Virtual reality glasses with their hands: EVA + PVC

A guglovtsy done! So cheaply and effectively promote virtual reality still need to be able to.
And demonstrates quite effectively.
But many of these cardboard glasses are also provocative. And we Matthew (son of 4, 5 years) among them.
Seeing this divays, we are almost in unison said, "Yes, we do steeper!»

In the original confused a few things:

fragility and the fragility of the structure. Cardboard tends to wrinkle, fray at the edges and getting dirty.
Lenses. The small diameter of 25 mm. Very noticeable distortion at the edges of the image and powerful chromatic aberration there.
The lack of "sword belt" for the skull.
The most important thing in the device of course the lens. This is the first of what we are thinking.

Classic stationery magnifying glasses have the same "disease" that Google and lenses, but I was not able to compromise with market conditions.
It's almost despaired when I was lucky. Ventured to call in the State Optical Institute Vavilov.
This modal enterprise engaged in optics for our defense. Located on Vasilevsky Island, St. Petersburg. (Contacts ladies in PM).
Explained to me that ideally must be received 2 chic aspherical lens: 35 mm diameter fused from two, and even enlightened.
Distortion at the edges virtually none. They are glued to some mega-optical sight for Steven Seagal our, but something was not grown together and they remained without waiting in the wings. This hour I found myself.
Half done - the rest is a matter of technique.

The next challenge, though simpler, but also not unimportant - the basic material.
It should be easy enough that would not inflate the neck like Schwartz, and strong enough to hold that the geometry of the structure.
Cardboard immediately swept aside.
Polycarbonate is transparent and has very sharp edges that absolutely can not be ignored - or the person will like Seal, a famous singer. With polycarbonate we dealt when doing mega-feeder for the birds.

In my presentation turned out to be an ideal material ethylene vinyl acetate (EVA). This lightweight foam, plastic, soft and easy to process.
Because it makes the soles of sneakers beach, lodgements for the equipment in the box, heated floors for children's rooms or gyms.
Foam mats for hiking and fitness do not roll - too soft.
But finding the EVA on sale was not so easy. In the neighboring building shops warm floor gets only with children's puzzles, cut out in the center of the tile, which in no way fit into the Technical requirements.

Thirst to start work immediately pushed me to buy a polystyrene substrate under the laminate (blue in the photo with the lens).

It is hard enough for our problem and has a number of advantages over cardboard. The sheet thickness of 5 mm. Very easy to cut kantsnozhom.

To build a building used scotch increased fixation (metallic colors). This Scotch is more convenient packaging - it is softer, forgiving and allows you to re-stick several times. And hold on tight.
Polystyrene was born the first version points. They quite successfully coped with the task, but die with lenses look very untidy and interpupillary distance regulated rude and not gracefully.

I almost fought his perfectionism and almost stop there.
But, again, by chance, my hand gets 1 soft tile floor increased rigidity of 13 mm.
13 - much would be enough, and 10 for the eyes, but must be content available. The front side is not as porous and back ends.

The second version was supposed to look much tidier and have a comfortable interpupillary distance adjustment - otherwise his wife and son will see double image. And adjustments must prishodit without zalapyvaniya fatty fingers gently stёklyshek.

Matthew is very approvingly meets all technical projects for which we are taking with him.
But this he met what is called "a fanfare and tossing bonnets to express sincere jubilation" after briefly explained to him that this virtual reality and what it shows.
It is worth noting that he, for whatever their reasons, did not agree with the common name, and continues to call her real virtuality. And to some extent it is in its own right. I did not indulge him in a debate on this issue.

Since I have an exclusive lens, then any available network patterns were not good.
In Corele born chertezhik, details are printed on paper and awl prick materials and stationery were cut with a knife.

Each of the lenses was decided to firmly anchor (glue gun) in his own die from PVC sheet (1mm). We have dice protruding parts - it is expelled through the slot side wall and that it we will move the lens to adjust the interpupillary distance. Who will do the same, do it in the middle rather than at the bottom.

As a guide for sliding the lens I took in auto parts rubber U-shaped profile to protect the edges of sheet materials. His section of 10x4 mm, 1 mm slot perfect fit under 1mm PVC.

Dies lenses are not able to block all the interior space and in order to hide all this lasciviousness, in the foreground should be placed in a neat, fixed in place, the entire width of the plate divays. With slots for lenses and beak.
To this decorative plates need a separate guide.

To connect the parts fit perfectly 3M double-sided tape for electronic components. I glued them to the new touchscreens, regular breakable beloved wife, oyfona.

Measure out and cut the desired length guides. First 3mm tape sklivaem 2 guides among themselves - the side walls. And then sticking in place already paired.

EVA is still good and the fact that at the stage of fitting parts can baits for sewing pins. Excellent hold. Stick them not perpendicular to the surface, but at an angle, alternating slopes - keeps an order of magnitude stronger.
By the way, this method is suitable for mounting straps "sword belts" in parts of the EVA. Bite head pins and countersunk end - it will generally not noticeable.

When fitting, try to place the lens as close as possible to the eyes. By the focal length is not affected, but the wider viewing angle, the smaller the distance from the eye to the lens.

Selection of focal length - between the lenses and display - done purely experimental.
Tip: Do not use in the selection of 3D video or just your desktop smartphone. They may not be enough to catch the perfect picture clarity. Video dynamically razmyleno and has no static parts where you can catch the focus, and the desktop does not have a separate channel for each eye. What you see pixels - enough.
It is necessary to check for any application modeling BP and having a small text interface. There was originally a perfect focus. I used «Titans of Space for ...»

Markings on the cut parts, fasten and fix.

PVC under the lens I was white and did not fit in Style. Without thinking, I painted it black marker with a wide (10mm) sting. What then regretted. As it turned out, he was not as resistant to moisture released my bread slicer in the mask and where my nose is in contact with the painted surface, it remained traces of radical black. And since it was discovered after the final assembly and the return trip was not, had to urgently do a support for a bridge from scrap rubber profile. Look terrible - they'll remodel.

Since the layout to fit the own face, it ideally adapts to the face and long-term use was seen fogging lenses. I had to make the vents on the bottom and top walls.

Front wall did not flip, unlike the first version of the score. So I do not need the versatility of the entire zoo smartphones, customized size for SG4. And just in case. Lateral sides of the gap. Do not forget to make a groove for the side buttons Smart.

I'll have details shlifanut ends - to remove irregularities.

Though it looks monumental, but the glasses are easy. Evening weighed. With shoulder strap Weight: 251 g

Magnet has not yet made - not found a suitable round rare earth.

In search of solutions addressed to Matthew asking to borrow magnets from his old hard drive, which he regularly assembled / disassembled with Electroscrew. He went to meet and magnets were removed.
They were nemeryanoe force, but, alas, had the shape of a boomerang and, therefore, distinct poles. And they behave is not quite as it is required.
How to find - screwed.

As a result, the whole family happy. Wife - spectacle. We Matthew - a very exciting experience.

Source: geektimes.ru/post/249278/