DIY Lens for Google Cardboard VR

8/18/2019 DIY Lens for Google Cardboard VR

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Introduction:

Since Google launched it's VR cardboard last 2014.,i've read some good

feedbacks about it.,And last May 2015.,the cardboard VR supports iOS.,Getting

the VR cardboard is cheapest way to experience Virtual Reality.,And i asked

myself can you DIY a complete functioning VR cardboard from recycled

stuff.,Including the lens.That's how this project started.,And i'm sharing it here

how to build a Google Cardboard VR all from scratch at no cost.,Using

recyclable materials

•(That is if you have have all the basic tools needed for this project.)

Step 1: Needed Things

Materials and Tools needed:

- Google Cardboard templates

- Scissors

- Exacto knife (stencil cutter)

- Glue- Quick dry Epoxy

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About This Instructable

Posted:Jul 23, 2015

License:

5,211 views

140 favorites

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- *Transparent (clear) plastic bottle *

^made of (PET)

*stands for polyethylene terephthalate. PET (also known as PETE)*

-Syringe with needle

- Velcro or rubber band

- Glue stick (for glue gun)

-neodymium magnet(optional for older iphones)

*a smartphone(iOS & Android)

Step 2: Steps

I will focus the steps on how to make a Biconvex lens out of used clear plastic

empty bottle.,Because the cardboard VR is useless without the Lens (the most

important part of the VR) So anyone who will try this project can go forward and

start the Cardboard VR casing.,And some of the images here shows how i build

the Google Cardboard VR.,

(you can find steps on how to build or assemble a Google VR cardboard here in

instructables and in various websites or in youtube).So i'll start first with the

lens.Then followed by the cardboard VR.

•STEPS TO MAKE LENS

1.Find an empty clear bottle with a good "Curvature"2.Then make a circular template (25mm diameter)on a sheet of

cardboard/paper.As seen on image.

3.Then cut the marked you made on plastic bottle using scissors.

4.Make and cut at least 4 pcs of this.,because you'll need 2 pcs together to

create a a single biconvex lens

5.Combine 2 pcs together to create a biconvex shape lens.

6.Carefully sealed all the circumference sides of the biconvex shape plastic you

just joined.

7.Now that you have sealed all the sides using quickdry epoxy.Fill your syringe

with clear water and carefully inject it on the biconvex shape until you filled it up.

*to removed bubbles-just pinched or gently squeeze the lens-to slowly remove

all the big bubbles in it.

8.After successfully removing bubbles filled it with water(the lens).,Sealed itagain.Seal the hole you just made by syringe needle.

9.Let it dry for a few minutes..Test it-if it magnifies things.Try to magnify small

things-(like printed letters).

10.After succesfully made a biconvex lens that magnifies things up.,Repeat the

procedure for your second and last biconvex lens.

*If you successfully magnifies things up..Congratulations.!.,your good to go on

building your own Google Cardboard VR.,

•It's fun building things up by youself.

•Next Images is how i build my Google Cardboard VR.

Though it's not so very elaborate steps,,but you can google it for more elaborate

one.,specially regarding the use of magnets to control your phone while inside

the VR cardboard.

•i dont use any magnets on my VR Cardboard.Will be discussed in some parts

of this instructables.

Step 3: Steps

See More (/tag/type-id/?q=)

Make Google cardboard

DIY virtual reality 3D

glasses (/id/DIY-virtual-

reality-3D-glasses/)

by Stojan Mitric

Minecraft for Google

Cardboard (/id/MInecraft-

for-Google-Cardboard/)

by coolryan108

How to make Google

Cardboard (/id/How-to-

make-Google-Cardboard/)by Electrify

http://www.instructables.com/id/Make-Google-cardboard-overnight/http://www.instructables.com/id/MInecraft-for-Google-Cardboard/http://www.instructables.com/member/mazzmn/http://www.instructables.com/id/How-to-make-Google-Cardboard/http://www.instructables.com/id/Make-Google-cardboard-overnight/http://www.instructables.com/id/How-to-make-Google-Cardboard/http://www.instructables.com/member/coolryan108/http://www.instructables.com/id/DIY-virtual-reality-3D-glasses/http://www.instructables.com/member/Stojan+Mitric/http://www.instructables.com/id/Make-the-DodoCase-VR-Google-Cardboard-Switch-Work-/http://www.instructables.com/member/dinesh+kumar+c/http://www.instructables.com/id/Make-the-DodoCase-VR-Google-Cardboard-Switch-Work-/http://www.instructables.com/id/MInecraft-for-Google-Cardboard/http://www.instructables.com/id/DIY-virtual-reality-3D-glasses/http://www.instructables.com/member/Electrify/http://www.instructables.com/tag/type-id/?q=


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*In image form

(http://cdn.instructables.com/FX5/HKYB/ICFKPJA6/FX5HKYBICFKPJA6.LARGE.jpg)

(http://cdn.instructables.com/F61/SXUJ/ICFKPJEQ/F61SXUJICFKPJEQ.LARGE.jpg)

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Show All 13 Items

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Step 4: Google Cardboard VR assembly

Assembling Google Cardboard VR

1.Download the templates for free and print in on long bond paper in landscape

mode.

