[Vinny]

I have built a LCD projector after studying various web sites and forums. The projector uses long throw lens and is mounted at ceiling height 22 feet from the wall used as screen for 10feet wide image. It has all inputs including component video, VGA, S video, TV Tuner and easy keystone correction. My study of various forums revealed that design of the enclosure should be such that it should be possible to adjust all the elements with precision and hence I made the enclosure with front opening for such adjustment and the projection lense is also mounted with similar adjustmet. Overall results are excellent.
Complete details of the projector, design features, materials uses and their sources, pictures of the projector as well as the screen shots, web resources etc. are available at my web page:-
http://www.drtsoluti...m/Projector.htm

This post has been edited by Vinny: 19 January 2006 - 01:58 PM

[pagercam]

Vinny, on Jan 6 2006, 05:12 PM, said:

I have built a LCD projector after studying various web sites and forums. The projector uses long throw lens and is mounted at ceiling height 22 feet from the wall used as screen for 10feet wide image. It has all inputs including component video, VGA, S video, TV Tuner and easy keystone correction. My study of various forums revealed that design of the enclosure should be such that it should be possible to adjust all the elements with precision and hence I made the enclosure with front opening for such adjustment and the projection lense is also mounted with similar adjustmet. Overall results are excellent. I am now searching a front coated mirror glass of 16 inch X 10 inch so that slight ghosting due to parallax is eliminated.

Any pictures???

[paladin]

Vinny, on Jan 6 2006, 07:12 PM, said:

I have built a LCD projector after studying various web sites and forums. The projector uses long throw lens and is mounted at ceiling height 22 feet from the wall used as screen for 10feet wide image. It has all inputs including component video, VGA, S video, TV Tuner and easy keystone correction. My study of various forums revealed that design of the enclosure should be such that it should be possible to adjust all the elements with precision and hence I made the enclosure with front opening for such adjustment and the projection lense is also mounted with similar adjustmet. Overall results are excellent. I am now searching a front coated mirror glass of 16 inch X 10 inch so that slight ghosting due to parallax is eliminated.

What LCD, lamp, and lenses are you using for such a long throw?

[Vinny]

paladin, on Jan 7 2006, 08:16 AM, said:

What LCD, lamp, and lenses are you using for such a long throw?

Dear Paladin,
LCD is 13.3" XGA, metal halide lamp 400W, 135mm long throw triplet lens

[Vinny]

pagercam, on Jan 7 2006, 08:09 AM, said:

Any pictures???

Dear Pagercam,
Do you need pictures of the enclosure or the images on the screen?

[EL Nino]

How about both?

[Vinny]

EL Nino, on Jan 7 2006, 05:19 PM, said:

How about both?

Dear EL Nino,
Both are attached

 Projetor_Front_view.JPG (15.2K)
Number of downloads: 126  Projector_Front_View_Half_Open.JPG (18.66K)
Number of downloads: 138  Long_Throw_Lens.JPG (13.2K)
Number of downloads: 147[at
tachment=15641:attachment]  Screen_Image_2.JPG (27.8K)
Number of downloads: 5

Attached File(s)

•  Screen_Image_1.JPG (26.79K)
  Number of downloads: 125

[pagercam]

Vinny, on Jan 7 2006, 05:13 AM, said:

Dear EL Nino,
Both are attached

attachment attachment attachment[at
tachment=15641:attachment] attachment

What frenels are you using? 330mm before the triplet isn't enough and that maybe why your corners are dark, the colors seem off too.

[Vinny]

pagercam, on Jan 8 2006, 06:25 AM, said:

What frenels are you using? 330mm before the triplet isn't enough and that maybe why your corners are dark, the colors seem off too.

Dear pagercam,
The picture is perfectly OK, I will take another picture to show the lighting at the corneres

[Orange]

Vinny, on Jan 8 2006, 06:34 AM, said:

Dear pagercam,
The picture is perfectly OK, I will take another picture to show the lighting at the corneres

Yes, more pictures will be nice. Both, the projection and the enclosure.

Btw, where are you based in India? That looks like a screenshot from the Kajrare song.

This post has been edited by Orange: 09 January 2006 - 05:46 PM

[benjimatt]

looks kinda cool. long throw lens with a 13.3" lcd will probably produce good corners.

yeah more pics please

[Vinny]

Orange, on Jan 9 2006, 11:14 PM, said:

Yes, more pictures will be nice. Both, the projection and the enclosure.

Btw, where are you based in India? That looks like a screenshot from the Kajrare song.

Dear Orange,
Yea the screen shot is from Kajrare. We are based at Indore. All our contact details in my own web site www.drtsolutions.com/Projector.htm

[Orange]

Thanks. I'm based in Delhi and am yet to start my own projector. Good to see person from India here.

[Vinny]

Orange, on Jan 12 2006, 10:55 PM, said:

Thanks. I'm based in Delhi and am yet to start my own projector. Good to see person from India here.

