Hello Friends,

I have admired all of your input and effort for the last few months. As all know, once you know, you LumenLab or something like that. Seriously, thanks so much to all that have posted and provided such a vast amount of insight and information to this site. You know who you are, give yourself a pat on the back and 1080p yeah I know i..... Anyway, I'm jumping in and I would greatly appreciate all insight, guidance, and pertinent information to this endeavor. Thanks.

My proposed plan:
Vertical projector ... ala Pun15her, JoeChevy, ...
17" Samsung 740B 1280x1024 res, 600:1 contrast, 8ms response, .264mm pixel, RGB/DVI inputs
Appropriate fres's
*researching triplet at the moment
Pusle Strike T-15 and eBallast ... or better
FS mirror, lumber, threaded rod, wires , etc....

My proposed layout is:
13' (feet) from triplet to 16'x9' wall, ideal screen size would be 100"-144", 168" max.

However, after perusing this sight and playing with the calculators, I realize this may not be possible with a 17" and standard triplet... considering alternatives... After discovering more than what I wanted to know about this science, I understand that people have tried using opaque projector lenses with varying results. I accidentally purchased this and was hoping someone could tell me what to do with it , at least if it's even feasable trying to incorporate some of the features (lens, focus mechanism, light engine, possible FS,...) into a nice PJ. HELP! I bought it and I don't know what it is

Large American Opaque Projector (eBay $140):

eBay excerpt

Here is a gorgeous American Optical “Delineascope” opaque projector in very good condition.
Details:
With its 1,000 watt lamp, its adjustable illuminated pointer, and its huge 5-inch-diameter f-3.5 lens, the Delineascope is truly the king of opaque projectors.
The maximum size document that can be imaged by this projector is determined by a thick plate-glass window that is 10 inches square.
The cosmetic condition is good, and mechanically and electrically everything works fine. The cooling fan runs smoothly and quietly, and this projector has a working bulb. This projector is 21” long x 13” wide x 24” high, and it weighs 38 pounds.

Could someone please tell me what this is and how it may be useful in constructing a vertical PJ?
I have not received it; I just bought it today 1/21/06. All the info I have is from the eBay ad so....

It states the PJ has a triplet over 5" which I'm hoping is close to 135mm or greater. Does the f-3.5 mean the focal length is 3.5 inches, mm, or cm? or does it magnify the image by 3.5 factor. Maybe I haven't read enough, but my brain has been fried many times over by the sight THanks . j/k

I've had a couple of brainstorms... since the display glass is stated as 10" square, I thought about a hires (1024x768) 8"-10" LCD (<= 16ms response rate) and mounting it in the original display area...

Or constructing a similiar pun15her vertical image bank utilizing the 1000 watt bulb (hope it really is?), and using the upper part of this projector (grey part of the projector in attached pics). Basically just sitting it on top, aligned and appropriately fashioned onto the vertical PJ image bank.

Maybe I didn't state this so clearly, but any feedback would be greatly appreciated.

Thanks for all the help and knowledge

Howdy and welcome! If the projector you bought is anything like the old Vu-Lyte's, it's got an 18" FL lens which is really similar to the DIYPJ 135mm lens. You'll have "issues" getting a 17" panel focused edge-to-edge, but it's a big and bright lens. The 220/550 fresnels might work well with it.

Re: the projector body, you might be able to fit a 15" panel in the existing body, but it'd be some work to enclose the lower section and rework the light engine and cooling. I almost attempted this myself with a Vu-Lyte, but the metal frame was bent out of shape. In any case, you should have a nice FS mirror and focusing mechanism.

Good luck!

Looks good, I would expect it to be similar to the buhl and Bessler Opaque projectors that have just the sort of lenses that we can use. It seems that companies often try to match one another for specs, so it proibably has a lot of good components for PJ building. Its all metal so unless you have good metal working tools and skills it may be easier to build a wooden box than trying to use this although I must admit having all together and align makes it worth a try. Keep us posted once it arrives.

I have one too. The pro lens is a little sharper but the AO is 127mm in size this will let you use a larger lamp if you wish. Right now it looks like I may still be the first to do that.
The PJ will also give you a good piece of heat glass and a fs mirror and the fan could be used if you wished. I have done some testing with a 18” buhl lens and the focus is good on a 17 but not perfect.

Good luck and have fun

The f-3.5 value is a ratio between the diameter and the focal length. So if its diameter is 135mm then 135mm*3.5 = 472.5mm FL.

DJ

Hye Guys, Thanks for all the good info. Sorry I haven't posted any new items lately. After what seems like an eternity, I am supposed to receive the projector today. Can't wait to get home from work... the days just starting. I don't have a digital cam, but I will try to post some pics of it with a web cam.

