Just got my French Prisms - Page 4 - AVS Forum
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Old 08-24-2007, 10:04 AM - Thread Starter
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If I still have it I'll check tonight, but you gotta have 50 produced to get them thus the reason Sam organized the unauthorized group buy.
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Old 08-24-2007, 05:46 PM
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Quote:
Originally Posted by Gerry S View Post

Was there an item number or SKU on the packing list?

There is some item lookup code which is L9513D

I guess Samy has some explanation to do here :-)
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Old 08-24-2007, 05:56 PM
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BTW in the picture posted by OMAN321 (010.jpg) I dont see any pincuchioning
or barrel distortion. If my picture was as rectangular as 010.jpg I would accept it.
OMAN321: did you have zoom turned all the way down.
It is also possible that not all the prisms that Samy made are identical.
I am also surprised to see the ampunt of reflections from a coated prism.
It is not as bad as the Masillion Plaque prisms but for a coated prism
it seems too much. Well cant complain for $126.80.
I just wish that the image were rectangular. I can also live with CA.
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Old 08-25-2007, 07:56 AM - Thread Starter
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Mupi,

I tried searching Surplus shed with that item number, nothing came up.

As far pic 10 I was I had zoom set to a little less than a 1/3. You'll definately need an enclosure and depending on projector placement you'll need to tilt the enclosure to square things up.

FYI: At Lowe's I saw a place mat in the cabinit area I might have used instead of the cork board if I had found that first.
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Old 08-25-2007, 11:12 AM
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Quote:
Originally Posted by Mupi View Post

There is some item lookup code which is L9513D

I guess Samy has some explanation to do here :-)

Thanks! As someone else said nothing came up. Oh well...
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Old 08-28-2007, 01:44 PM
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I got my french prisms yesterday, they were packed great, and in perfect condition. I made a first attemp to use them with my w9000 which has a huge lens, that is recessed quite far back. I got a decent picture on the screen, but because the light was sooo close to the edges of the prisms, it caused some reflections to the left and right of the projector.

I need to spend more time tweeking them, as I just set them on some books infront of the projector. I was quite impressed at how easy it is to get them lined up for a 2.35 stretch. It was only about 10-15 minutes until I had the screen filled.

The onscreen image looked pretty good, but I still don't know if these are large enought for the w9000. I am going to get a little more creative with the stand, and possibly build a box. If I can't get them to work I will likely go for the ausiemorphic or bite the bullet for the 380.

Luke
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Old 08-29-2007, 11:31 AM - Thread Starter
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Ok, I'm excited again about CIH.

I tested out where the screen will be ideally placed which is 21" away from the wall in false wall setup. My projector being also placed at it's ideal spot produced an image at min. zoom of 82.5". So 82.5 x 1.33 = 109.725 approx 110" width <--->. My room is about 11'.5" wide, but hey that still leaves a foot+ on each side so plenty of space.

The 82.5" 16:9 screen is approx a 95" screen diagonally which is a good 16:9 screen for the room. The Mrs. thought a 100" which resulted in 115" diag. was just to overwhelming. So this results in a 2:35 screen which is 119.5" diag. So im back in with Horizontal Expansion it would seem, it will be more definative as I near completion of the room.
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Old 08-29-2007, 07:48 PM
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Quote:
Originally Posted by oman321 View Post

My room is about 11'.5" wide, but hey that still leaves a foot+ on each side so plenty of space.

At least you've got room for side masking

Mark

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Old 08-30-2007, 08:11 PM - Thread Starter
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Hmmm... hadn't thought of the side masking. It would seem that it would fit if I make the screen borderless. My masking would need to be 13.75" and I would only have 14" on each side after a 110" screen. I think im gonna do drop down masking it would probably be a little easier to fit in and work out within a soffit above the screen.
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Old 09-01-2007, 03:51 AM
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I was wondering if there is any interest in having a metal, powder coated enclosure, cut with a plasma cutter and precise to the french prisms? I will hopefully have a prototype within 2 weeks and I am pretty sure I can get em done very reasonably if there is any interest. Of course I will go through Alan first if it comes to that.
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Old 09-01-2007, 06:01 PM - Thread Starter
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I'd be interested to see the prototype.
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Old 09-02-2007, 12:25 AM
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Quote:
Originally Posted by T_MINTON View Post

I was wondering if there is any interest in having a metal, powder coated enclosure, cut with a plasma cutter and precise to the french prisms?

