Thermoplastic hologram recording

Particle image velocimetry (PIV): use of photo-thermoplastic film for photographic recording of particle images

“…Beyond that, our investigations confirmed, that for a certain application the sensitivity of many PTP materials is nearly uniform in a wide spectral range, and that the materials are rather insensitive to exposure variations above a certain threshold (Urbach 1977;Cherkasov and Aleksandrova 1993). Our experiments showed, that the required exposures for PIV records on all PTP materials mentioned above should be about 0.2 J/m 2 at 2 =514 nm and d.= 633 nm.…”

“…For silver halide emulsions like Agfa Holotest 8E75, for example, ~;(f) is almost constant in the range of 0 <f< 2000 mm-~ (Bjelkhagen 1993). In contrast, PTP has a distinct bandpass characteristic, that strongly depends on the thickness of the thermoplastic layer and the development process (Urbach 1977). For RF/3 and a heating energy recommended for holographic applications, the diffraction efficiency reaches its maximum at typicallyf v 600 mm ~, and shows a full width at half maximum of about 400 mm ~.…”

Modern Optical Techniques in Fluid Mechanics

“…Usually this takes some time, and sensitive experiments may suffer from the time delay. The optimum solution in such cases (and also very convenient otherwise) is the use of a holographic camera working with photo thermoplastic film (Urbach 1977). Such films allow for almost instant processing and additionally give phase holograms.…”

Implications of the “Subquantum Level” in Carcinogenesis and Tumor Progression via Scale Relativity Theory

“…Photothermoplastics (PTP) -a hologram can be recorded in a multilayer structure consisting of a glass or Mylar substrate coated with a thin, transparent, conducting layer of indium oxide, a photoconductor, and a thermoplastic [83,84].…”