Title :
3-D depth-resolved imaging through turbid media using time-gated photorefractive holography
Author :
Hyde, S.C.W. ; Jones, Roy ; Lynn, M. ; Barry, N.P. ; Dowling, K. ; Dainty, J.C. ; French, Paul M. W.
Author_Institution :
Dept. of Phys., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
Summary form only given. Depth-resolved three-dimensional images of turbid media may be obtained by using ultrashort laser pulses with an experimental configuration based on low-coherence holography, described as "light-in-flight". Only light arriving at the holographic medium (a photorefractive crystal) from a distinct depth within the object will temporally overlap and be coherent with the reference beam. Delaying the reference pulse, by adjusting its arm length, facilitates imaging at different depths in the object. Using picosecond pulses at 750 nm to write holograms in Rh-doped barium titanate (BaTiO/sub 3/:Rh), we have obtained depth-resolved images through scattering phantoms of 8 mean free paths thickness with 2-mm depth 30-/spl mu/m transverse spatial resolution.
Keywords :
holography; light propagation; optical images; photorefractive effect; turbidity; BaTiO/sub 3/:Rh; depth-resolved three-dimensional imaging; light-in-flight; scattering phantoms; time-gated photorefractive holography; turbid media; ultrashort laser pulses; Barium; Delay; Holography; Imaging phantoms; Laser beams; Light scattering; Optical pulses; Photorefractive materials; Spatial resolution; Titanium compounds;
Conference_Titel :
Lasers and Electro-Optics, 1996. CLEO '96., Summaries of papers presented at the Conference on
Conference_Location :
Anaheim, CA, USA
Print_ISBN :
1-55752-443-2