I'm interested, keep us updated

Arrived!:Sam's euro anamorphic AR coated prisimsCurrent experience with: Sanyo Z5, HTPC: ATI 2400Pro|xbox HD-DVD add-on|HD-DVD decryptionPast experience with: Sony 1271, NEC 9PG+, Momitsu V880N
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Old 09-02-2007, 02:04 AM
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I'll support your effort.
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Old 09-02-2007, 07:52 AM
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I am gonna do it for myself anyway. He said he could do whatever I want. SO if there is anyone that can design in autocad, he could use that to set up his plasma cutter and viola!. Otherwise I am gonna have to rely on the french site or design one myself. Since I am his Mailman, he said he could give us a good deal...lol This is gonna take a few weeks so I will start another thread when I get mine done. I need to see if I can fine a good passthrough design for those that want that option.
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Old 09-03-2007, 12:16 AM
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Quote:
Originally Posted by T_MINTON View Post

SO if there is anyone that can design in autocad, he could use that to set up his plasma cutter and viola!. Otherwise I am gonna have to rely on the french site or design one myself.

Perhaps a bit of inspiration:

http://www.users.on.net/~michaelcare...ens/index.html

I'm not interested in passthrough, to complicated of an enclosure, just a simple thin compact box that can be mounted to a little sled.

Arrived!:Sam's euro anamorphic AR coated prisimsCurrent experience with: Sanyo Z5, HTPC: ATI 2400Pro|xbox HD-DVD add-on|HD-DVD decryptionPast experience with: Sony 1271, NEC 9PG+, Momitsu V880N
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Old 09-03-2007, 09:37 AM
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I think you are right VC. I certainly wouldnt want to embellish on your design tho. But you have given me direction.thanks
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Old 09-03-2007, 11:59 PM
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Quote:
Originally Posted by T_MINTON View Post

I think you are right VC. I certainly wouldn't want to embellish on your design tho. But you have given me direction.thanks

Not my design, an early Aussie adaptation of the CAVX Aussiemorphic product.

With a plasma cutter a fancier or neater fitting box could be made. The example I liked to could probably be done with any metal cutting tool and a decent vise for the bend. Additionally, something bolted together could flat pack for easy shipping.

Arrived!:Sam's euro anamorphic AR coated prisimsCurrent experience with: Sanyo Z5, HTPC: ATI 2400Pro|xbox HD-DVD add-on|HD-DVD decryptionPast experience with: Sony 1271, NEC 9PG+, Momitsu V880N
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Old 09-10-2007, 10:55 AM - Thread Starter
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Quote:
Originally Posted by T_MINTON View Post

I think you are right VC. I certainly wouldnt want to embellish on your design tho. But you have given me direction.thanks

Any progress on your efforts T_MINTON? Any ballpark figures of what your source might be able to get something like this done for?
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Old 09-10-2007, 04:59 PM
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As I mentioned, I had to build a prototype. I have done that, sorta. I am no carpenter or designer. I have a design that is simple so the cost will be as minimal as possible. Having said that, if you or anyone has a design that can work email it to me with measurements etc, Then I can take that to my friend and get us a quote.Otherwise, I work as aletter carrier full time and overtime, so my fiddling is on the weekend usually. I do have it up and I will take pics soon. It is crude at best but it does work well. I will keep you posted on further developements. tonyminton@gmail.com
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Old 09-11-2007, 06:53 AM - Thread Starter
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The best I have is the designs I attached at the beginning of thread in post 5-8 from the french site. There are some good pics with metric measurements in post 8 I believe with an enclosure which can be adapted to pass through. Other then that I have the enclosure I came up with in pics on post 47 48 & 49, which is a simple wooden enclosure made of 3/8 hobby craft wood. Below I pasted a response to Snowkirk as far as the dimension of the enclosure.
quote:
I got all the material at Lowes. The cork board was a plastic backed disc for plant pots. It cut easily and worked like a charm. The prisms are nice and snug and I have held the enclosure in every direction to test out. The most important dimension is for the side panels, they measure 3 1/8" inches. Originally they measured 3&1/4 and they were sliding everywhere the 1/8th made all the difference. The cork board measures 3/16. The top and bottom pieces are 5&7/8" at the big end and 4&1/4" at the small.
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Old 09-18-2007, 03:31 AM
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Sorry guys, still working on it.
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Old 09-18-2007, 07:02 AM - Thread Starter
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No worries, we eagerly wait

