If you use photopolymers with initiators into the visible spectrum (400-440nm) you can leave the filters in and still achieve 1 second cure times per <100um layer.
Clear lenses are possible with features down to the few microns with inexpensive equipment. Sub-micron (>100nm) features are obtained using 2 photon-polymerization or optical beam lithography down to 9 nm features. On 06/27/2013 05:31 PM, Gregg Eshelman wrote: > --------------- > Google this (no, not kidding about the name) > lemon curry 3d printer > > The design uses a DLP projector with color and UV filters removed. 3D models > are sliced into sections then those profiles are projected either onto the > bottom of a clear tank or onto the top of the resin. > > A build plate either raises up out of the resin or lowers into it as the > resin is cured one very thin layer at a time. Surface finish matches or beats > commercial 3D printing machines with very high prices. Of course the print > quality is influenced by how accurate and rigid the homebrew printer is built. > > There are a few companies doing small scale production of printers based on > this method. > > What I'd like to see for this type of printer is a clear resin to see if can > print refractive lenses, as is possible with the newer Objet printers. > > ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
