Abstract
Recently microstereolithography techniques have been actively developed as a method to produce 3-D microdevices. Especially microtubes are expected to be applied to micro fluidic devices and artificial blood vessels in biology and medical science. Microtubes fabricated by conventional microstereolithography systems have rough surface due to direct laser writing. Here we propose and experimentally demonstrate a novel method using an optical vortex. In our method, since microtubes are fabricated by scanning optical ring of optical vortex, the microtubes have smooth surface. Such smooth microtubes are expected to be used for highly efficient micro fluidic devices and high-quality artificial blood vessels.
