# Spot Diagram

> An SVG spot-diagram plot for optical lens design that shows ray-intercept points per field angle, colored by wavelength or field, with the Airy diffraction-limit circle and RMS/GEO spot-size readouts. Ported to React from the ELEO UI Svelte component by ELE Optics (eleoptics.com).

- Author: [eleoptics](https://21st.dev/@eleoptics)
- Library: ELEOptics
- License: MIT
- Tags: Data Visualization
- Live preview: https://21st.dev/@eleoptics/components/spot-diagram

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/eleoptics/spot-diagram?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/data-visualization.md