(Link will be provided in some parts of this instructables.)

2.Cutting using scissors and stencil cutter accordingly with the template guides.

3.Attached the templates after cutting on a cardboard.

4.After cutting all the three pages -parts of the templates.,assembling it is quite

not difficult to follow.,as their is a marking on templates where you can fold.

Step 5:

(http://cdn.instructables.com/F19/WKKU/ICFKPJPZ/F19WKKUICFKPJPZ.LARGE.jpg)

(http://cdn.instructables.com/FIZ/75EW/ICFKPK30/FIZ75EWICFKPK30.LARGE.jpg)

(http://cdn.instructables.com/FO0/UQ4P/ICFKPLC9/FO0UQ4PICFKPLC9.LARGE.jpg)

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Show All 8 Items

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Step 6:

Step 7: Sources

Sources:

https://www.google.com/get/cardboard/

https://www.google.com/get/cardboard/get-cardboard/

•VR Apps for iOS

https://itunes.apple.com/ph/app/dive-city-rollercoaster/id771293168?mt=8

Step 8: In Depth Understanding Magnifications

(http://cdn.instructables.com/F21/OO0Q/ICFKPLLQ/F21OO0QICFKPLLQ.LARGE.jpg)

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•Magnification of images

•mag·ni·fi·ca·tion\ˌmag-nә-fә-ˈkā-shәn\

noun

: the act of making something look larger than it is : the act of magnifying

something

: the larger appearance of an object when it is seen through a microscope,

telescope, etc.

•Focal Length

Focal length is the distance from the magnifying lens to the object behind the

lens when the object is in focus. To put it another way, the optimal distance

between the object being magnified (when it is in clear focus) and the

magnifying glass is the focal length.

•Magnification Power

As the magnification power increases, the focal length decreases; conversely,

as the magnification power decreases, the focal length increases. The stronger

the optical power of the magnifying lens, the shorter the required distance

between the magnifier and the object behind the lens.

For example, if you are looking at a diamond through a 10x loupe, the distance

between the diamond and the magnifying loupe will be very small (about an inch

or so away). The focal length is therefore about an inch. Your eye will also need

to be very close to the loupe.

If you are looking at fine print with a 2x hand-held magnifying glass, the

magnifying glass will need be several inches away (roughly 6 to 8 inches) from

the fine print to bring it into optimal focus. The focal length in this example is 6 to

8 inches.

If you are not using a magnifier at its correct focal length, the object you are

viewing will appear out of focus, distorted, or upside down when trying to view it

through the magnifying glass.

•Relationship of Lens Size to Magnification•

Please keep in mind, as the lens size (diameter) of the magnifier lens increases,

the magnification power of the magnifier decreases. As the lens size of the

magnifier lens decreases, the magnification power of the magnifier increases.

This is a result of the amount of curvature in the magnifier (lens). Magnification

power is a result of the amount of curvature in the magnifier lens. As the lens

(http://cdn.instructables.com/FYT/27D2/ICFKPN0V/FYT27D2ICFKPN0V.LARGE.jpg)

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size increases, the amount of curvature in the lens decreases, resulting in lower

magnification power of the lens. As the lens size decreases, the amount of

curvature in the lens increases, resulting in higher magnification power of the

lens. This is why higher magnification lenses are generally smaller in size than

lower magnification lenses.

Step 9: About Magnets

Using MagnetsCAUTION: Messing with powerful magnets near your iPhone can alter the

calibration of the sensor!

In researching this article, we experimented with a number of powerful magnets

near the phone. While the compass can re-calibrate itself, it is possible to mess

it up. In our case, it seems that we might have slightly magnetized some

component inside the phone.

While the compass still seems to work reasonably well, it doesn’t show the same

overall field strength when we twist the phone around in different directions. This

relatively new iPhone did agree with itself before we starting experimenting.

There are a number of stainless steel shields inside an iPhone that might have

been very slightly magnetized by the passing magnets. Hopefully they will

demagnetize over time.

