














MICRO MEASURING 




Field of view (FOV) with microscope 
Relative Magnification 


Is the diameter of view that you see 
Is the magnification relative to the components. 


when looking into a microscope. Typically you will see : 
Objective 10x with 10x eyepiece and numeric zoom 2x 



will produce a relative magnification of 200x. 


mm 
or  9000 
μm 
at 
20x 


mm 
or  4500 
μm 
at 
40x 
True Magnification (Actual FOV or HFOV) 


mm 
or  1800 
μm 
at 
100x 
If the actual FOV is 960 μm instead of 900 μm 


mm 
or  900 
μm 
at 
200x 
The True magnification will be : 


mm 
or  450 
μm 
at 
400x 
(180 / 960) x 1000 = 187.5x instead of 200x 


mm 
or  180 
μm 
at 
1000x 


HFOV will be used in this site instead of Actual FOV. 


μm 
or  0.180 
mm 
is typically the FOV at 1000x 
We will consider the horizontal FOV on each 


μm 
or  0.001 
mm 
is called micron or micrometer 
horizontal typical image of 800 x 600 pixels. 

Micrometer : one millonth of a meter. 
The HFOV will be compare to the FOV diameter 


you will see at microscope for a final mesurement. 