I'm in the midst of working in my dedicated space and now that everything from my temp. setup is down things are moving along a lot quicker.

Looking foward to what you come up with, keep us updated.
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Old 09-19-2007, 04:12 AM
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Well I have "working model" just need tobe sure I can get a full range of adjustments as far as angles. I am flying by the seat of my pants, mostly because I am not quite as smart as the EXPERTS that brought all this to us in AVS. The case should be easy enough to do but becasue everyone's install is different I will only be offering a case for the prisms and not a complete install kit (for clarification)I will post some early pics tonight or tomorrow if work permits. My folks are in from Fla. so I have been visiting.
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Old 09-25-2007, 05:36 PM
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I will be selling both the pairs. If anyone is interested please see my reply to the thread that was started a few days ago or you can also scroll back in this thread to my post about selling my prisms.
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Old 09-27-2007, 06:24 PM
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PRISM DIMENSIONS:

BTW Here are the prism dimensions as some of you had asked via PM

The first lens (one closer to the projector) is shorter than the second.
Both are of same height and angle. I dont know the angle off hand. I have
to get a calculator and compute it.

First Lens: Length 3 3/8 inch (this is the length of the slanted face)
Height 2 3/4 inch

Second Lens: Length 4 2/8 inch (length of slanted face)
Height 2 3/4 inch
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Old 10-01-2007, 08:37 AM
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Quote:
Originally Posted by Mupi View Post

PRISM DIMENSIONS:

I dont know the angle off hand. I have
to get a calculator and compute it.

20 degrees...

Mark

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Old 10-04-2007, 02:19 PM
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Hello Everybody!!!
The prisms you are all refering to where made by us - Surplus Shed

We now have them available on our website and will be stocking them on a regular basis.

Here's the link:

http://www.surplusshed.com/pages/item/l9113d.html

We only have 8 in stock right now but are having more made and they will arrive in about one month.

Please let us know if everything is described properly or if we should add anything to our desription.

Thanks!
Brent Gilson
Surplus Shed
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Old 10-04-2007, 06:53 PM
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Brent,

Quote:


When using a DLP projector to play a movie there are black bars on the top and bottom (widescreen), when positioned correctly, these prisms remove the black bars by stretching/correcting the image with no distortion.

This come from your website is totally inaccurate. The projector removes the black bars through a process we shall simply call "scaling". As a result, the geometry is affected (the image appears tall and thin as if vertically stretched). When the prisms are placed in the light path (with correct alignment) they optically restores the geometry through horizontal expansion, allowing the projection of films in cinema scope the way they were meant to be seen...

Mark

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Old 10-04-2007, 07:37 PM - Thread Starter
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Glad to see your carrying these as a regular stock item now. From my initial testing with these I am very pleased with the product.

As Mark says though your description is not accurate. The prisms restore the geometric shape of the image after its been stretched by the projector or a video scaler or even a dvd player or Home Theater PC. Many ways to do what's reffered to as a vertical stretch. Prisms are then used to horizontally stretch the image for Costant Image Height or in some cases Vertically Compress the image for Constant Image Width. To purpose is to get rid of the black bars and increase resolution. Also it's not only a DLP projector which you can use. It is better described as a digital projector which would better refer to LCD, DLP, LCOS, SXRD, etc...
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Old 10-05-2007, 08:19 AM
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Thanks for the info guys!
Our website is updated every Sunday so we'll make the corrections then.

Sometimes we just make optics for people and have no idea what they are using them for..
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