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MicroscopyView.com

 

 

                 

 

                 

 

                 

 

MICRO MEASURING

    Next page                                          

 

 

                                                               

 

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.

 

 

 9.000

mm

or 9000

μm

at

20x

                 

 

 4.500

mm

or 4500

μm

at

40x

             

True Magnification   (Actual FOV  or  HFOV)

 

 

 1.800

mm

or 1800

μm

at

100x

             

If the actual FOV is 960 μm instead of 900 μm

 

 

 0.900

mm

or 900

μm

at

200x

             

The True magnification will be :

 

 

 0.450

mm

or 450

μm

at

400x

             

(180 / 960) x 1000 =   187.5x  instead of  200x

 

 

 0.180

mm

or 180

μm

at

1000x

                 

 

 

                               

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

 

 

 180

μm

or 0.180

mm

 is typically the FOV at 1000x

We will consider the horizontal FOV on each

 

 

    1

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.

 

 

 Field of view (FOV) with telescope

   

 

 Is the maximum view angle of a lens.

See the example on the next page   --->

 

 

 The number supplied by a manufacturer is the Apparent FOV.

   

 

 The True FOV (or Actual FOV) is found by :

   

 

  dividing the Apparent FOV by the magnification.