Biomedical Engineering Reference
In-Depth Information
Fig. 9.2.
Evaluation of spatial phase-shifted interferograms. (
a
),(
b
) Spatial phase-
shifted interferograms
I
,
I
of two displacement states of a tilted metal plate; (
c
),(
d
)
Phase distributions
φ
,
φ
(mod 2
π
) calculated by (9.5) from (
a
) and (
b
); (
e
)Cor-
relation fringe pattern calculated by (9.3); (
f
),(
g
) Raw and filtered phase difference
distribution mod 2
π
obtained by subtraction of (
c
) and (
d
) modulo 2
π
;(
h
),(
i
)Un-
wrapped phase difference and corresponding pseudo 3D representation of ∆
φ
