Laser alignment system with plural lasers for impingement on a single target

A laser alignment system comprising;

• at least a first laser and a penta-prism for generating a flat optical light plane;
• and
• a target assembly comprising a light sensitive target cell operative for producing electrical signals indicative of locations at which said light plane impinges on said target cell, the target assembly further including first and second mirror assemblies disposed for reflecting the light plane onto the target cell such that the target cell sequentially reads first impingement data when said light plane is reflected from said first mirror assembly, second impingement data when said light plane is aligned directly with said target cell and third impingement data when said light plane is reflected from said second mirror assembly, whereby said first and third impingement data identify angular alignments of the target cell relative to the light plane and the first impingement data of the target cell identifies relative to the light plane.

A target assembly for a laser alignment system, said target assembly comprising a light sensitive target cell disposed such that a first laser beam directed along a first axis impinges on said target cell, a beam splitter disposed along the first axis and oriented such that the first laser beam directed along the first axis passes through the beam splitter and impinges on the target cell, the beam splitter being angularly aligned to the target cell such that a second laser beam directed along a second axis reflects off the beam splitter and impinges on the target cell, and a mirror substantially parallel to the beam splitter and disposed for reflecting the second laser beam along the second axis and onto the beam splitter, such that the second laser beam reflected by the mirror and the beam splitter impinges on the target cell.