Cheap coating opportunity for USA prisms - Page 4 - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #91 of 214 Old 05-14-2007, 02:33 AM
Senior Member
 
MAZMAN808's Avatar
 
Join Date: Nov 2001
Location: Sydney,Australia
Posts: 307
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
man, those are some nice pictures
I cant wait to get mine.

Well done, and thanks for sharing.
MAZMAN808 is offline  
Sponsored Links
Advertisement
 
post #92 of 214 Old 05-14-2007, 08:44 AM
Senior Member
 
RandyFreeman's Avatar
 
Join Date: Feb 2007
Posts: 435
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I finally got a chance to try my prisms. I set the prisms on a table in front of my projector. The Crystal Factory prisms have a greater angle than the prisms from Massillon Plaque. Because of this I needed to set the new prisms at less of an angle to the light path. This will make my new housing 1" shorter and 1/2" wider than my old housing. I have a projector that has a recessed lens and the geometry of the new prisms make it easier to get the prisms slightly closer to the lens. Every little bit helps in this situation.

I did this experiment during the day, in a room with lots of light. I was just trying to figure out the angle of the prisms so I can build the housing. I did notice that the coated prisms seem to have reduced the reflections. In fact I didn't see any reflections on the walls. With my uncoated Massillon Plaque prisms, under the same condition, I saw some strong reflections on the walls.

My old housing was fully adjustable. This time I'm going to make a simple housing that isn't adjustable. I'm just going to set the prisms at the angles that I determined during my experiment and I expect the new lens will work perfectly.

Randy
RandyFreeman is offline  
post #93 of 214 Old 05-15-2007, 07:54 AM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I built a prototype case yesterday... I'm not very handy with tools and it shows. I still have everything down off the ceiling on a table as I design and build my final case.



Jaws is on this weekend on Universal HD. I can't wait to watch my favorite movie with the prisms!

I love this setup! (well not my crappy case design but the potential)
klemsaba is offline  
post #94 of 214 Old 05-15-2007, 08:40 AM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Some shots from the HD-DVD King Kong disc. I need to get better at taking screen shots because I did have to do some color correcting this time because my camera didn't white balance properly... but that is close to what I see.



klemsaba is offline  
post #95 of 214 Old 05-15-2007, 08:43 AM
AVS Special Member
 
CAVX's Avatar
 
Join Date: Aug 2005
Location: Brisbane, Australia
Posts: 8,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 31
Cool How did you "scale" the images when using HD DVD as a source?

Mark

Mark Techer

I love my Constant Image Height system!
CAVX is offline  
post #96 of 214 Old 05-15-2007, 08:48 AM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by CAVX View Post

Cool How did you "scale" the images when using HD DVD as a source?

Mark

My Sanyo Z4 scales all resolutions on Component, HDMI, and VGA. Those shots are from my XBOX 360 HD-DVD drive hooked up via VGA.
klemsaba is offline  
post #97 of 214 Old 05-15-2007, 03:24 PM
Senior Member
 
prabhatb's Avatar
 
Join Date: May 2005
Location: San Mateo, CA
Posts: 248
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Hi

You might have seen this before: this guy has a nice DIY housing with rail system:

http://www.zuggsoft.com/theater/prism.htm

Thanks

*Prabhat*
prabhatb is offline  
post #98 of 214 Old 05-15-2007, 06:17 PM
AVS Special Member
 
CAVX's Avatar
 
Join Date: Aug 2005
Location: Brisbane, Australia
Posts: 8,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 31
That is MikeP's set up. He was a real good contributor to the cause at diyaudio where he did heaps to investigate the stray light problems those with non coated prisms were having. His site should be added to the sticky thread for equipment that works with CIH...

Mark

Mark Techer

I love my Constant Image Height system!
CAVX is offline  
post #99 of 214 Old 05-15-2007, 07:09 PM
AVS Special Member
 
Steve Scherrer's Avatar
 
Join Date: Nov 2001
Location: Crystal Lake, IL
Posts: 1,843
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by CAVX View Post

That is MikeP's set up. He was a real good contributor to the cause at diyaudio where he did heaps to investigate the stray light problems those with non coated prisms were having. His site should be added to the sticky thread for equipment that works with CIH...

Mark

Has it been established that the coating does a good job on the "stray light problems?"

Registered U.S. Patent and Trademark Attorney
Steve Scherrer is offline  
post #100 of 214 Old 05-15-2007, 07:17 PM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Steve Scherrer View Post

Has it been established that the coating does a good job on the "stray light problems?"

