A new laser configuration has been devised utilizing a mercury mirror as one reflector. When the laser is oriented vertically, lasing occurs. This beam can thus be used for the precision alignment of vertical structures.
© 1971 Optical Society of America
Original Manuscript: June 30, 1970
Published: February 1, 1971
K. W. Billman, E. T. Leonard, and M. A. Yaffee, "True Vertical Laser," Appl. Opt. 10, 422-425 (1971)