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z
z
ref
What about beam divergence and the inverse square law?
calculation techniques:
Fluence scaled to the depth of calculation and integration
(convolution) carried out over the field size at depth:
(
)
(
) (
)
(
)
(
)
Field
2
ref
ref
ref
ref
Field
, ,
,
,
,
d d
, ,
,
,
, d d
p
D x y z
x y
x x y y z x y
z
z
z
p
D x y z
x y
x x y y z x y
z
z
z
=
− −
=
− −