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https://github.com/tenteeeee/ipd-relativty

IPD Adjustable Relativty (VR-HMD)
https://github.com/tenteeeee/ipd-relativty

relativty virtual-reality vr vr-headset

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IPD Adjustable Relativty (VR-HMD)

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README 

        
[日本語](./readme_ja.md)



# Interpupillary distance (IPD) adjustable Relativty






This is a [Relativty](https://github.com/relativty/Relativty) compatible HMD design for hackers and researchers.  

**The physical IPD is adjustable within 57~87mm left and right independently.**  

A top rail mount option is also available.



# Required components



Same as [Relativty](https://github.com/relativty/Relativty).  



|                                      Component                                      | Qty |

| :---------------------------------------------------------------------------------: | :-: |

|                   Fresnel lens(Diameter:42mm, Focal length:50mm)\*                  |  2  |

|              [Strap](https://www.aliexpress.com/item/33058848848.html)              |  1  |

|           [Face foam](https://www.aliexpress.com/item/4000199486058.html)           |  1  |

| [2 LCD panels with control board](https://www.aliexpress.com/item/32975198897.html) |  1  |



\*Their Fresnel lenses are sold out, but you may find a similar lens in Aliexpress.  



You also need to complete the build of the relativty motherboard when you want to use it with SteamVR or need 6DOF.



# 3D Printing



I optimized the 3D model for FDM (Fused Deposition Modeling) printers well.  

Therefore, **printing supports may not be required for this HMD model except for the face cover**.  

This HMD consists of three parts: HMD cover, and left and right eyeboxes.  

The following table shows the list of 3D printed components (rows 1-3: HMD cover, rows 4-6: Eyebox).



|                      Model                      | Qty |     |                      Model                     | Qty |

| :---------------------------------------------: | :-: | :-: | :--------------------------------------------: | :-: |

|          Top cover![img](./fig/top.png)         |  1  |     |      Bottom cover![img](./fig/bottom.png)      |  1  |

|      Face cover![img](./fig/facecover.png)      |  1  |     |    L/R separator![img](./fig/separator.png)    |  1  |

|  Side strap holder![img](./fig/side_holder.png) |  2  |     |  Top strap holder![img](./fig/top_holder.png)  |  1  |

|    Lens mounter![img](./fig/lensmounter.png)    |  2  |     |      Eyebox pillar![img](./fig/pillar.png)     |  2  |

| Right display mounter![img](./fig/rdisplay.png) |  1  |     | Left display mounter![img](./fig/ldisplay.png) |  1  |

|      Eyebox screw\*![img](./fig/screw.png)      |  2  |     |                                                |     |



\*You can use general M6 screws instead of the 3D printed eyebox screw if you want.



## If you really like rail mount



I prepared a special top cover.  

Please print `./stl/Top_rail.stl` instead of `./stl/Top.stl`.  

The cross-section of the rail is as follows (unit:mm):  

![img](./fig/rail_mounter.png)



# Assembly



No special tools are required, but if you have hot glues, you can attach the form into the face cover easily.



## Eyebox



Insert LCD panels into the display mounters at first.  

**The LCD panel is a fragile component**, so do not put too much power.  

If you bend the LCD mounter slightly, you can insert it without much power.  

You already know why I wrote this caution, right?



After installing the LCD panels, I recommend assembly the LCD panel cables as follows:  

![img](./fig/asm_eyebox.jpg)



The right-side cable should not be tightened with the center pole behind the LCD mounter.  

The cable may collide with the motherboard if it is tightened.



## HMD



Attach the L/R separator and the two eyeboxes into the bottom cover of the HMD using the eyebox screws or M6 screws.  

And... I think you can build the HMD already because it is too simple.  

If you want to verify the assembly, please check the CAD file in 3D-CAD, such as Fusion 360.



# Meow!



If the problem is related to the design of the HMD, please make an issue in this repository or report to [@TenteEEEE](https://twitter.com/tenteeeee).  

If the problem seems to be related to software, please ask to [Relativty](https://github.com/relativty/Relativty) team.



# License



This repository is released under the GNU General Public License v3.0 the same as [Relativty](https://github.com/relativty/Relativty).