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Project Log 2: Possible VR Goggle or Headset

A project log for DIY Full-body VR Rigid Haptic Piezoelectric Suit

Cheap Piezoeletric crystals could be used both as movement sensors and vibrational haptic simulators.

AnaniasAnanias 09/25/2022 at 22:560 Comments
Today is Sunday, 25 of September, 18:58 Brasilia Timezone

Being honest, I don't have very much going on, the Piezoelectric crystal "coins" will arrive around 20 of October. Basically, a month without doing much.

I will start planning the ins and outs of the rigid suit/armchair tomorrow with a 3D model (I hope), so I can easily calculate the amount of money I will need to build one. For now I'm thinking on buying PVC tubes and pillows to make a ultra-comfy armchair.

But I'm just writing this Log because I feel kinda bad for not keeping daily uptates on my projects, and I don't think it would be good to worry about the goggles at this stage of the project. Specially since the software part of the suit will be a nightmare... But let's get going anyway...


The VR goggles:

Now, a VR-Suit isn't much without VR Goggles. And VR goggles are expensive as f-heck, even though they are cheaper than the VR suits available on the market. I mean, the VR goggles that uses cellphones as the screen aren't expensive at all, you could even 3D print one at home.

In fact, there are a lot of open source VR goggles around there. However, most of them just uses a cellphone as a screen. I only found this link on "Instructables" where they use a Raspberry Pi and a LCD screen to make one.

Anyway, since it will be a rigid full-body suit, it doesn't need a really complex VR goggles system; After all, you won't have any room to move your head. So no need to put a tracker on there (I think/hope).

So my idea would be to use those homemade holo-goggles, they normally use cellphones too, but maybe they can allow for a higher definition than VR goggles. Just hear me out:

"Holographic" goggles are simply a reflection of light on a transparent film instead of individual pixels on a screen, you've probably already saw those "holographic" apps reflecting on transparent "cubes":

They aren't holograms like those seen in science fiction (those would be considered "volumetric displays"), but they are interesting enough.
The funny thing is that you can use that to make holographic lenses; Those "smart glasses" use this exact technology to make information visible for the user. Just think of it as a "projector" reflecting light on something.

And yes, there are Open Source Arduino smart glasses around the web:

The google "HoloLens" literally uses this to make its holographic glasses:

And obviously, some cheap VR goggles use this same technology to deliver some good enough quality:

And you can 3D print it:

I also found this video about a project that tries to minimise the size of VR goggles in general, not that it fits my idea, but I think it could be useful anyway.

And some time ago I found this display concept/product called "Looking Glass", that is basically a normal display that uses a lot of layers of "lenticular lenses sheets" to give the impression of a real hologram. The display shows the same image in 42 different angles one above other, so when it hits the different layers and different viewers, it shows the same image like it is a volumetric object.
However, it needs a LOT of processing power, literally a dedicated PC gamer just to show a pre-processed image.

Even though I don't intend to make something like this, this could be useful for someone and maybe for me.


Anyway, what I wanted to say after all of this:

You could use the Holographic goggles displays and the lenticular lenses sheets to give a higher definition and image quality, since you are not dependent on the electronic display size, but on its reflection (just like in the case of the smart glasses).

You could use various (cheap) small displays reflecting their images on various layers of transparent plastic layers (that maybe could be made using Lenticular Lenses Sheets) to overlap different details of the same image.
Yes, it would be bulky and need a lot of space, but it would be used in a rigid full-body suit anyway.

Imagine what happens on the Pancake Lenses, but with various layers of the holographic goggles, which could be cheaper.

You can even find some for less than 10 dollars on Aliexpress (specially if these are spare parts for smartphones).

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