The creation of paraxial arbitrary focal lines by a Fourier computer-generated
hologram is demonstrated. The desired focal line is represented by a series of
connected straight line segments, each of which is implemented by a radial
harmonic function located on a different radial portion of the entire hologram.
Each subhologram is multiplied by appropriate linear and quadratic phase
functions and is shifted by some distance from the center. The two phase factors
determine the location of each line segment, while the in-plane shift determines
the tilt angle of the segment.
© 1995 Optical Society of America
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