Photostability of Uranine via Crossed-Beam Thermal Lens Technique

External beam radiotherapy for retinoblastoma: II. Lens sparing technique.

A retrospective analysis is presented of the results of external beam radiotherapy for retinoblastoma utilising an accurate lens sparing technique. Local tumour control has been assessed in a consecutive series of 67 eyes in 53 children all of whom received external beam radiotherapy as the primary treatment of retinoblastoma. Follow up ranged from 12 to 82 months (median 35 months) with 76% of...

Study on the determination of molecular distance in organic dye mixtures using dual beam thermal lens technique.

A sensitive method based on the principle of photothermal phenomena to study the energy transfer processes in organic dye mixtures is presented. A dual beam thermal lens method can be very effectively used as an alternate technique to determine the molecular distance between donor and acceptor in fluorescein-rhodamine B mixture using optical parametric oscillator.

Probe beam image detection for mode-mismatched dual beam thermal lens spectrometry

A model jor CW induced mode-misinatched dual-beam thermal lens spectrornetty using the whole probe beam profIe has been developed. This model quantitut!'vely describes the intensit4 distribution bejore and afer the thermal lens has been created. It is considered that ujter passirzg tizro~cgh the therinal lens, the TM,, Gaussian probe beam becomes the sicperposition c?f' several Guicssiun beams ...

Thermal Lens Spectroscopy

Confocal thermal-lens microscope.

The use of a confocal detection scheme in a dual-beam thermal-lens microscope is presented. The scheme allows the measurement of absorption factors down to 1.2 x 10(-7) in a 0.35-microm3 volume by use of a heating laser power of 100 mW incident upon the sample. Results are presented that prove that a 450-nm axial resolution is possible when a 1.2 water immersion objective lens with a N.A. of 1....