Dear Ranjan,
Being in Delhi, you have advantage of getting all the materials locally. Will you please check up in Delhi whether front surface mirror of size 16 inch by 11 inch is availble? If that be so, please inform me the source and price, I will buy it immediately. As soon the mirror is received, I will take few more shots of projector and screen. Such pictures will be posted here as well as on my web site. My contact details are also available on my web page www.drtsolutions.com/Projector.htm

[Vinny]

benjimatt, on Jan 10 2006, 03:29 AM, said:

looks kinda cool. long throw lens with a 13.3" lcd will probably produce good corners.

yeah more pics please

Dear Benjimatt,
I have used a junk overhead projector (OHP). The metal halide lamp 400W is kept inside the metal enclosure of the OHP. The exhaust fan and the top glass remains as in OHP. The fresnel lens has been taken out and mounted on four long screws. LCD screen is placed on top of it. A mirror is mounted at 45 deg. Then long throw lens is placed in a wooden assembly having adjustments shown in the pictures. If you need I will shoot more pictures.

[Vinny]

benjimatt, on Jan 10 2006, 03:29 AM, said:

looks kinda cool. long throw lens with a 13.3" lcd will probably produce good corners.

yeah more pics please

After going through your PLOG, this is just for your information that my design will help you. For further details please visit my web page www.drtsolutions.com/Projector.htm

[pretheepkp]

Vinny, on Jan 13 2006, 03:43 AM, said:

After going through your PLOG, this is just for your information that my design will help you. For further details please visit my web page www.drtsolutions.com/Projector.htm

Hi Good to see people from India. Mee too from India. Just wondering, where do we get tempered glas in India for our particular size? How about Lexan? Couldnt find it. I have now managed to get it done by a normal sheet of glass(6mm thick)

[Vinny]

pretheepkp, on Jan 13 2006, 05:01 PM, said:

Hi Good to see people from India. Mee too from India. Just wondering, where do we get tempered glas in India for our particular size? How about Lexan? Couldnt find it. I have now managed to get it done by a normal sheet of glass(6mm thick)

Hi I didn't need the tempered glass as I got the same along with the junk OHP (Overhead Projector) However Tempered glass is easily available in the market from glass dealers. Anyway if you do not get any item locally, you may get most of the items from the stores of either lumenlab or diyprojectorcompany

[benjimatt]

i keep looking at your projector.

and i cant see where the light source or fresnels or lcd is placed. do you think you can show pics of these. and some more results

[Vinny]

benjimatt, on Jan 13 2006, 09:50 PM, said:

i keep looking at your projector.

and i cant see where the light source or fresnels or lcd is placed. do you think you can show pics of these. and some more results

Dear Benjimatt,
The replies to your question is already available at my webpage for which you may click at the link below:-
www.drtsolutions.com/Projector.htm
The basic concept of inside layaout showing arrangement of light source, fresnel and lcd is given in a picture at the bottom of my above web page with decription.
If still it is not clear to you, you are welcome to ask further questions, if any.

This post has been edited by Vinny: 14 January 2006 - 03:12 AM

[Vinny]

Vinny, on Jan 14 2006, 04:56 AM, said:

Dear Benjimatt,
The replies to your question is already available at my webpage for which you may click at the link below:-
www.drtsolutions.com/Projector.htm
The basic concept of inside layaout showing arrangement of light source, fresnel and lcd is given in a picture at the bottom of my above web page with decription.
If still it is not clear to you, you are welcome to ask further questions, if any.

Two more pictures are attached. Both pictures are of the room where the projector is placed. On one side it is placed on an almirah to be near to ceiling and opposite wall at a distace of 22 feet is used as screen after painting white.

Attached File(s)

•  Projector_at_Ceiling_Height.JPG (42.7K)
  Number of downloads: 4
•  Screen_at_the_Wall.JPG (35.91K)
  Number of downloads: 2

[Vinny]

Further screen shots are attached. These are 3D pictures taken by me and my grand daughter Suhani Kothari is standing before the screen. You need 3D glasses (having red and blue colour) to experience the 3D effect.

Attached File(s)

•  Sona_3D1.JPG (32.79K)
  Number of downloads: 2
•  Sona_3D2.JPG (33.71K)
  Number of downloads: 2

[Mikau]

cute kid!

[Vinny]

Mikau, on Jan 15 2006, 05:12 AM, said:

cute kid!

Dear Mikau,
Thanks for your comments. We have 3 grandchildren all below 7 years age. On holidays, we do lot of videography based on small movies made by them including script writing, acting, music, editing, titling, cd making etc. Then we enjoy these movies on our own home made projector.

[pretheepkp]

Vinny, on Jan 15 2006, 07:02 AM, said:

Dear Mikau,
Thanks for your comments. We have 3 grandchildren all below 7 years age. On holidays, we do lot of videography based on small movies made by them including script writing, acting, music, editing, titling, cd making etc. Then we enjoy these movies on our own home made projector.

Hi,

Those 3D pictures looks good. Can U tell us how to take pictures in 3D? and what are those glases made of? Will those pictures work effectively in Lumen Projectors?

Thanks,
Pretheep