---
title: "Fringe Visibility (Contrast) calculator — AperiOptic"
description: "Visibility V = (Imax−Imin)/(Imax+Imin). Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/fringe-visibility-contrast"
---

# Fringe Visibility (Contrast) calculator

Visibility V = (Imax−Imin)/(Imax+Imin).

Category: [Spectroscopy](https://aperioptic.com/calculators)

Formula: `V = (Imax − Imin)/(Imax + Imin)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Imax | `Imax` |  | 1 |
| Imin | `Imin` |  | 0.05 |

## Result with the default inputs

- Visibility: 0.9048
- Contrast: 90.48 %

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/fringe-visibility-contrast?Imax=1`](https://aperioptic.com/calculators/fringe-visibility-contrast?Imax=1). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Interferometric visibility](https://en.wikipedia.org/wiki/Interferometric_visibility)

[All optics calculators](https://aperioptic.com/calculators)

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The interactive page: https://aperioptic.com/calculators/fringe-visibility-contrast (AperiOptic runs in the browser; free, no account). Every page of the site as Markdown: https://aperioptic.com/llms.txt