2,1 Fluorescence of Oil Films in shape, with maximum located at 420.490 nm, 
depending on oil type and film thicknes. As thickness 
Thin oil films were made in quartz cells of special rises from 1 to 100 microns the spectral maximum 
shape with constant distance between parallel plates shifts for 10...40 nm to longer wavelengths depending 
varied from 1 to 1000 microns. on oil type. 
Fluorescence of gasoline excited at 220 or 270 nm has a The fluorescence of oil film show very conservative 
maximum at 290 nm. The emission maximum of diesel behaviour with excitation wavelength alteration. The 
fuel is located at 350..400 nm under excitation emission maximum location and spectral shape keep 
wavelength up to 337 nm. Fluorescence spectra for constant while excitation wavelength remains below the 
different crude oils have broad emission bands similar emission maximum. 
A 
[ as LIBYAN CRUDE OIL d=10 pm 
ZA 
nmental GASOLINE ! | DIESEL FUEL eon 
tique for d=10um | \ d=1pm / 266 
'd oils as | d [ \ 
Water are Excitation 
ra of oil [ \ wavelength, nm = | A EN \ 
oil film ( \ Jess UN 
e due t | | f Bown dy. Y 
er power 222 
S a Very | [- N \ 
proposed 
# 266(/\ | 
| de 
/ N 
e spectra. : . 
scientific 9 \ 
r mineral A N 
| in water e 
1 1 1 1 i 
300 400 500 A, nm 400 500 A, nm 
s for oil 
) serious SHAIMSK CRUDE OIL d = 1 um LIBYAN CRUDE OIL d =1 pm 
rescence 
natter of / A 266 
is more 222 
ess. 
orescent 
eral oil 
several 
ater was 
rescence 
organic 
IL 
citation 
samples 
f " Jobin nri > 1 : A 
ed from 300 400 500 A, nm 400 500 A, nm 
of laser 
Fig. 1. Fluorescence emission spectra of mineral oils at different excitation wavelengths. 
569 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996