Optronis CamPerform C-540, Руководство пользователя

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CamPerform CP80-3-M/C-540 Ref. 1888-SU-01-C Page 26
Focal Length Calculation
Full Sensor Resolution
The required focal length of the lens at full sensor resolution (1696 x 1710
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 : 19,27))) = 48 mm
selected focal length = 50 mm
Reduced Sensor Resolution
At reduced sensor resolutions (e.g. 1200 horizontal x 1200 vertical pixels) the
focal length is calculated as follows:
27 , 19
1
] [
B
A
mm Length Focal
+
=
Object Size
2 2
008 , 0 ] [ D C mm Size Sensor
+ ⋅ =