Polarizer transmission calculator

Calculate transmitted intensity and transmission fraction with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use transmitted intensity and transmission fraction to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Initially polarized intensity (chosen unit)
100
Successive relative polarizer angles (degrees)
30,45
Transmitted intensity (same unit)
37.5
Transmission fraction
0.375

Try another scenario

Initially polarized intensity (chosen unit)
110.00000000000001
Successive relative polarizer angles (degrees)
30,45
Transmitted intensity (same unit)
41.25
Transmission fraction
0.375
Calculation method

Calculation method

Transmitted intensity (same unit)

Successive Malus law factors cos²(relative angle), initially fully polarized.

Transmission fraction

Successive Malus law factors cos²(relative angle), initially fully polarized.

Symbols and units
a
Initially polarized intensity (chosen unit)
b
Successive relative polarizer angles (degrees)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Angles relative to previous polarization axis; unpolarized first-pass halving not assumed. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Angles relative to previous polarization axis; unpolarized first-pass halving not assumed.
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