Photothermal beam-deflection imaging of vertical interfaces in solids

1986 ◽  
Vol 64 (9) ◽  
pp. 1265-1268 ◽  
Author(s):  
F. Alan McDonald ◽  
Grover C. Wetsel Jr. ◽  
Georges E. Jamieson
Keyword(s):  
Probe Beam ◽  
New Method ◽  
Beam Deflection ◽  
Beam Size ◽  
Thermal Barriers

A new method for calculating signals in photothermal beam-deflection imaging is reviewed and applied to the case of vertical interfaces (cracks or other thermal barriers) in opaque solids. The generality of the approach and the effect of finite probe-beam size are emphasized.

A Comparison of FT-IR/PA and FT-IR/PBD Spectra of Powders

1986 ◽  
Vol 40 (5) ◽  
pp. 636-641 ◽  
Author(s):  
P. G. Varlashkin ◽  
M. J. D. Low ◽  
G. A. Parodi ◽  
C. Morterra
Keyword(s):  
Probe Beam ◽  
Beam Deflection ◽  
Signal To Noise ◽  
Absorption Bands ◽  
Ir Radiation ◽  
Laser Probe ◽  
Ft Ir ◽  
Better Than

FT-IR photoacoustic (PA) and also photothermal beam deflection (PBD) spectra were recorded with the same particulate samples (graphite, charcoal, aspirin, and silica) under the same conditions in order to compare the quality of the spectra obtainable with the two techniques. A PA cell fitted with windows for the PBD laser probe beam was used, and PA and PBD spectra of each sample were recorded at 8 cm−1 resolution at each of the four different interferometer scan velocities. Although the overall aspects of FT-IR/PA and FT-IR/PBD spectra are the same, the signal-to-noise ratios of PA spectra are appreciably better than those of PBD spectra because PBD detection is more prone to disturbance by vibration than is PA detection. Absorption bands appear at the same wavenumbers in PA and PBD spectra. However, the relative intensities of bands of PBD spectra depend on the absorptive properties of the powdered solids; with weak absorbers, some bands may not be detected at all. PAS can be used with all powders. PBDS is of little or no use for the examination of weakly absorbing powders unless they scatter IR radiation extensively.

A Probe Beam Deflection Study of Ion Exchange at Poly(vinylferrocene) Films in Aqueous and Nonaqueous Electrolytes

Langmuir ◽  
2002 ◽  
Vol 18 (7) ◽  
pp. 2756-2764 ◽  
Author(s):  
C. Barbero ◽  
M. C. Miras ◽  
E. J. Calvo ◽  
R. Kötz ◽  
O. Haas
Keyword(s):  
Ion Exchange ◽  
Probe Beam ◽  
Beam Deflection ◽  
Nonaqueous Electrolytes

Probe beam deflection: A useful tool for the study of ion transport in polymers

1993 ◽  
Vol 60 (1-3) ◽  
pp. 167-172 ◽  
Author(s):  
C BARBERO ◽  
M MIRAS ◽  
R KOTZ ◽  
O HAAS
Keyword(s):  
Ion Transport ◽  
Probe Beam ◽  
Beam Deflection
Sign in / Sign up

Export Citation Format

Share Document