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Old December 1st, 2006, 01:21 PM   #1
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Free Holographic Diffuser. Must See!!

Hello all. Since no one took up my offer to buy a light shaping diffuser from Edmund I ventured out and thought I would see how I could obtain one without paying any money. So thanks man. But in all, that was a great thing. I spent a lot of time asking for samples and never was I able to get a hold of one because they still charged money. Bastards. That's okay to. I then googled up Holographic Diffusers. And that changed it all. There was an article about a company who makes these and just so happens they went into great detail just exactly what Holographic Diffusers are for. Just so happens they are in every lcd screen there is. Nice. 40% of the market used for Holographic Diffusers are in cell phones. I have like 30 cell phones that break every other month and thought what the eff. I took one apart and low and behold there it was $150.00 Holographic Diffuser. Now I have no idea what angle this is, but I did some bokeh tests and they turned out great. The light loss is incredible. I will have screen caps of this later with more available shots. Yes the grain is awful, and only to be used for a vibrating-spinning adapter. I've gone one here, just waiting for the motors. Here is what I had to do with my phone and then the diffuser. This picture if from the front lcd. I had the bigger one in my adapter already. Hope you guys enjoy. If you have any questions, I'm sure I can help.

http://i57.photobucket.com/albums/g240/Car3o/Phone.jpg
http://i57.photobucket.com/albums/g2...o/Diffuser.jpg

Last edited by Rich Hibner; December 1st, 2006 at 04:35 PM.
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Old December 1st, 2006, 01:48 PM   #2
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Rich,

Im very interested to see where this goes, I love new experiments with ideas.

The second image does not work...
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Old December 1st, 2006, 02:16 PM   #3
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Yeah I've done this before.

I pulled em out of cell phone, old LCD screens, etc.

I also got 5 sheets for free from GE Engineering division. Only thing is I never got a round to actually building the 35mm adapter =P

They seem to work fairly well...
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Old December 1st, 2006, 02:46 PM   #4
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Image 2 is same link as the first, just change the .jpg name from Phone to Diffuser
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Old December 1st, 2006, 02:50 PM   #5
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http://i57.photobucket.com/albums/g2...o/Diffuser.jpg
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Old December 1st, 2006, 04:54 PM   #6
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Just what does it do?

Is it a replacement for a ground glass? What's the advantages?
Any drawbacks?

thanks
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Old December 1st, 2006, 05:31 PM   #7
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Here are some grabs from the screen. The light loss isn't what I thought it would be. There's definitely light loss. But on the good side, the bokeh is quite impressive. You can see for yourself.



http://i57.photobucket.com/albums/g2.../NoAdapter.jpg

http://i57.photobucket.com/albums/g2...o/Adapter2.jpg

http://i57.photobucket.com/albums/g240/Car3o/Bokeh3.jpg

http://i57.photobucket.com/albums/g240/Car3o/Bokeh2.jpg

http://i57.photobucket.com/albums/g240/Car3o/Bokeh.jpg

http://i57.photobucket.com/albums/g2...o/Bokeh4-1.jpg



Can't wait until it's vibrating.

-Rh
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Old December 2nd, 2006, 12:47 AM   #8
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From the looks of things, the light loss is a good trade off for the good bokeh, and the lack of vignetting or hot spot. Once you get that thing vibrating we'll see what this thing can really do.
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Old December 2nd, 2006, 11:55 AM   #10
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I think it has a nice filmic look to it, lots of crushed black, it might be a good look if you want a certain look...
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Old December 2nd, 2006, 03:09 PM   #11
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Do you think we can see some actual video? I'm interested in how that static grain looks.

Those stills look very good. There doesn't seem to be any big problems with it except for the grain which should go way when you get it vibrating. What is your design for the vibrating diffuser like?
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Old December 2nd, 2006, 09:59 PM   #12
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Hi Chris,

see my homepage for the vibrating design. Besides the tutorials I have some vibrating gg-assemblies that works with any diffusor. They are also custom made for each tube diameter.

Daniel
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Old December 2nd, 2006, 10:36 PM   #13
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Consumed in the curiosity that this thread has sparked in me, I took a holographic diffuser out of my old canon elura 40 (been broken beyond repair for years, I figured I should finally lay it to rest), and stuck it into a system which I ghetto rigged today.

3 Closeup Filters -> UV Filter -> Diffuser -> UV Filter All encased in some teflon tape to force fit it into the PVC pipe. I used the rear lens cap trick on a piece of threaded PVC which screws right into the end of the thing to mount the lens.

http://www.fmpfilms.com/35/PVC1.JPG
http://www.fmpfilms.com/35/PVC2.JPG

Tomorrow should be a nice day, maybe I'll bring it outside and see what it can do. From the look of things it's pretty good. the light loss isn't as bad as some other things that i've tried. the grain is pretty bad but I'll probably upgrade to a vibrating unit.
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Old December 3rd, 2006, 01:50 AM   #14
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Edit: I added the less compressed of the 2nd video. It's 40something mb's. It's the 3rd link.

Here is video 1 of 2. The other is uploading now. The first one is around 22mb's and the second one around 31. I'll be honest, so no one is fooled. I'll have to re-up the second clip because the compression, even though it's full, took out most of the grain. You can still see it, but it's not like it should be. I'll re-up but it'll be more around 40mb's or more. That's a while to upload, so it will definitely be tomorrow. You can still check it out. As you can kind of tell it was raining outside. The sun is gone and it's overcast. So the light loss isn't that bad to be honest. I don't have a polarizer and I used 1/18th ND filter. Also had to adjust the iris. The bokeh is crazy good. Just look at the first clip behind the dog. You can see how round it is in the back. The vibrating unit will most likely eleminate all the grain. We'll have to see once I get the motors wich should be later this week. Same settings as the stills because this is the video from it.

And...incase you're wondering, I posted a picture of the phone where I got this paticular screen from. I do believe it's from a Samsung LG camera phone. I just walked in a local verizon shop and asked if they had any broken phones lying around and handed me a couple. Hope that helps some.

http://i57.photobucket.com/albums/g2...0306_0149a.jpg

What is your design for the vibrating diffuser like?
A) It's from Daniel's webiste.

Canon 50mm 1.8
Z75 MF15
No CC

http://www.filelodge.com/files/room37/1045520/Poc1.divx
http://www.filelodge.com/files/room37/1045520/Poc2.divx
http://www.filelodge.com/files/room3...c2%281%29.divx

Last edited by Rich Hibner; December 3rd, 2006 at 02:26 AM.
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Old December 3rd, 2006, 09:45 AM   #15
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:) You mean those vertical lenticular lens systems they have in them, or the back diffuser lens system, or circular filter? I don't know too much about their use, but I think I know the ones that you mean.

They are specially designed to take light from the back/side/front light and shoot it out the front to the user. But the angle on the best system has a wide spread (so a condenser is still practical) on the older systems has small angles, usually more on the horizontal than vertical (effects out of focus details).

With the vertical lenticular ones you maybe able to put two together at right angles to get better light. Higher res per inch displays should hopefully have finer diffusers.
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