Must see! Free Light Shaping Diffuser.

hey car3o

I have a big question. I cracked a motorola lcd and gotten three diffrent strips. which one do i use?

there is one with has a holgraphic banding when looked thru a light source.
another one that looks like a diffuser - i think this is the one!!
and another one which looks like the other one but more richer in grain and more light lost.

which one do you think it is?

phally
 
Perhaps LCD screens that are rated to be brighter with better contrast ratios have better diffuser screens, but the converse could also be true. Skimp on one component in the chain, and make up for it with another component of higher quality somewhere else in the design.

Anyway, I REALLY like the bokeh of this screen. Are yours as easily scratched as mine is?
 
phally said:
hey car3o

I have a big question. I cracked a motorola lcd and gotten three diffrent strips. which one do i use?

there is one with has a holgraphic banding when looked thru a light source.
another one that looks like a diffuser - i think this is the one!!
and another one which looks like the other one but more richer in grain and more light lost.

which one do you think it is?

phally
Click to expand...



My guess is the one which is whitish in color.
 
Great find,
Wish I had known this earlier, I go through at least 4 phones a semester,
Fires, pool partys, loss, and the every present crunchy foot. I'll have to dig around and see if I can find any intact to play with.

Would these be present on older crt monitors? I do not have an adaptor at the moment (that's next on the list) but if I get a large enough screen to test beforehand all the better.

I might build a mattebox or such with slots to hold these things, if I do I'll post..
 
I was searching around and I found this on the PSP. The screen in the middle
looks like the diffuser we need.

111805%20144.jpg
 
hmm might try buy some broken game systems or phones from a guy I know in St. Chuck, sounds like a good holiday project.
 
phally said:
hey car3o

I have a big question. I cracked a motorola lcd and gotten three diffrent strips. which one do i use?

there is one with has a holgraphic banding when looked thru a light source.
another one that looks like a diffuser - i think this is the one!!
and another one which looks like the other one but more richer in grain and more light lost.

which one do you think it is?

phally
Click to expand...
This is the easiest way to tell if you have the right screen.

http://i57.photobucket.com/albums/g240/Car3o/Clear.jpg
http://i57.photobucket.com/albums/g240/Car3o/blury.jpg

Hope that helps.
 
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wjm said:
Perhaps LCD screens that are rated to be brighter with better contrast ratios have better diffuser screens, but the converse could also be true. Skimp on one component in the chain, and make up for it with another component of higher quality somewhere else in the design.

Anyway, I REALLY like the bokeh of this screen. Are yours as easily scratched as mine is?
Click to expand...

I was thinking that. But I'm wondering if like the higher the resolution the less light you have because the bigger the screen. Say a 20inch monitor with a high resolution, could lead to bigger/thicker material. Who knows.

Mine haven't scratched yet. I did take out a new one from a Nextel phone and it was ran over. I think there was one tiny scratch, but haven't put it in my adapter to find out if you can see it. I've had good luck I suppose. I'd say be extra careful when taking it out.

I got the motors in today and hopefully, hopefully I'll get the battery holder and switches in tomorrow. Did you solder any of your vibrating or use clips?
 
I am going to do a 3-step process for attaching the motor wires:

1: Light solder
2: Superglue the joint for rigidity
3. Hot glue the red and black wires together (ensuring there is NO metal contact) to reduce the possibility of accidental shorting during use.

We'll see how that goes. The motor vibrations really wreak havoc on the soldered joints - I have had to resolder many times during the construction phase.
 
 
Very interesting results. I'm excited to see something shot in more light. Thanks for posting these up. There still seems to be some sort of grain visible, but I'm not quite sure from the screen shots. I'd love to see some actual video from this. I'm willing to donate webspace/bandwidth for an uncompressed clip.
 
Hi guys, it’s been a while since I’ve been here and I just came visiting and saw this thread.

Before I put my DOF adapter research aside a few months ago, I tested light shaping holographic diffuser sheets from a few suppliers (at great cost) with angles of 20 and 30 degrees, both in a vibrating and spinning adapter.

My conclusion was that the diffusers from these suppliers, at these angles, were unusable in a static or vibrating adapter. They only work OK in a spinning adapter and still you may see very subtle rotational grain in certain shots (against a blue sky).

It’s too bad, because in all cases, I thought the bokey was excellent.

It would be interesting to know the specs (diffusion angle) of the materials you guys are using.

Cheers
 
pertri63, what were the thicknesses of the sheets you have tested?
When you say 'unusable' do you mean the grain is just too large to
eliminate?

Car3o, I'd love to see some video of the screen in your vib setup!
 
Inexistence said:
pertri63, what were the thicknesses of the sheets you have tested?
When you say 'unusable' do you mean the grain is just too large to
eliminate?

Car3o, I'd love to see some video of the screen in your vib setup!
Click to expand...
Edit: Here you go. Mine and my roommates dog.
I'm going to re-encode the dog file to .mov with less compression
Edit: Here is the footage I shot lastnight/tonight. Now. I'm guessing you'll say there is too much grain. That's because I guess you can see it. But to me it looks great. I'm satisfied with the amount of grain it gives off. I dunno, to me. I haven't seen any footage at full resolution and in these kind of conditions to fully see what kind of grain there is from other adapters. I'll try some other screens to see what else there is. I hope this helps you out. I'm recoding the dog footage right now and might have it up before I go to bed. You have 7days to d/l this file, after that it will automatically be deleted

http://filelodge.bolt.com/anonget.php?key=ab188efb73963f468ed602be0c98f549
So I'm uploading footage now. I put the video bitrate up to 1550mb/sec so it should be decent enough to get an idea. I'll have more footage later tonight, after editing, and it's with a lot of people, indoors, and out at night. The footage from today with the dogs was grainy. But for me, you guys are incredibly picky, it wasn't enough to say "wow, look at that grain". You can mainly see the grain on blacks than anything else I.E. dog fur, rooftops, shadows. Also, another problem I ran into was the battery was not at it's full juice. I know tonight the footage appeared sharper with no grain with a new battery. If I can stay awake I'll post that up later, probably tomorrow morning.

Two things. The larger your sheet the more horrible the grain is, and I mean really bad. I thought larger phones, with bigger screens would be better. It isn't. I got ahold of two Nextel i870's and it's just really really bad. Stick to smaller brighter screens.

20 and 30degree isn't the way to go to begin with. I'd say 20 has good results, but I think 15 is even better. I'd like to know as to what angle these screens are as well. I'm not sure if there's a way to tell.

The point to all of this is DIY. You don't have to spend 110.00 on Holographic Diffuser. And if you get great results, you win. If you get bad results, you still win because you didn't drop 110.00 on a piece of garbage. Look forward to some grabs from the video I shot tonight and video from what I shot earlier today.

Ohh yeah. I have a new screen I will test out tonight. If it's good enough, I'll let you in on what it is. It appears to be brighter with less grain the the HGD.

-Rh
 
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The sheets I used were 0.010" if I recall.

I don’t think one can say in absolute terms that a specific angle is the way to go, because the same angle from two different suppliers will give different results in terms of bokeh and light loss (different manufacturing processes).

The higher the angle (more diffusion), the higher the light loss, but the "better" the bokeh and the smaller the grain.

I would have liked to test a 15 degrees sheet, but it was not readily available.
 
.25mm? That's pretty thin but, maybe just too thick for our purposes since .05-.08mm
seems to be a sweet spot for wax thickness.
 
That’s the thickness of the sheet, not of the diffusing "surface" (I don’t know what else to call it). The grainy surface on the materials I tried that actually diffuses light is thinner, so it’s difficult to compare it to wax.
 
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