| dantho |
Hi, well I haven't had much time over the past several months to do more than skulk around the archives, but props to ACE (his words of wisdom made me reanalyze my driver-board problems and work more pragmatically.)
What i have made: A series of 6 identical PAL beamers, using:
300 Watt power supply
PAR-36 100W 13volt "aircraft" lamp
AU 5.6" PAL/NTSC transmissive
2 fresnel lenses
1 Beseler enlarger lens (14" E.F. Series III) - I think its a triplet
1 small fan
4" sewage pipe (white PVC)
Gardening planter (sheet metal heat sink)
0.75mm steel enclosure
1mm steel interface
Acrylic caulk
300 Euro Materials cost
Why I did this:
http://horopter.net/ |
|
|
| dantho |
Here's a pic...
 |
|
|
| dantho |
| it would be kind of nice to hear some feedback or questions... any comments out there? |
|
|
| HouseMachine |
Daniel pictures are so blurry, not understandable... However I liked dimensions of your projector, also liked unique shape.
BTW you' ve used a low res lcd panel, so there is probably huge screen door effect, which is bad. You can use a Lilliput lcd panel on your next project IMO, it has very nice resolution...
But I think you need to change your digital camera firstly :) |
|
|
| HouseMachine |
I have some questions; what are the specifications of that lamp ? I mean lumen output value, color temp and life / hour....
Also, what is the screen door effect level, could you get 60" - 70" picture without huge screen door effect ? ( from 3 meter seating distance )
Last question is; could you get bright picture in day time ? ( with curtains closed ) |
|
|
| dantho |
well, as far as the lamp goes, it is a GE 13volt 100watt that I am feeding 12volt to, a little less power but the image is still visible in less-than-completely-dark rooms. Although I haven't found specs on the lamps, similar ones last from between 100-300 hours, which translates to like 10cents/hour or so. Kind of hefty, but they are the perfect size for my project.
There is a screen door at very large sizes (5 meter diagonal), but my application has a throw distance of about 2.25 meters, so the screen door isn't that much of a problem: actually the diameter of the image is about 100 cm, and you can see the individual pixels, but for this project that was important, especially with regards to image alignment. I can match & overlay pixels, which increases the 3-dimensional effect of the entire projection / reflection system.
I got a pretty good deal from a taiwanese company on the pal lcd's, because all I have for this project are PAL cameras, more would be overkill and its senseless to overdo the projectors when the signal source is low-bandwidth anyway. (they were like 90 dollars for the tft, driver and controller: exquisitely easy to take apart! AU rocks.) like you don't use a piledriver when all you need is a simple claw hammer...
as far as the camera goes, I had to give it back to work...:bawling:, and am currently stuck making pics with my T630... maybe my sister'll let me borrow hers.
the only serious problem I have is that without a condensor, i am getting traces of lens imperfections on the projected image (like rings where the image is brighter). i thought about etching the surface of the glass with hydrochloric acid (for a bit of a frosted look...) but still don't know exactly. |
|
|
| HouseMachine |
| quote: | | I can match & overlay pixels, which increases the 3-dimensional effect of the entire projection / reflection system |
Hmm sounds interesting... Are you using D-scaler kind of plug-in ? |
|
|
| dantho |
no plug-ins, its a 100% dun-it-myself from components and machined parts system where I will be creating a three-dimensional image by compositing portions of images on top of one another. the images will be displayed on a rotating screen. :D
you can see my website for more information. |
|
|
|
