> For the complete documentation index, see [llms.txt](https://www.sunscan.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.sunscan.net/build/list-of-parts/optics.md).

# Optics

In this section, we describe the optical components required for this project. You have two options for sourcing these parts: purchasing them individually through **Edmund Optics, Shelyak and SVBony** or acquiring a complete optical kit from **Shelyak**. Below are the details of each option to help you decide the best approach for your needs.

<figure><img src="/files/WeWsCgajwf2h6oIqfm1j" alt=""><figcaption></figcaption></figure>

<table data-view="cards"><thead><tr><th></th></tr></thead><tbody><tr><td><img src="/files/AlAfXVcfbFWpR0iugrfR" alt="" data-size="original"></td></tr><tr><td><img src="/files/ywHEObUY9rmxEPNcjliU" alt="" data-size="original"></td></tr><tr><td><img src="/files/QitNg6pQAER9lodanURb" alt="" data-size="original"></td></tr></tbody></table>

***

### **Purchase Individual Components**&#x20;

<table><thead><tr><th>Name</th><th width="273">Ref</th><th>Link</th></tr></thead><tbody><tr><td>Main refractor lense</td><td>Edmund #32-917 - D=25 F=200 </td><td><a href="https://www.edmundoptics.fr/p/25mm-dia-x-200mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2697/">https://www.edmundoptics.fr/p/25mm-dia-x-200mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2697/</a></td></tr><tr><td>Camera lense</td><td>Edmund #32-327 - D=25 F=100</td><td><a href="https://www.edmundoptics.fr/p/25mm-dia-x-100mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2288/">https://www.edmundoptics.fr/p/25mm-dia-x-100mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2288/</a></td></tr><tr><td>Collimator lense</td><td>Edmund #32-325 - D=25 F=75</td><td><a href="https://www.edmundoptics.fr/p/25mm-dia-x-75mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2287/">https://www.edmundoptics.fr/p/25mm-dia-x-75mm-fl-mgfsub2sub-coated-achromatic-doublet-lens/2287/</a></td></tr><tr><td>Mirror</td><td>Edmund #46-716 - 23x16x5mm</td><td><a href="https://www.edmundoptics.fr/p/16-x-23mm-uv-enhanced-aluminum-lambda4-mirror/7050/">https://www.edmundoptics.fr/p/16-x-23mm-uv-enhanced-aluminum-lambda4-mirror/7050/</a></td></tr><tr><td>Plane holographic reflection grating</td><td>Edmund #15-755 - 2400 l/mm - 25x25mm</td><td><a href="https://www.edmundoptics.fr/p/2400-grooves-25x25mm-200-800nm-holographic-high-performance-reflection-grating/43683/">https://www.edmundoptics.fr/p/2400-grooves-25x25mm-200-800nm-holographic-high-performance-reflection-grating/43683/</a></td></tr><tr><td>Neutral density 1.25" filter</td><td>SV139 - 1.25inch - ND 0.9</td><td><a href="https://www.svbony.com/sv139-nd-filter/#W9108B">https://www.svbony.com/sv139-nd-filter/#W9108B</a></td></tr><tr><td>Slit</td><td>Sol’Ex / SUNSCAN 2 positions 7 – 10 µm (GEN2)</td><td><a href="https://www.shelyak.com/produit/fente-solex-sunscan-2-positions-7-10-%c2%b5m-gen2/">https://www.shelyak.com/produit/fente-solex-sunscan-2-positions-7-10-%c2%b5m-gen2/</a></td></tr></tbody></table>

### **Optical Kit - Shelyak**

Alternatively, Shelyak offers a convenient kit that includes all the required optics pre-selected and ready to assemble. This option is ideal for those who want to minimize the risk of error and ensure all components are compatible with each other.

<https://www.shelyak.com/produit/optical-kit-for-sunscan-spectroheliograph/?lang=en>

**What’s Included in the Shelyak Kit:**

* All necessary lenses, mirror.
* Holographic reflection grating for light dispersion.
* Slit.

<figure><img src="/files/xiRbWfqI0HegTM9jGlM3" alt="" width="374"><figcaption></figcaption></figure>

***


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://www.sunscan.net/build/list-of-parts/optics.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.