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Re: Compact 180 deg fov HMD's still possible?
Posted: Mon Mar 14, 2016 9:33 pm
by WiredEarp
A little OT, but its interesting to see that 3d printing apparently is now a viable way of creating lenses, as in
http://www.luxexcel.com/
or
http://www.edmundoptics.com/products/se ... ed-optics/
If lenses can be done, I wonder if custom mirrors can also be created now using 3d printing type methods?
Re: Compact 180 deg fov HMD's still possible?
Posted: Tue Mar 15, 2016 4:27 pm
by 3dpmaster
Subject: Compact 180 deg fov HMD's still possible?
Hello WiredEarp,
It is kind to send this information but I had just enough money to buy blocks of acrylic of 2 inches thick and other stuff like a powerfull router with the cutting tools. Hopefully, I could show the final result if the machine is ready to use. The machine that I've been using until now was extremely rude for fine machining and I could not have the proper optical result, there was too much vibration from this wooden machine. Wood is not so stable.
About Edmund-optics: I usually buy from EO but for custom build I have to pay the price! ... And if it is not the optics that you really want ......
I'll keep it up to date
Re: Compact 180 deg fov HMD's still possible?
Posted: Tue Mar 15, 2016 4:28 pm
by 3dpmaster
piecutter wrote:Very interesting. Seems we've been following a similar path, you and I. Only I began physically testing with Microvision laser projector, but found them too bright! And also added bulk that the original plan was meant to do away with, so now I'm back to using micro displays out of an HMZ. I'm looking into fixing the brightness problem by overdriving them and using a more efficient heatsink than the ones they came with, which shouldn't be to hard as the originals barely do anything. I'm actually 3D printing bezels to hold the displays and heatsinks now.
Also on the to do list, extensions for the ribbon cables (any input appreciated) and a more open source driver board, if possible. Going to need a little help figuring out that one, as I'm a few notches below EE status.
The long term plan is to have a proof of concept with this and then reiterate with the Sony 1080p displays of the same size. They're a bit more difficult to lay hands on as you can't just cheaply buy something off the shelf and pull them out of it, but I have a source that's willing if I pony up for more than I need. Maybe a group purchase if I can find enough interest.
Hope to hear something good from your latest grinding endeavor!
Thanks,
I'll keep it up to date
Re: Compact 180 deg fov HMD's still possible?
Posted: Fri Nov 08, 2019 9:24 am
by 3dpmaster
new link,
For the lenses, putting optical manifacturing to another level:
https://www.mtbs3d.com/phpbb/viewtopic. ... 87#p165987
Re: Compact 180 deg fov HMD's still possible?
Posted: Fri Nov 22, 2019 2:26 pm
by 3dpmaster
I've tested my machine and it works very well. While spinning the cylindrical plexiglas blank, the Router index arm stays steady, although it took a long time per layer to feed a 200 mm lens (78,7 inch). I was able achive my first working monoscope which acts like a close-up telescope, focal point is only 25 cm (9.8 inch). The monoscope has 8 lenses in total. 5 large pmma lenses (homemade) and 3 small closeup filters (purchased). The fov of the monoscope is 145 degrees! and throws a sharp image from center to borders because of the intermediate image plane. The intermediate image plane is essential for better image quality. Bulky but it is first step before manufacturing smaller and wearable optics. Fitting this property onto a compact 180 deg hmd, it seems to be promising. Stay tuned.
Greetings
Re: Compact 180 deg fov HMD's still possible?
Posted: Fri Nov 22, 2019 2:40 pm
by 3dpmaster
145 deg fov second lens (eyepiece part)
Re: Compact 180 deg fov HMD's still possible?
Posted: Wed Jan 22, 2020 5:53 pm
by Hannibalj2
Just how big are those? They look huge!
Re: Compact 180 deg fov HMD's still possible?
Posted: Thu Jan 23, 2020 1:58 pm
by 3dpmaster
Hi Hannibalj2,
The biggest lens is 7,8 inch (20 cm). It was used to test the precision of the machine and it's really a beauty. I cannot wait to go a step further (19,3 inch or 50 cm diameter). But the most essential task is to manufacture freeform optics, molds for curved mirrors etc. Without the machine I cannot make any optics needed for the ultimate compact 180 deg hmd. Fingers crossed.
Greetings
3dpmaster
Re: Compact 180 deg fov HMD's still possible?
Posted: Thu Aug 05, 2021 12:53 pm
by 3dpmaster
corona and personal issues pushed me to pospone the project. Everything is on paper, machine is lined up. Now it is only a matter of time to get things done. My apologies for this long delay.
Re: Compact 180 deg fov HMD's still possible?
Posted: Wed Jun 14, 2023 11:48 am
by 3dpmaster
Hello Tomass99,
because of someone of my family passed away and time management issues I will soon update the different possibilities for FULL FOV with optics without too much image quality loss. Meanwhile every vr attention goes to Meta and Apple which is a good thing. Vr is still developing for the masses. Currently I educated myself in cast mirror, diamond turning and achromatic polymer materials. Thanks for your interest and for replying.