---
title: "Optical Table Isolation calculator — AperiOptic"
description: "Transmissibility of a passive isolator above its natural frequency. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/optical-table-isolation"
---

# Optical Table Isolation calculator

Transmissibility of a passive isolator above its natural frequency.

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

Formula: `T ≈ 1 / ((f/fn)² − 1)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Disturb f | `f` | Hz | 10 |
| Isolator fn | `fn` | Hz | 1.5 |

## Result with the default inputs

- Transmissibility: 0.023
- Isolation: 32.76 dB

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

Read more: [Wikipedia: Vibration isolation](https://en.wikipedia.org/wiki/Vibration_isolation)

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

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