Biomedical Engineering Reference
In-Depth Information
Fig. 9.7.
Distal endoscope ESPI sensor based on a 1/6 in. CCD sensor
Fig. 9.8.
Results obtained with a distal endoscopic speckle interferometer based on
a 1/4 in. CCD sensor. (
a
) White light image of an USAF 1951 test chart; (
b
) Corre-
sponding speckle image (
λ
= 514
.
5 nm), a lateral resolution of 8
.
7
µ
m is obtained; (
c
)
Correlation fringe pattern of displacement measurements on a tilted white painted
metal plate; (
d
) Corresponding filtered phase difference distributions
