Simple methods are presented for aligning beam expanders, pinholes, and crosshairs to laser beams. The reliability of these methods illustrates that often these procedures can be greatly simplified by observing the laser beam downstream from the element being aligned.
© 1997 Optical Society of America
Paul R. Spyak, "Beam Expander, Pinhole, and Crosshair Alignment to Laser Beams," Appl. Opt. 36, 9111-9112 (1997)