Avoid getting powerful magnets too close to your smartphone, or risk messingwith your own compass calibration. Anything closer than a few inches is stronger

than that sensor can measure anyway.

https://www.kjmagnetics.com/blog.asp?p=iphone-fun

More about magnets

https://www.kjmagnetics.com/blog.asp?p=google-cardboard

Step 10: Google Announcement

Google has announced a new version of Cardboard, its virtual reality viewer.

The latest Cardboard design will fit larger phones, up to 6 inches, and it's gotten

rid of the magnet controller, replacing it with a cardboard button that will work

with every phone. It also takes fewer steps to assemble. Just as importantly,

Google has launched its Cardboard virtual reality app on iOS. The new app will

let iPhone users explore city environments, use a virtual kaleidoscope, and view

3D objects from a museum collection. Until now, the official Cardboard app was

available only on Android, where it has been downloaded over a million times.

For developers that have created their own Cardboard-compatible apps, the

software development kit also supports iOS.

(http://cdn.instructables.com/FJN/GV8L/ICFKPNBW/FJNGV8LICFKPNBW.LARGE.jpg)

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*Google Cardboard is a virtual reality (VR) platform developed by Google for use

with a fold-out cardboard mount for a mobile phone. It is intended as a low-cost

system to encourage interest and development in VR and VR applications.It was

created by David Coz and Damien Henry, Google engineers.

•After initially only supporting Android, Google announced iOS support for the

Unity plugin in May 2015 at the Google I/O 2015 conference.Third-party apps

with Cardboard support are available on the Google Play store and App Store

for iOS.

•Everything about Google Cardboard VR

http://www.techradar.com/news/phone-and-communications/mobile-

phones/google-cardboard-everything-you-need-to-know-1277738

Step 11: Result

(http://cdn.instructables.com/FGR/EK4N/ICFKPNDF/FGREK4NICFKPNDF.LARGE.jpg)

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We have a be nice comment policy.

Please be positive and constructive.

I M ad e it! Ad d Ima ges Ma ke Co mm en t

(/member/rodski/)

5 days ago Reply

flag

(/member/rodski/)

9 days ago Reply

Recycling things up is a good habit.,you are a big help to mother nature plus

you're creating new things out of old.,And thats all of it.,The result of building this

project is fullfilling.,I enjoyed using the virtualization at no cost.Hoping you

enjoyed reading it.,a heart or a vote will be highly appreciated.,Thank you !

rodski (/member/rodski/) (author)

Just build another one,new but same Lens DIY procedures.

(http://cdn.instructables.com/FKK/HIBT/ICO0C0JZ/FKKHIBTICO0C0JZ.LARGE.jpg)


Found a better way,put a washer in between of 2 plastic lens.,for easy

injecting water:,watch out for bubbles in syringe.

(http://cdn.instructables.com/FWW/CRJ5/ICFKPNNY/FWWCRJ5ICFKPNNY.LARGE.jpg)

http://cdn.instructables.com/FWW/CRJ5/ICFKPNNY/FWWCRJ5ICFKPNNY.LARGE.jpghttp://www.instructables.com/member/rodski/http://www.instructables.com/member/rodski/http://www.instructables.com/member/rodski/http://www.instructables.com/member/rodski/http://cdn.instructables.com/FKK/HIBT/ICO0C0JZ/FKKHIBTICO0C0JZ.LARGE.jpg


10/11

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Creative_Guy (/member/Creative_Guy/)

Cool! I'll try someday..

GWPoulos (/member/GWPoulos/)

Why cant you just use a pair of cheap reading glasses for the lenses?

Something around +2 diopters, depending on your eyesight and the distance

between your eyes and the screen.

Creative_Guy (/member/Creative_Guy/) GWPoulos

Your eyes will broke


@GWPoulos

As i mentioned in introduction,the idea is to create a google cardboard VR by

using scrap materials.,And i dont think your idea of using ordinary eye lenses

will work.,it's a negative meniscus lenses.

while 2 Biconvex lenses paralled to 2 images create a 3D effect when held up

to your eyes at focal length of 45 mm.It combines 2 images in one image that

creates 3D effect and Ordinary lenses will not.(imo)

But maybe it might work too with plano convex lens.Thanks for your

suggestion.


@kondzio29

Thanks a lot!


@pucksurfer

Glad you like it.,Thank you!

kondzio29 (/member/kondzio29/)

Great instructable! Really well explained!

pucksurfer (/member/pucksurfer/)

That's pretty awesome! Super cool that you could make the lenses yourself

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Documents

DIY Lens for Google Cardboard VR