In this system the laser radiation is modulated by a rotating diffuser and it creates a dynamic specklefield whose intensity is analyzed by a low-frequency spectrum analyzer. A change in the geometrical parameters of the system due to varying the distance between the radiating head fixed on the object and the receiving unit with a diffuser changes the intensity fluctuation spectrum, which permits determining the displacement. The system is simple in design.
Databáze:	OpenAIRE
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