Look like they are trying something similar
Ok. I have to de-lurk now.
I just pulled a couple of frezzies out of an old DIY projector to do some experimenting...
Well... this works much better than I thought it might!!
The screen is a 8" PL8006. My good fresnel is 280mm focal and is just a bit larger than the lcd.
Seems that having the fresnel at 160mm from the screen gives the best viewing experience. (maybe half the fresnel focal?)
Head position ISN'T critical at all (this is good!) but you need to be close enough to fit the whole image in the lens. 5-30cm in this case.
Basically the overall effect is like having a larger screen further back, which is exactly what we need for maximal immersion. Same as what goggles do, but for those of us that are allergic this is great alternative
I tried the shorter fresnel (160mm focal, not the best quality) and found this gives the same sort of viewing experience as the rcv922 fatsharks. (minus the blurry corners) Very intense, but quite tiring. Also need to be much closer to the lens to get the whole image.
The diy projector sites (if they're still around) probably have some good info on where to get nice fresnels (allinbox, lumenlab, ??). I've seen 3DLens mentioned here and there...
Anyway this should give the gist:
Nice.... I was about to try this on the 7" monitor that Tim@RMRC sells.
....but the 3.5" with the magnifyer looks great, and much lighter in weight.
Does anyone know a 3.5" that doesn't goto blue screen?
thanks for posting:-)
Here is the rig I referred to earlier in the thread. Huge field of view ~90deg. Great illusion of depth. I started out with a cheap page magnifier from one of the local retailers and it looked good but I noticed you could see the lines of the fresnel lens. I would recommend upgrading the lens to a higher line count unit such as the A260 from 3Dlens.com for a clearer, sharper, line free image. I've really enjoyed the comfort and FOV on this vs my new Dominators. The dominators are completely portable and wireless though. Always a tradeoff.
Here is the part list and a few pics in case someone wants to build a medium size unit.
- Haer 10" LCD, video RX
- Coroplast body
- Fresnel lens cut to size
- Cheap silicon safety goggles
- a little weather stripping to hold the lens
- square dowels to form a wooden frame to slip over the screen
- velcro, silicon sealant, CA
Last edited by imagebuff; 28th April 2012 at 10:10 AM.
Sweet. I bet that works really well. The A260 is probably a good compromise for focal length too.
I'm totally psyched to rebuild my GS around this kind of display
Have you guys seen this vid from RCModelReviews? He's building up a wicked set of video goggles with two 3.5" LCDs, a set of reading glasses, and a weird stereoscope thing that splits your IPD. Can be used for 3D easily as well.
View this video on YouTube
The eye spreading thingy is quite interesting , will look out for the next installment.
By the way at 7.06 on the video, i think he lets one go (know what i mean) :-)
Thanks for the PM's. but when i have responded, there seems to be a problem with the "mail delivery subsystem". Anyway, anyone who requires a test EPP unit (just the epp part) please email me with your address, im only charging for shipping, the unit is free to fpvlab members.
emails to email@example.com ref eco goggles