Biomedical Engineering Reference
In-Depth Information
coeficient. The robustness of equation (4.6) is increased by the
normalization of
I
B
by
I
BMax
and has a correlation coeficient of
R
=
0.982 with the measurements [7].
0
Samples
Exponetial Model
1
0.8
1
4
5
0.6
2
3
6
7
11
0.4
8
10
9
0.2
0
200
400
600
800
1000
1200
1400
1600
Optical Path Lenght (
μ
m)
Figure 4.5
Plot of relation between blue light transmittance and membrane
thickness. Locations names are shown for each measurement;
location 0 is measured directly from the ilter.
4.4
Polariscope for Stress Magnitude Analysis
As it is desirable to integrate the stress measurement system with
the endovascular surgery simulator EVE, it is necessary to use ilm
instead of glass for polarizers, and quarter-wave plates and color
ilters to reduce the space occupied by the optic system. Therefore,
the polariscope coniguration should be robust against the quarter-
wave manufacturing accuracy. For that, we propose the polariscope
shown in Fig. 4.6.
o
o
Vasculature
Model
White
Light
Polarizer 0
Analyzer 90
Green Filter
1/4 Lplate
45
1/4 Lplate
-45
o
o
Figure 4.6
Polariscope coniguration to reduce the effect of quarter-wave
plates manufacturing precision in the system error.
Search WWH ::
Custom Search