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Transparencies can be printed using a variety of technologies. In the 1960s and 70s the GAF OZALID "projecto-viewfoil" used a diazo process to make a clear sheet framed in cardboard and protected by a rice paper cover. [1] In the 1980's laser printers or copiers could make foil sheets using standard xerographic processes. Specialist ...
Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image. [1]
Large laser elements made from transparent ceramics can be produced at a relatively low cost. These components are free of internal stress or intrinsic birefringence, and allow relatively large doping levels or optimized custom-designed doping profiles. This makes ceramic laser elements particularly important for high-energy lasers.
A photolith film [1] is a transparent film, made with some sort of transparent plastic (formerly made of acetate). Nowadays, with the use of laser printers and computers, the photolith film can be based on polyester, vegetable paper or laser film paper. It is mainly used in all photolithography processes.
It is also possible to print objects "bottom up" by using a vat with a transparent bottom and focusing the UV or deep-blue polymerization laser upward through the bottom of the vat. [17] An inverted stereolithography machine starts a print by lowering the build platform to touch the bottom of the resin-filled vat, then moving upward the height ...
The zig-zag appearance of the photomask is because optical proximity correction was applied to it to create a better print. Lithographic photomasks are typically transparent fused silica plates covered with a pattern defined with a chromium (Cr) or Fe 2 O 3 metal absorbing film. [6] Photomasks are used at wavelengths of 365 nm, 248 nm, and 193 nm.