â– Diffractive optical element lenses (DOE) are used for
their small volume in optics for beam shaping,
imaging and other optical systems.
â– Single layer DOEs are known to cause low efficiency
due. This is an inherent feature of single layer
components.
â– For these applications the requirements are
➢Control output light shape
➢Single component (robust + lower cost)
Multiple DOEs designed, the
efficiency increases with increasing
# of layers until it saturates near the
efficiency of a continuous ‘kinoform’
lens
â– The relation between the number
of layers, step width and focusing
efficiency was simulated
â– Focusing efficiency in the primary
and higher order spots was
simulated
