Multi-beam generator for dividing e.g. radiation of laser printer - has grating lattice formed of three rectangular cyclically repeating reference phase patterns of different widths and of two phase levels to generate three output beams.

摘要

The multi-beam generator includes a substrate and a lattice, which is formed on the substrate. The lattice is formed from cyclically repeating reference phase patterns. Each reference phase pattern consists of at least three rectangular patterns of unequal width in a direction along a surface of the substrate. The lattice has only two phase levels to generate at least three light beams. ADVANTAGE - Is efficient, generates multiple beams of uniform intensity from one laser beam, and can be manufactured using simple process.