Two complimentary methods for aligning a linear array of detectors are described. The alignment procedure effectively projects a set of reference coordinators as defined by the intersection of a laser beam with the interface of a pair of matched cube beamsplitters. The fractional (radiometric) error associated with this alignment procedure should be much less than 0.1%.
Mitchell W. Finkel,
"Two Complimentary Methods For Aligning Linear Arrays", Proc. SPIE 0608, Optical Alignment III, (12 May 1986); doi: 10.1117/12.976194; https://doi.org/10.1117/12.976194