Some geometrical transforms cannot be implemented as computer-generated holograms (CGH’s) with Bryngdahl’s technique. The phase functions of these geometrical transforms have phase singularities that cause branch points in the transmission functions of CGH’s. An example of such a geometrical transform is the rotation transform. This transform is implemented by including a superposition of phase singularities in the phase function of the CGH. I present results of this implementation.
© 1993 Optical Society of America
Original Manuscript: May 27, 1992
Published: July 10, 1993
Filippus Stefanus Roux, "Diffractive optical implementation of rotation transform performed by using phase singularities," Appl. Opt. 32, 3715-3719 (1993)