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THE FEUTEX TOOLKIT

Crossed Polarizer Transmission

Estimate ideal transmission through a second polarizer at a chosen relative angle.

Photography workspace● Runs in your browser
01 Your input
02 Your result
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FormulaTransmitted power = power*cos(angle*PI/180)**2; Transmission = 100*cos(angle*PI/180)**2
Sources and model references

Worked example

Inputs

Already polarized input power
100 arbitrary power
Relative axis angle
60 degrees

Expected results

Transmitted power
25 same power units
Transmission
25 %

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Estimate ideal transmission through a second polarizer at a chosen relative angle.
  2. Set already polarized input power, relative axis angle in the indicated units.
  3. Calculate and compare transmitted power, transmission.

Try this example

{
  "power": 100,
  "angle": 60
}

Accuracy and scope

Ideal Malus law for already linearly polarized light; real polarizer losses and extinction ratio are excluded.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.