---
title: "Scanner Angular Range calculator — AperiOptic"
description: "Linear field of view from scan angle and focal length. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/scanner-angular-range"
---

# Scanner Angular Range calculator

Linear field of view from scan angle and focal length.

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

Formula: `FoV = 2·f·tan(θopt) · θopt = 2·θmech`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Mech. angle | `thm` | ° | 10 |
| Focal length | `f` | mm | 100 |

## Result with the default inputs

- Optical angle: 20 °
- Linear FoV: 72.794 mm

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/scanner-angular-range?thm=10`](https://aperioptic.com/calculators/scanner-angular-range?thm=10). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Laser scanning](https://en.wikipedia.org/wiki/Laser_scanning)

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

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