K. Loose et al., Beam characteristics of optical fibre system using light-emitting diode sources for photographic curing, INT J JPN P, 33(2), 1999, pp. 105-108
Citations number
7
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF THE JAPAN SOCIETY FOR PRECISION ENGINEERING
For photographic curing a liquid monomer, an optical fibre system using 102
4 light-emitting diode (LED) sources is applied. The hitherto unknown chara
cteristics of the light were investigated experimentally. The radial intens
ity in the light from the LED was distributed in multiple modes. The highes
t coupling efficiency was only 2.2%. The intensity distribution was changed
considerably through the optical fibres and, at the resin surface, appeare
d to correspond approximately to the Gaussian mode. When increasing power b
y 37%, the beam diameter increased by 5%. Minor disturbances hardly changed
the distribution of power among the fibre's modes.