Reddit reviews American Educational Unmounted Double-Convex Lens with Ground Edges, 38mm Diameter, 5cm Focal Length (Bundle of 5)
We found 4 Reddit comments about American Educational Unmounted Double-Convex Lens with Ground Edges, 38mm Diameter, 5cm Focal Length (Bundle of 5). Here are the top ones, ranked by their Reddit score.
Double-convex lens for demonstrating optical principlesTwo outwardly curved surfaces converge light rays to a pointPositive focal length of 5cm38mm in diameterLens is unmounted and has ground edges
I built my own cardboard and these are the lenses I used, $1.77 each. I have a cardboard from a kit as well and the lenses from amazon are much, much nicer. I'd guess that in bulk the lenses in a cardboard kit cost less than $0.50 each. It makes this report seem a little bit less credible.
Oh dang! I went to bed shortly after this and wake up to find a bunch of comments!
Alright for the curious yes, it does work and it's in focus despite the very cruddy looking hot glue job. Believe me I was surprised. It goes to show that basic VR is not hard though and now is really the right time to refine this tech.
This is a cellphone DIY job so I can slide in my Nexus 5. The annoying thing was having to carve out places for the buttons so the damn thing wouldn't reboot or change volume when I put it in. I'm probably going to post a bit about how I did it on Tumblr after a couple more additions (blinders, strap) but the construction was about 75℅ luck! The height of the box? Already fits my Nexus 5 perfectly. The distance between the back of the box and the end where I cut the side pieces? Exactly where I needed the lenses to be to focus (about 3-4cm).
Now that I know how easy this can actually be to achieve I'm probably going to give it a second try with 3D printed parts.
These are the lenses I got by the way. I found them thanks to NyxAither's reply in another DIY Rift thread.
It's working pretty well. The Tuscany demo is on the Play Store for free so I started with that and even at 20fps it looks good. The frame is just foam core poster board and hot glue and these are the lenses I used: http://www.amazon.com/gp/product/B008FRFV4K/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
Here are some links for the product in the above comment for different countries:
Amazon Smile Link: on amazon
|Country|Link|Charity Links|
|:-----------|:------------|:------------|
|USA|smile.amazon.com|EFF|
To help add charity links, please have a look at this thread.
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