Optronis CamPerform C-72, Руководство пользователя

Страница: 28 / 39

CP80-25-M/C-72 Ref. 1889-SU-01-D Page 26
Focal Length Calculation
Full Sensor Resolution
The required focal length of the lens at full sensor resolution (5120x5120 Pixel)
is calculated as follows:
A: Distance from lens to object in mm
B: Size of the object in mm
Example:
A: Distance from lens to object = 300 mm
B: Object Size = 100 mm
calculated focal length = (300 : (1 + (100 : 32,583))) = 73,7 mm
Reduced Sensor Resolution
At reduced sensor resolutions (e.g. 1920 horizontal x 1080 vertical pixels) the
focal length is calculated as follows:
2 2
0045 , 0 ] [ D C mm Size Sensor
+ ⋅ =
] [
1
] [
mm Size Sensor
B
A
mm Length Focal
+
=
583 , 32
1
] [
B
A
mm Length Focal
+
=
Object Size