Based on my experience with both coated and non-coated prisms I would say YES.
klemsaba is offline  
post #101 of 214 Old 05-15-2007, 10:19 PM
AVS Special Member
 
CAVX's Avatar
 
Join Date: Aug 2005
Location: Brisbane, Australia
Posts: 8,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 31
Quote:
Originally Posted by klemsaba View Post

Based on my experience with both coated and non-coated prisms I would say YES.

And I second that

Mark

Mark Techer

I love my Constant Image Height system!
CAVX is offline  
post #102 of 214 Old 05-16-2007, 06:52 AM
Advanced Member
 
mustang5o's Avatar
 
Join Date: Nov 2003
Location: Somewhere in middle America.
Posts: 570
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
Quote:
Originally Posted by klemsaba View Post

My Sanyo Z4 scales all resolutions on Component, HDMI, and VGA. Those shots are from my XBOX 360 HD-DVD drive hooked up via VGA.

Are your sure the Sanyo scales on all inputs and resolutions? From what I read and was told the Z4 only scaled SD material. That information made me pass up a great deal on a used Z4. Don't get me wrong, I love my Panny PT-AX100U (waiting on lens) but it would have been nice to spend half as much money

Anyway, nice pics. Can wait to get my lens!

"Like a Ninja, only better!"
mustang5o is offline  
post #103 of 214 Old 05-16-2007, 07:09 AM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by mustang5o View Post

Are your sure the Sanyo scales on all inputs and resolutions? From what I read and was told the Z4 only scaled SD material. That information made me pass up a great deal on a used Z4. Don't get me wrong, I love my Panny PT-AX100U (waiting on lens) but it would have been nice to spend half as much money

Anyway, nice pics. Can wait to get my lens!

Yep, it scales HD as well. From what understand, your Panasonic is much better than the Z4 anyway. Enjoy your setup! You'll love it when the lens arrives!
klemsaba is offline  
post #104 of 214 Old 05-16-2007, 03:25 PM
AVS Special Member
 
Mupi's Avatar
 
Join Date: May 2003
Location: Midwest
Posts: 3,063
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 26
Quote:
Originally Posted by RandyFreeman View Post

I finally got a chance to try my prisms. I set the prisms on a table in front of my projector. The Crystal Factory prisms have a greater angle than the prisms from Massillon Plaque. Because of this I needed to set the new prisms at less of an angle to the light path. This will make my new housing 1" shorter and 1/2" wider than my old housing. I have a projector that has a recessed lens and the geometry of the new prisms make it easier to get the prisms slightly closer to the lens. Every little bit helps in this situation.

I did this experiment during the day, in a room with lots of light. I was just trying to figure out the angle of the prisms so I can build the housing. I did notice that the coated prisms seem to have reduced the reflections. In fact I didn't see any reflections on the walls. With my uncoated Massillon Plaque prisms, under the same condition, I saw some strong reflections on the walls.

My old housing was fully adjustable. This time I'm going to make a simple housing that isn't adjustable. I'm just going to set the prisms at the angles that I determined during my experiment and I expect the new lens will work perfectly.

Randy

very valuable piece of info. Thanks
I am glad I returned the massillon plaque prisms. They
were pretty much like mirrors!
and yes I had to tilt those prisms a lot to get the stretch as
the angles were small. This made the beam on the second
prism way too big, falling very close to the top edge, which could
cause more reflections.
Mupi is offline  
post #105 of 214 Old 05-17-2007, 01:19 AM
Senior Member
 
prabhatb's Avatar
 
Join Date: May 2005
Location: San Mateo, CA
Posts: 248
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Mupi/Randy,

I am considering to try Massilion Plaue prisms in 4set lens configuration. But what I hear about reflection problem I am kinda pausing the thought.

However, if you place the prisms in a housing and mask it around properly (as in http://www.zuggsoft.com/theater/prism.htm) you think you can reduce the reflection issues?

*Prabhat*
prabhatb is offline  
post #106 of 214 Old 05-17-2007, 01:26 AM
Senior Member
 
prabhatb's Avatar
 
Join Date: May 2005
Location: San Mateo, CA
Posts: 248
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Anyone has a thought if anti-glare/reflection films can be used on these prisms? You may need to paste this film on one side of each prism.

One such product is 3M HF300L Anti-Glare/Radiation Computer Filter. But it is a panel, not a film.

