Title :
Feasibility of real-time terahertz speckle metrology
Author :
Knyazev, Boris A. ; Chaschina, Olga I. ; Cherkassky, Valery S. ; Dem´yanenko, Mikhail A. ; Esaev, Dmitry G. ; Kulipanov, Gennady N. ; Vinokurov, Nikolay A.
Author_Institution :
Budker Inst. of Nucl. Phys., RAS, Novosibirsk
Abstract :
A 100-W terahertz free electron laser and a 160times120 microbolometer focal plane array were used to record speckled images of different objects. First- and second-order statistics of the speckle patterns obey classical dependencies. Using a set of speckle photographies, recorded with a repetition rate of 41 frames/s, amplitude and logarithmic decrement of damped rotational oscillations of a diffuse reflector were determined.
Keywords :
bolometers; free electron lasers; measurement by laser beam; object detection; speckle; terahertz wave detectors; microbolometer focal plane array; object movement detection; power 100 W; real-time speckle photography; real-time terahertz speckle metrology; speckle patterns; terahertz free electron laser; Apertures; Connectors; Free electron lasers; Light scattering; Metrology; Optical arrays; Photography; Speckle; Statistics; Surface emitting lasers;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665840
