In this study we applied thermal lens (TL) technique to study the effect of size on thermal diffusivity of cadmium sulphide (CdS) nanofluid prepared by using γ-radiation method containing particles with different sizes. In TL experimental set up a diode laser of wavelength 514 nm and intensity stabilized He-Ne laser were used as the excitation source and the probe beam respectively, respectivel...

EPITHELIUM-FIBRE CELL COUPLING IN THE EYE LENS PRESCOTT, A.R., DAHM. R.. HUTCHESON, A.M., QUIN!-AN. R.A., VANMARLE. J.‘, & VRENSEN. G§. Department of Biochemistry, University of Dundee, Medical Sciences Institute, Dundee, DDl 4HN. Scotland. * Department of Electron Microscopy, Faculty of Medicine, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands. 5 Department of Morp...

The wavelength dependence of thermal lens signal from organic dyes are studied using dual beam thermal bI technique. It is found that the profile of thermal lens spectrum widely differ from the conventional absorption spectrua in the case of rhodamine B unlike in the case of crystal violet. This is explained on the basis of varying contributi<mll' nonradiative relaxations from the excited vibro...

A theoretical model for the laser-induced thermal lens effect in weakly absorbing media is derived. The model predicts the intensity variation in the far field of the laser beam in the presence of the lensing medium and takes into account the aberrant nature of the thermal lens. Some experimental results which support the validity of this approach are presented.

Quantitative phase microscopy by digital holography provides direct access to the phase profile of a transparent subject with high precision. This is useful for observing phenomena that modulate phase, but are otherwise difficult or impossible to detect. In this letter, a carefully constructed digital holographic apparatus is used to measure optically induced thermal lensing with an optical pat...