*Prabhat*
prabhatb is offline  
post #107 of 214 Old 05-17-2007, 09:48 AM
Senior Member
 
prabhatb's Avatar
 
Join Date: May 2005
Location: San Mateo, CA
Posts: 248
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
This is a cheap LCD screen protection film - anti-glare: (but may not be useful because of small size)

http://www.pdaextreme.com/product_in...products_id=55

*Prabhat*
prabhatb is offline  
post #108 of 214 Old 05-17-2007, 09:52 AM
AVS Special Member
 
JDLIVE's Avatar
 
Join Date: Apr 2003
Location: Marlborough, MA
Posts: 2,896
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 23
Send a message via Yahoo to JDLIVE
Quote:
Originally Posted by prabhatb View Post

Mupi/Randy,

I am considering to try Massilion Plaue prisms in 4set lens configuration. But what I hear about reflection problem I am kinda pausing the thought.

However, if you place the prisms in a housing and mask it around properly (as in http://www.zuggsoft.com/theater/prism.htm) you think you can reduce the reflection issues?

I have the Massilion Plaque prisms in a hosing and don't have major problems with reflections. There are some off to the side and behind my PJ, but I don't notice them when watching films.

I did also have some off to the left that were bothering me because they hit the entrance to my HT room and that hallway is painted white. So I solved that problem by hanging a nice black curtain across the entrance.
JDLIVE is offline  
post #109 of 214 Old 05-17-2007, 11:16 AM
Senior Member
 
prabhatb's Avatar
 
Join Date: May 2005
Location: San Mateo, CA
Posts: 248
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
JDLIVE,

Thanks for sharing the info.

I am also thinking to get computer monitor anti-glare filter (extras lying at my work) and use it whenever I build MP prism lens. If a piece of such filter can be placed at the entrance of the housing, it may reduce the reflection off the prism towards the projector.

Currently I have a prismasonic H700 lens in a housing and I may try this anti-glare filter, although the prismasonic prisms are AR coated.

*Prabhat*
prabhatb is offline  
post #110 of 214 Old 05-18-2007, 07:01 AM
AVS Special Member
 
Steve Scherrer's Avatar
 
Join Date: Nov 2001
Location: Crystal Lake, IL
Posts: 1,843
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by prabhatb View Post

Anyone has a thought if anti-glare/reflection films can be used on these prisms? You may need to paste this film on one side of each prism.

One such product is 3M HF300L Anti-Glare/Radiation Computer Filter. But it is a panel, not a film.

Yes, I tried these. They did not work at all. You have to use these for a system where the film is placed immediately on the display source (like on a monitor screen). Once you put these on the face of the prisms, you completely mess up the image--it's like smearing vaseline on the face of the prisms.

Registered U.S. Patent and Trademark Attorney
Steve Scherrer is offline  
post #111 of 214 Old 05-21-2007, 09:46 AM
Member
 
BudBray's Avatar
 
Join Date: Dec 2003
Location: Burlington, Ont (near Toronto)
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by prabhatb View Post

Mupi/Randy,

I am considering to try Massilion Plaue prisms in 4set lens configuration. But what I hear about reflection problem I am kinda pausing the thought.

However, if you place the prisms in a housing and mask it around properly (as in http://www.zuggsoft.com/theater/prism.htm) you think you can reduce the reflection issues?

I have 4 of those prism and yes, you get wicked reflections...I think I posted on the DIY forum, pictures of the CARS credits....NASTY. Have a set of 4 CF prisms waiting for me at my inlaws in Virginia. Pick em up in July, then I'll post pics of the new VS the old.
Bud
BudBray is offline  
post #112 of 214 Old 05-22-2007, 09:52 AM
AVS Special Member
 
Steve Scherrer's Avatar
 
Join Date: Nov 2001
Location: Crystal Lake, IL
Posts: 1,843
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Well, it appears I am late to this party, but is it too late to get involved in a purchase from Crystal Factory? I keep hearing how these are so much better than the Massillon plaque prisms (and thicker), and wanted to toy with them a bit. How do I get the cheapest price for these prisms (and what is the cheapest price?)

Also, is it too late to get these coated as well?

Registered U.S. Patent and Trademark Attorney
Steve Scherrer is offline  
post #113 of 214 Old 05-31-2007, 08:46 PM
Advanced Member
 
klemsaba's Avatar
 
Join Date: Jun 2003
Location: Wichita, KS
Posts: 533
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I built a new case today. Sorry no photos yet. My kids are on vacation with the camera. I thought I would share some ideas...

I'm not very handy with tools and building things (unless it is with LEGOS). I was having a difficult time working with MDF... splitting wood, the dust is horrible, doing multiple cuts, etc.

I went to Lowes today and bought some 1"x10" A-stock pine boards. They were already very close to the proper width I wanted (9 1/2") so all I had to do was cut the other sizes (2- 5 1/4" and 2- 8 1/2") and nail/screw everything together. It really turned out nice. I don't think I'll do the fancy angled cut on the front that others have done. I also bought a 1"x4" board to work on the mounting bracket. The cost was about $15.

