| 摘要 |
PURPOSE:To make possible simultaneous marking of two distant points with laser beams as the laser beam past a liquid crystal mask is split in two directions. CONSTITUTION:The laser beam 1a past the liquid crystal mask 2 is made incident on a prism 3. The laser beams 1b, 1c bisected by this prism 3 are made incident on polarization beam splitters 4a, 4b. The laser beams emitted from the parts contributing to the marking on the liquid crystal mask 2 are reflected by these polarization beam splitters 4a, 4b and are simultaneously marked on two pieces of objects 7a, 7b. |
