Biomedical Engineering Reference
In-Depth Information
(a)
0.110
Diode 1
Diode 2
Diode 3
0.100
0.090
0.080
0.070
0.060
0.050
0.040
0
20
40
60
80
100
120
140
160
180
Azimuth (deg)
(b)
0.025
Diode 1
Diode 2
Diode 3
0.020
0.015
0.010
0.005
0.000
-0.005
-0.010
-0.015
-0.020
-0.025
0
20
40
60
80
100
120
140
160
180
Azimuth (deg)
FIGURE 9.6
(a) The response of individual photodiodes oriented vertically to angular displacement in the yaw direction.
(b) The calibrated output of the photodiodes after bias and scale factors were matched between the channels.
calculating accurate bearings. Consider a case
where the polarization filters on each channel
were aligned as well as possible by hand and then
assumed to be mutually separated by 60°. Equa-
tion
(9.4)
was applied to normalized but geo-
metrically uncalibrated sensors. Sensor responses
