Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Physics and Vice Dean (Research) - FoNS



+44 (0)20 7594 7706paul.french Website




Ms Judith Baylis +44 (0)20 7594 7713




609Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Lagarto, J and Hares, JD and Dunsby, CW and French, PMW},
doi = {10.1007/s10895-017-2101-7},
journal = {Journal of Fluorescence},
pages = {1643--1654},
title = {Development of low-cost instrumentation for single point autofluorescence lifetime measurements},
url = {},
volume = {27},
year = {2017}

RIS format (EndNote, RefMan)

AB - Autofluorescence lifetime measurements, which can provide label-free readouts in biological tissues, contrasting e.g. different types and states of tissue matrix components and different cellular metabolites, may have significant clinical potential for diagnosis and to provide surgical guidance. However, the cost of the instrumentation typically used currently presents a barrier to wider implementation. We describe a low-cost single point time-resolved autofluorescence instrument, exploiting modulated laser diodes for excitation and FPGA-based circuitry for detection, together with a custom constant fraction discriminator. Its temporal accuracy is compared against a “gold-standard” instrument incorporating commercial TCSPC circuitry by resolving the fluorescence decays of reference fluorophores presenting single and double exponential decay profiles. To illustrate the potential to read out intrinsic contrast in tissue, we present preliminary measurements of autofluorescence lifetime measurements of biological tissues ex vivo. We believe that the lower cost of this instrument could enhance the potential of autofluorescence lifetime metrology for clinical deployment and commercial development.
AU - Lagarto,J
AU - Hares,JD
AU - Dunsby,CW
AU - French,PMW
DO - 10.1007/s10895-017-2101-7
EP - 1654
PY - 2017///
SN - 1573-4994
SP - 1643
TI - Development of low-cost instrumentation for single point autofluorescence lifetime measurements
T2 - Journal of Fluorescence
UR -
UR -
VL - 27
ER -