---
title: "Mirror Tilt → Beam Steering calculator — AperiOptic"
description: "Beam angular deviation from a mirror tilt and lateral shift after distance L. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/mirror-tilt-beam-steering"
---

# Mirror Tilt → Beam Steering calculator

Beam angular deviation from a mirror tilt and lateral shift after distance L.

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

Formula: `Δθ = 2·θ_mirror · Δx = L·tan(Δθ)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Mirror tilt | `tilt` | mrad | 1 |
| Lever arm | `L` | mm | 500 |

## Result with the default inputs

- Beam deviation: 2 mrad
- Lateral shift: 1 mm

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

Read more: [Wikipedia: Beam steering](https://en.wikipedia.org/wiki/Beam_steering)

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

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