Combining the ideas behind linear frequency modulated continuous wave radars and frequency domain photothermal radiometry (PTR), a novel PTR method is introduced. Analytical solutions to the heat diffusion problem for both opaque and transparent solids are provided. Simulations and experimental results suggest a significant improvement in the dynamic range when using the thermal-wave radar (TWR...

In microwave radiometry for early detection of breast malignancy a contacting antenna is scanned on the breast surface, while a pressure is exercised along with a deformation. Assuming the antenna at lower temperature than the breast, the results of a numerical modeling show an interesting increase in tumor radiometric visibility in compressed breast. Preliminary results on a real radiometric a...

Abstract At the Metrology Light Source, a 630 MeV electron storage ring for use of synchrotron radiation metrology applications, new beamline is dedicated to radiometry in vacuum-ultraviolet spectral range. The emphasis lies on traceability measurements and profound uncertainty analysis. To replace previously existing normal incidence monochromator which serviced more than 20 years now at diffe...

Related Articles The reciprocal relation of mutual inductance in a coupled circuit system Am. J. Phys. 80, 840 (2012) Teaching solar cell I-V characteristics using SPICE Am. J. Phys. 79, 1232 (2011) A digital oscilloscope setup for the measurement of a transistor’s characteristic curves Am. J. Phys. 78, 1425 (2010) A low cost, modular, and physiologically inspired electronic neuron Am. J. Phys....

Surface roughness has to be taken into account for accurate interpretation of photothermal measurements. An expression for photothermal signals from rough samples was derived by combining the effect of roughness induced thermal wave dispersion with the equivalent layer model. The performance of the proposed model was successfully demonstrated by comparing calculations with radiometric measureme...

It is often necessary to estimate the response of a camera under given lighting conditions, or perhaps to estimate lighting requirements for a particular camera. To assist with these calculations a number of examples are given below for common problems. It should be recognized that very accurate calculations are difficult; it is often better to start with a simple estimate and then fine tune th...

Atmospheric constituents have unique vibrational-rotational signature lines within the infrared spectrum and the signature intensities and line shapes vary with the constituent concentration and the atmospheric density. The recent development of stable, single frequency, single-mode laser local oscillators and nearly quantum-noise-limited heterodyne receivers have permitted the development of i...