A new collimating method for semiconductor laser array using binary optical elements is described in the paper and a binary beam collimator is designed and manufactured.

This paper designs an optical system and some lenses for the BD OPU, including collimator lens, beam shaping lens for laser beam shaping, and cylinder lens for signal detecting.

Firstly, a telescope system is made up with a concave lens and a long-focus convex lens, by which the angle of the parallel beam from the collimator can be change.