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ENCYCLOPEDIA-OPTICAL CALCULATOR |
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Is possible to calculate the focal length necessary to see an object placed to a certain distance by knowing the dimensions of the sensor ( 1 ", 2/3 ", 1/2 ", 1/3 ", 1/4 " ). It is also possible to know the focal of the objective in use, by calculating the dimensions of what is seen. The table which follows contains the formulas necessary for the calculations |
E' possibile calcolare la lunghezza focale necessaria per vedere un oggetto posto ad una determinata distanza conoscendo le dimensioni del sensore (1", 2/3", 1/2", 1/3", 1/4"). E' anche possibile, conoscendo la focale dell'obiettivo da usare, calcolare le dimensioni di quanto viene visto. La tabella che segue contiene le formule necessarie per i calcoli. |
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CCD FORMAT |
1" |
2/3" |
1/2" |
1/3" |
1/4" |
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Knowing the height (h) of the object to be seen. |
f= 9.6 D/h | f= 6.6 D/h | f= 4.8 D/h | f= 3.6 D/h | f= 2.4 D/h |
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Knowing the width (l) of the object to be seen |
f= 12.7 D/l | f= 8.8 D/l | f= 6.4 D/l | f= 4.8 D/l | f= 3.4 D/l |
OBJECT DIMENSION BY FOCAL LENGHT
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CCD FORMAT |
1" |
2/3" |
1/2" |
1/3" |
1/4" |
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To calculate the height (h) of the object. |
h= 9.6 D/f | h= 6.6 D/f | h= 4.8 D/f | h= 3.6 D/f | h= 2.4 D/f |
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To calculate the width (l) of the object |
l= 12.7 D/f | l= 8.8 D/f | l= 6.4 D/f | l= 4.8 D/f | l= 3.4 D/f |
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