Laser-induced fluorescence target generation in dye-doped polymer films has recently been introduced as a promising alternative to more traditional photogrammetric targeting techniques for surface profiling of highly transparent or reflective membrane structures. We investigate the photophysics of these dye-doped polymers to help determine their long-term durability and suitability for laser-induced fluorescence photogrammetric targeting. These investigations included experimental analysis of the fluorescence emission pattern, spectral content, temporal lifetime, linearity, and half-life. Results are presented that reveal an emission pattern wider than normal Lambertian diffuse surface scatter, a fluorescence time constant of 6.6 ns, a pump saturation level of approximately 20 μJ/mm2, and a useful lifetime of more than 300,000 measurements. Furthermore, two demonstrations of photogrammetric measurements by laser-induced fluorescence targeting are presented, showing agreement between photogrammetric and physically measured dimensions within the measurement scatter of 100 μm.
© 2004 Optical Society of America
Original Manuscript: October 29, 2003
Revised Manuscript: September 12, 2004
Manuscript Accepted: September 21, 2004
Published: December 20, 2004
Adrian A. Dorrington, Thomas W. Jones, and Paul M. Danehy, "Photophysics of laser dye-doped polymer membranes for laser-induced fluorescence photogrammetry," Appl. Opt. 43, 6629-6638 (2004)