S. Lazare et al., MICROLENSES FABRICATED BY ULTRAVIOLET EXCIMER-LASER IRRADIATION OF POLY(METHYL METHACRYLATE) FOLLOWED BY STYRENE DIFFUSION, Applied optics, 35(22), 1996, pp. 4471-4475
A new technique of microlens array fabrication based on the use of exc
imer laser radiation is described. Poly(methyl methacrylate) (PMMA) su
bstrates are treated with many low-energy KrF laser pulses and exposed
to styrene vapor. The irradiated material swells, producing spherical
microlenses that are stabilized by UV polymerization. The chemistry o
f this process and the optical quality of the lenses are discussed. (C
) 1996 Optical Society of America