I'll post some photos late Saturday or Sunday.

I have to say again that these prisms are great! There is some light loss using the prisms... probably about the same as when i zoomed the image before. But the prisms are way cooler and easier to use than zooming and positioning the image on the screen plus the image doesn't get softer as it does when zooming. The AR coating is amazing. I have yet to see any stray reflections on the screen. Yea, I have some geometry issues at the edges of the screen and a little CA, but you really don't notice those issues when watching a movie.

Later!
klemsaba is offline  
post #114 of 214 Old 06-03-2007, 06:22 PM
Advanced Member
 
Gerry S's Avatar
 
Join Date: Dec 2002
Location: Atlanta, GA
Posts: 504
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
Richard, did you get the feeling that the optics coating guy had to charge extra up front for lower volume because he had to make a mold or incurred some setup costs? If so, I wonder if he would help out individuals as opposed to dealing in volume at this point.

If not, I wonder if there would be enough interest for another round?
Gerry S is offline  
post #115 of 214 Old 06-03-2007, 07:03 PM
AVS Special Member
 
CAVX's Avatar
 
Join Date: Aug 2005
Location: Brisbane, Australia
Posts: 8,354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 31
This thread needs to be moved into the DIY section now...

Mark

Mark Techer

I love my Constant Image Height system!
CAVX is offline  
post #116 of 214 Old 06-04-2007, 12:07 PM
Advanced Member
 
adude's Avatar
 
Join Date: Dec 2005
Location: SoCal
Posts: 729
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked: 15
Quote:
Originally Posted by Steve Scherrer View Post

Well, it appears I am late to this party, but is it too late to get involved in a purchase from Crystal Factory? I keep hearing how these are so much better than the Massillon plaque prisms (and thicker), and wanted to toy with them a bit. How do I get the cheapest price for these prisms (and what is the cheapest price?)

Also, is it too late to get these coated as well?

Steve,

You can call Crystal Factory and order the prisms. They gave us the regular price. The item no you are looking for CWD57 and make sure to tell them "No engravings" on the prisms.

About coating, not sure. Call L&L if they would do the coating for you.

Manoj
adude is online now  
post #117 of 214 Old 06-06-2007, 10:54 PM - Thread Starter
Senior Member
 
rcgustafson's Avatar
 
Join Date: Mar 2000
Location: Sebastopol, Ca USA
Posts: 247
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
adude is right. It was $60. each for the wedges at CF and that was the normal price. The deal was getting the coating done cheaply at L&L. Richard LaRue at L&L was clear that he did not want to handle individual coatings at a cheap price nor did he wish to deal with the hassle of shipping out individual orders. I suppose he could change his mind, though.

There is no mold involved in the coating process as far as I know. The coating is baked on one prism at a time but certain procedures and tolerances are set up to make it more efficient to do a batch.

The best alternative is to start a new group order or buy coated prisms from CAVX. Be my guest!

By the way, I haven't built my lens housing yet. I just got the new screen installed yesterday. It's a 124"w 2.40 Da-Lite Contour Electrol HP. Looks great with my RS-1!

Richard
rcgustafson is offline  
post #118 of 214 Old 06-07-2007, 11:58 AM
Member
 
allensbad's Avatar
 
Join Date: May 2007
Posts: 52
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Well I'm up for starting a new group order, anyone else?

BTW does anyone know what happened with the French guys, I can't find any reference of the posts here on AVS. I recall they may be taking orders for a second group buy in July or something like that?

I found the web site but given I don't speak french it doesn't really work for me...
allensbad is offline  
post #119 of 214 Old 06-07-2007, 01:11 PM
AVS Special Member
 
oman321's Avatar
 
Join Date: Sep 2005
Location: MASS
Posts: 4,643
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 23
Quote:
Originally Posted by allensbad View Post

BTW does anyone know what happened with the French guys, I can't find any reference of the posts here on AVS. I recall they may be taking orders for a second group buy in July or something like that?

I fount the web site but given I don't speak french it doesn't really work for me...

That thread was removed due to it being considered an unathorized power buy. As I understood it, there wasn't enough interest for an additional group order so instead additional units were purchased with some being taken by some late comers but at the time there should have been about 7 pairs available. Put a message on the site you found in english and I believe they will respond to you. Good luck.
oman321 is online now  
post #120 of 214 Old 06-07-2007, 08:08 PM
Member
 
allensbad's Avatar
 
Join Date: May 2007
Posts: 52
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
oman321,
thanks for the info, I'll see if they have any more.
allensbad is offline  
Reply DIY Constant Height

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off