I have been searching and looking for a good 17" monitor. I said I wanted to go with the Samsung 740B, but I read the antiglare is hard to remove on Samsung's. I see a lot of people using the Hyundai L72s with what looks like great results. I found this Samsung LCD TV on Newegg. The specs look the same as the 740B, good inputs except no component.

Samsung 710MP
http://www.newegg.com/product/product.asp?...N82E16824001145

I wonder if anyone has stripped this monitor or removed the AG.

I would like to order a monitor this evening, so I would greatly appreciate any suggestions for a good, easy to strip 17" monitor. Thanks for all your help, gotta run, late for work.....

One thing you may want to watch for that you may or may not care about is the color depth. Almost all these monitors with the so called fast response time are that way because they reduce the number of colors the monitors can actually display. By reducing the colors, they can speed the response time up. You'll notices the Samsungs and the Hyundais boast 16.2 mil colors. This actually means it's 6-bit color with only 262,000 colors. They get the 16.2 by dithering (foolling your eye by blending nearby colors). True color is 16.7 mil which actually IS 16.7 mil colors. This may make a bigger difference when projecting but I can't vouch for it yet (haven't build my proj yet). I've been searching everywhere for the perfect monitor too and the one thing I've noticed is that if a monitor has a super fast response like 8ms or even 4ms, then it's almost always 16.2. And if they don't list it in the specs, you can almost bet that's why. But, to each their own.

You might want to research the Viewsonic N1750w. They are 17" widescreen LCD HD Tvs with 600:1, 12ms and from what I can tell, true color (16.7). That's a really fast response for a true color monitor. Only problem is finding them cheap. I don't know how they strip, but I've been trying to find one for one for a while now. Every once in a while deals come along, and the lowest I've seen (and missed) was $320 on ebay which is more than half what they cost at a store. (still kicking myself for missing that auction.)


Here is a quote someone else made in another topic that explains the color biz well:
8-bit or "true color" is: 2^8 x 2^8 x 2^8 = 16.7mm colors
6-bit color depth calc: 2^6 x 2^6 x 2^6 = 262,144 colors. The 16.2mm is achieved by dithering where nearby pixels are changed slightly to achieve a different color and trick the eye (like color in a newspaper).


~heli0s

Hi Donkeytech,

Wondering about your comment regarding edge-to-edge. Does this also imply corners? Reason I am asking, is I received 2 of these 18" EL's today. I am considering a build with a Viewsonic 18" LCD (VP181b) which will be generally dedicated to runnning 1280x720. In which case the corners should be less of an issue.

I read somewhere that these lens were really designed for a 12x12 inch area. There is a grid inside the projector that seems to coorelate to this dimension. I really didn't look that closely.

The panel is roughly 15x12.5 with exterior enclosure stripped off but still with its metal interior frame. I wonder if the 15 span will be an issue with respect to side to side? I'll know by this weekend if it has FFC issues. If it does, I am going to revert to the Proview 15.4 inch widescreen.


Regards,

David

HAH! you thought I dropped off the planet, but I'm still around. No, but really guys, thanks for all of your input and suggestions taking me onto to more tagents in this journey. Special Thanks to DonkeyTech, PagerCam, ArizonaVideo, DAZZZLA, and heliOs! WOW you guys really know tooo much

By suggestion, I have accumulated the following:

18" FL opaque triplet (5"diameter, 6"length) with 2.5" plus/minus focus mechanism and seal

F220 and F550 Fresnels (320mmx400mm or 12.6x15.75", .2mmgroovepitch)

12.5x16" LumenL FS mirror

EiKO MH400/U/T15 4100K lamp, mogul

ISB Sola Basic E-MCAOFT400F M59orH33/400W F-Can Ballast

(2) 120mm LumenL Fans, grills, filters, DC adapter, AC plug, etc.

Oh, yeah, and this really nice 740B that I have become very fond of .

and a free cardboard box ......................

Don't want to bore you guys and gals with rhetoric, so hear are a few pics or what we have arrived at. This project will be called:
"THE FRIDGE"

Dismantled...

Layout...

Template:

Description:

Black Rectangle:
Triplet 18" FL, 5"diameter, 6"length

Focus Mechanism: variable + - 2.5"

Red: Centerline
200mm Triplet (center=3") to FSmirror (Grey)

Blue (Image Path):
219mm FSmirror to LCD (Samsung 740B: blue bar)

Yellow (Fresnel):
260-350mm to 550fres

Pink:
10.25"x11.5" .25"thick tempered glass (heat insulator)

White (Light Path):
EiKO MH400/U/T15 Bulb(white bar) w/ X,Y,Z travel and Pro Reflector

Teal (Airflow):
(2) 120mm LumenFans w/Guards and Filters

Mounted on 5/8" or 3/4" MDF wood plates.

Thanks for all of your help. Goodnight all

Oh, I forgot this pic of the lens and focus mechanism.... zzzzzzzzzzz