Secondsight - Virtual Reality Headset, VR HMD

by jarradhope, published

Secondsight - Virtual Reality Headset, VR HMD by jarradhope May 6, 2014
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These are Virtual Reality goggles for use with your mobile phone.

For full customization, you can get the full OpenSCAD source code and detailed build instructions here; https://github.com/secondsight/secondsight-hardware/


From https://github.com/secondsight/secondsight-hardware/blob/master/README.md

Preparing to Build a Headset

There a few pre-requisites that you need to build the secondsight headset from this project.

Head strap
3D printer
Android phone
Open cell foam or neoprene

We have had reasonable luck with lenses in the 25mm to 37mm diameter range, with a focal length of 50mm. The field of view is directly related to the diameter of the lens. A 35-37mm diameter lens seems to give a view that covers the whole phone at this focal length. A 25mm lens doesn't quite cover the whole phone.

We have tried as high as 50mm diameter. That lens had a field of view larger than the phone and required a larger visor design.

The current design is currently set for the 36mm Lens from B&L 5X Aspheric Pocket Magnifier. We will be releasing our own pcx lens designs soon.

Head strap

While you could use the headset by holding it to your face with your hands, this would get old really quick. The headset is designed to use a 40mm wide elastic strap to hold the headset. This gives good support without requiring an extremely tight fit to avoid slipping.

3D Printer

You should be able to use any 3D printer with a large enough build volume. The visor has been successfully printed in both ABS and PLA.

Android Phone

The current visor design is optimized for the Galaxy S4 phone. The design does not require exactly that phone, but it the front of the visor was designed around the dimensions of the S4. It has been used with different phones that are close to the same dimensions (e.g. Galaxy Nexus).

Open Cell Foam or Neoprene

The hard plastic is mildly uncomfortable fitting directly against your face. It's not painful, but it is hard plastic supporting a phone. A small amount of foam applied to the back side of the visor makes the fit much more comfortable.

A cheap source of reasonable material is a cheap mousepad. You can easily cut pieces to fit the visor.

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Great but how on earth do you change the openSCAD lens file? I don't have much experience with the language and I can't figure out what's going on. I just want to make the 37 mm one.

I like it, but its REALLY hard to adjust and I have to change it every time I use a different app.

Hey can someone tell me how to change the source code it so it fits lenses with diameter of 28mm

Very nice design! Simple but practical. I recommend this magnetic switch found here....http://www.thingiverse.com/thing:670565
this coupled with a NFR strip will allow you to control alot of games and apps. (just make and glue in place)
A cheap bluetooth remote control from Ebay works too, $4.00.

Google's Cardboard Magnetic Switch

What is the little part that prints in the space in the middle of the visor for?

it clips on to the front to act as a ridge to support the phone (if your elastic bands aren't strong enough)

Comments deleted.

This model requires a convex lens diameter is how much?

never used github....so...but I gave it a go, created an account, made a fork...I think...for near sighted eyes...downloaded the windows client..and my brain melted.I have no clue what to do now. where do I upload the changed files? sorry for my ignorance.

after you have pulled your fork using a git client, you make your changes, commit your changes then push your changes back to github.

Then you can visit secondsight github repo and make a pull request, pointing to your commit changes.

Thanks, I will I have my engineer father in law help, he uses social version sites; to me it sounds like thanksgiving.... take out my fork, make changes to my plate of food, push my plate back to table for more food.now I know now how my elderly parents feel when I try to explain 3d printers.

going to build one tonight. you have done an amazing job. my only issue is that my eyesight is near-sided (contact lens 5.00) and my close vision have deteriorated this year, so I have fiddle with lenses. Again, thank you for taking the time make & post this build.

thanks for the kind words, glad you like it. If you have any modifications for the lenses please submit a pull request on github! :)

Is that possible to remix it to use lens 28 diameter / 50 focal length? (Same lens that Google cardboard use).

Yes of course, check out the lens descriptors in

Parameters are;
Diameter, Focal Length, Phone Offset, Field Of View, Rim Thickness, Front Height, Lens Thickness

You can add your own here if none suit your needs, then in
on line 46 - you can change lens_name="b&l 35 5x"; to which ever descriptor.

If you add any new lenses, please make a pull request.

Do you use any apps on the phone? If so what do you recommend? Thanks! :)

Does this work with 2in lenses and Note 2?

Check out the README here; https://github.com/secondsight/secondsight-hardware/blob/master/README.mdhttps://github.com/secondsight... for a list of the lenses we tested, went as high as 50mm.
You can absolutely modify this to work with a bigger setup scroll down the readme to read the lenses.scad description on how to add a new lens.

what are the best measures? :) what are the measures used for you? Thanks :)

Did you see my previous reply? millimeters

What are the measures we use for printing??

Everything in OpenSCAD is based on mm, the stls should be the same :)