Triple Screen Fresnel Lens Display for $220

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Re: Triple Screen Fresnel Lens Display for $220

Postby yokoyoko » Thu 1. Nov 2012, 20:30

this is the best i can do at the moment. A one handed lap in iracing.

The gaps you see are not to see in reality. This comes because of the camera has just one lense and the not matching distance for filming.

Best regards
yoko
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Re: Triple Screen Fresnel Lens Display for $220

Postby prodigy » Thu 1. Nov 2012, 22:07

I didn't quite understand what kind of effect those magnified lenses are making? They make bigger FOV? Or smaller, like some kind of zoom, bringing the picture directly in front of you? It looks really good, pretty real.
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Re: Triple Screen Fresnel Lens Display for $220

Postby yokoyoko » Thu 1. Nov 2012, 22:20

http://en.m.wikipedia.org/wiki/Fresnel_lens

If you sit 500mm away the lense makes a ~ 30inch screen out of a cheaper 19inch screen. + you have the effect of a cars windscreen!
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Re: Triple Screen Fresnel Lens Display for $220

Postby ferslash » Thu 1. Nov 2012, 23:01

wooow, just tremendous! >D grate! no words... looks grate!!!

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Re: Triple Screen Fresnel Lens Display for $220

Postby prodigy » Thu 1. Nov 2012, 23:05

And what's the quality of the view? Is it sharp or a bit blurry because of magnifying?
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Re: Triple Screen Fresnel Lens Display for $220

Postby yokoyoko » Thu 1. Nov 2012, 23:23

I got a bit of a view fetish - I watch at home on an Epson TW9000 Projector (which is hard to top) and think the view with the lenses is quiet good (really sharp - just if you have to much light in the room, the lens can be a bit reflecting (notebooklike)). You have to mention the price! If you want to do something like this without the lenses the price is minimum factor x3 ! Or you wait until sirnoname has his new Oculus Rift and can give some feedback. If this thing is half as good as I think - then this is the way to go in future.

Until I'm pleased with my 200€ triple screen.
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Re: Triple Screen Fresnel Lens Display for $220

Postby Turn » Fri 2. Nov 2012, 01:00

yoko - I'm so glad that you're happy with it too! I had no idea you were considering building one. It sounds like you've got it solid enough for motion too, so that's good. Now you know what I mean when I say you get much more than you pay for, right? :)

My youtube video was shot of a replay of my iRacing lap; not as I actually drove it ;) That way you can position the camera exactly where your eyes would normally be, and pivot it like your neck to simulate the effect of the screen gaps, etc.

Yes, playing with the distances, bezel offsets, etc. was the HARDEST part for me too. A half a cm here, a half cm there... The problem is what I call the "binocular" effect of having two eyes. Each eye sees the edge where the lenses meet from two slightly different angles. And since the monitors are a certain distance beyond that point each eye sees either different amounts of bezel, or different amounts of a slice of the two adjacent monitors combined together. Which of these two scenarios you prefer depends on how you position things. Neither is, unfortunately, ideal. HOWEVER, when you're flying around a corner, tires screeching, barely holding the car on the razor's edge....believe me, you don't notice it at all :) The overall effect....takes my breath away, really it does.

It's great you're coming up with a guide. Nothing would make me happier than for others to share in this too, so anything that helps is a good thing. Beyond certain rules which should not be broken (I've already outlined most of them in my first post and videos), there are a few correct ways to implement this design. The variations are either: "with gaps and no overlapping image", or "bezeless and with overlap". I prefer the second way, myself. I'm impressed you were brave enough to use solid aluminum mounts. I was forever sliding, adjusting, angling and tilting mine around until I was happy.

@prodigy: This system does more than just magnify. It moves the focal plane out several feet away from you, so it feels like you're actually "looking down the track" instead of at a "painting" of a track a couple feet away from you (the computer screen) and has an effect inside your brain which is quite interesting. This is the part that no 2D video can show you. That, combined with the magnified FOV, and smaller effective bezels, is what makes the overall effect fairly immersive.

I looked up "immersive" on dictionary.reference.com....which I want to share because it might make you guys laugh too:
"
immersive

im·mers·ive [ih-mur-siv]
adjective
noting or pertaining to digital technology or images that deeply involve one's senses and may create an altered mental state: immersive media; immersive 3-D environments.
"

An altered mental state is, afterall, what we seem to be after here. :D
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Re: Triple Screen Fresnel Lens Display for $220

Postby yokoyoko » Fri 2. Nov 2012, 11:29

yoko - I'm so glad that you're happy with it too! I had no idea you were considering building one.


Hi Turn my clever buddy :-) - happy is the wrong word -> impressed is better! sry I just forgot to mention the building before... to much things running atm.

It sounds like you've got it solid enough for motion too, so that's good
If you build it the right way this is solid enough for motion (even for alot of motion). The traction loss modul has to carry about 15kg more but if you haven't driven the sim a lot before you would not notice (the bit more inertia).

Now you know what I mean when I say you get much more than you pay for, right?
you got no idea how much i love this screen's! If someone would say this cost about 1000€ it is even worth every penny in my opinion because:

This system does more than just magnify. It moves the focal plane out several feet away from you, so it feels like you're actually "looking down the track" instead of at a "painting" of a track a couple feet away from you (the computer screen) and has an effect inside your brain which is quite interesting. This is the part that no 2D video can show you. That, combined with the magnified FOV, and smaller effective bezels, is what makes the overall effect fairly immersive.


this fits perfectly!

The problem is what I call the "binocular" effect of having two eyes. Each eye sees the edge where the lenses meet from two slightly different angles. And since the monitors are a certain distance beyond that point each eye sees either different amounts of bezel, or different amounts of a slice of the two adjacent monitors combined together. Which of these two scenarios you prefer depends on how you position things. Neither is, unfortunately, ideal. HOWEVER, when you're flying around a corner, tires screeching, barely holding the car on the razor's edge....believe me, you don't notice it at all :) The overall effect....takes my breath away, really it does.

very good described - much better than I could with my school english.

My youtube video was shot of a replay of my iRacing lap; not as I actually drove it ;) That way you can position the camera exactly where your eyes would normally be, and pivot it like your neck to simulate the effect of the screen gaps, etc.
now i feel like an idiot... good idea muhahahaa :D


It's great you're coming up with a guide. Nothing would make me happier than for others to share in this too, so anything that helps is a good thing.
you understood me wrong I guess. The guide should show how to build my motion rig (without triple screen).
In first step - the seatmover setup
in second step - how to add the traction loss
perhaps in third - how to build your own load cell pedals
...................- how to do this with the monitors

But I think your describtion above is good enough to build something like this easily!!!

Best regards
yoko
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Re: Triple Screen Fresnel Lens Display for $220

Postby ericRacer » Thu 7. Feb 2013, 04:10

prodigy wrote:I didn't quite understand what kind of effect those magnified lenses are making? They make bigger FOV? Or smaller, like some kind of zoom, bringing the picture directly in front of you? It looks really good, pretty real.



I built my own too and it is for adding a deep cue like a real flight simulator with collimated display :o

http://www.mikesflightdeck.com/scenery_ ... ation.html

it is fantastic ! :P
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Re: Triple Screen Fresnel Lens Display for $220

Postby Turn » Wed 1. May 2013, 21:48

ericRacer,

Do you have any pics/video of your display setup?

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