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Camera Field Of View For Inspection Calculator

Work out camera field of view for inspection instantly with clear inputs, formula shown and shareable results.

About Camera Field Of View For Inspection Calculator

Field of view is sensor width times working distance divided by focal length. Fitting the part with 10-20% margin each side is normal practice, because part-to-part position variation and fixture tolerance mean a tightly framed part will occasionally clip the edge.

Formula

Field of view

FOV = sensor width x working distance / focal length; magnification = sensor width / FOV

Worked example

With the default values below, Camera Field Of View For Inspection Calculator returns Field of view width of 132.03. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sensor width
8.45 mm
Lens focal length
16 mm
Working distance
250 mm
Part width
100 mm

Results

Field of view width
132.03 mm
Optical magnification
0.06400 x
Part as share of the field
75.7% %
Margin each side of the part
16.02 mm

Step by step

  1. 1Values used
  2. 2Field of view
  3. 3Field of view width= 132.03 mm
  4. 4Optical magnification= 0.06400 x
  5. 5Part as share of the field= 75.7 %
  6. 6Margin each side of the part= 16.02 mm

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 5 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How much margin should I leave?

10-20% of the part size, more if the part is loosely located. Clipping an edge invalidates a measurement entirely.

Why use a longer lens further away?

It reduces perspective error and lets the camera sit clear of the process. The cost is more sensitivity to vibration and less depth of field.

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