RT Journal Article
T1 Enhancing the sensitivity to small phase changes in double-exposure stroboscopic television holography
A1 Fernández Doval, Ángel Manuel
A1 Trillo Yáñez, María Cristina
A1 Cernadas Fraga, Daniel Carlos
A1 Vázquez Dorrío, José Benito
A1 López Vázquez, José Carlos
A1 Fernández Fernández, José Luis
A1 Perez-Martinez Perez-Amor, Mariano Jesus
K1 3311.11 Instrumentos Opticos
K1 2209.07 Holografía
K1 2201.11 Vibraciones
AB We present a new technique for enhancing the sensitivity of double-exposure stroboscopic television holography (TVH) to detect and measure vibrations of small amplitude. The technique is based in the modulation of the phase of the reference beam in synchronism with the vibration of the measurand and derives from a former technique that we originally contrived for phase evaluation. We propose two variants, characterized by the demodulation process used to generate the secondary correlograms, with different behaviors in terms of the sensitivity to the sign of the measurand and of the ease in detecting the presence and shape of the vibration. We have implemented this new technique in an electronic speckle-pattern interferometer and compared its performance with standard TVH techniques; vibrations with amplitudes as small as 8 nm have been observed with this setup.
PB Applied Optics
SN 00036935
YR 2000
FD 2000-09-01
LK http://hdl.handle.net/11093/998
UL http://hdl.handle.net/11093/998
LA eng
NO Applied Optics, 39(25): 4582-4588 (2000)
NO Comisión  Interministerial de Ciencia y Tecnología (CICYT) | Ref. TAP-99-1167-C03-01
DS Investigo
RD 13-ene-2025