I have run into a dilemma in planning my room around my projector. My setup is as follows: Elmo HP-L355 Deluxe OHP with an Infocus Powerview 950 panel. The panel has a screen diagonal of 10.4". The size of my image is limited to the size of my wall, not the distance away from the wall that my projector will allow. Currently, I have the lens of the OHP sitting at 8 ft 9 inches away from the wall which produces a 74" diagonal (4:3 aspect ratio, it fills up the entire LCD). The problem is, the projector is not set against the opposite wall, it could still be moved back another foot and a half. In order to place the projector where I would need it (flush against the wall) I would need to decrease the magnification of the image by just a small amount. I can move the distance between the lens and the panel, but this is just to focus and will not create a sharp image.
I know very little about lenses, but the lens that I imagine would need replaced is 3.5" in diameter and concave one one side (the top) and convex on the other. The lens is elevated above the glass on top of the LCD panel by approximately 15". Basically, I was wondering if there is a way to swap this lens out for one that does not magnify quite as much (If the image must become a few inches smaller also, this is ok). I would rather have the projector rest flush against the wall than having the full 74" screen at its complete maximum (it can NOT get any larger).
Thanks for any help. If anyone has any better ideas please let me know. As of now, a custom enclosure is out of the question. This unit needs to be a stand-up unit rather than a long unit because of the lack of space in my room. I'll attatch a picture of what my room set up currently is, and how I would like to set it up in the long run.
For the first picture, the projector is sitting on Desk 2 facing the wall at the bottom of the Gif, next to my door. Desk 1 houses my computer, and the SP boxes stand for "speaker". They aren't integrated at all with the projector, but I've got better plans for this all later 🙂 The crossed out portion on the left side is my closet that slopes upward because it is above a staircase.
I know very little about lenses, but the lens that I imagine would need replaced is 3.5" in diameter and concave one one side (the top) and convex on the other. The lens is elevated above the glass on top of the LCD panel by approximately 15". Basically, I was wondering if there is a way to swap this lens out for one that does not magnify quite as much (If the image must become a few inches smaller also, this is ok). I would rather have the projector rest flush against the wall than having the full 74" screen at its complete maximum (it can NOT get any larger).
Thanks for any help. If anyone has any better ideas please let me know. As of now, a custom enclosure is out of the question. This unit needs to be a stand-up unit rather than a long unit because of the lack of space in my room. I'll attatch a picture of what my room set up currently is, and how I would like to set it up in the long run.
For the first picture, the projector is sitting on Desk 2 facing the wall at the bottom of the Gif, next to my door. Desk 1 houses my computer, and the SP boxes stand for "speaker". They aren't integrated at all with the projector, but I've got better plans for this all later 🙂 The crossed out portion on the left side is my closet that slopes upward because it is above a staircase.
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This next picture is the layout I plan on using. I have taken out the speakers and stereo completely (I'm integrating them into my computer to save space). I have a set of Logitech z560 4.1's on the way 🙂. The ugly orange block is a futon that I would ideally like to get. This shows the futon in the "bed" position, it would normally not be this wide because it would be in the couch position to watch movies/tv/play games etc.
The projector will sit on Desk 3 this time. Desk 1 will hold my computer (once again). I could also leave desk 1 where I had it in my last diagram, but it really depends on how much furniture I feel like moving when (and if) I do it 🙂. Desk 2 will (possibly) hold my front-right satellite. The front left satellite will be mounted above my door on the left wall (according to the direction I am facing while sitting on the futon). The sub will most likely be beside Desk 3 on the floor about a foot away from the wall facing the wall. The rear satellites will be mounted in their extreme back corners respectively. Note, ignore the bed and stereo in the bottom left part of the image. They are out of the room, hey I needed somwhere to put them while factoring in the futon!
once again any suggestions/comments are welcome. I have never laid out a surround sound system before (I am not as much of an audiophile as I am a visualphile [a word?]), so if you notice any flaws in my design please let me know 🙂 thanks.
The projector will sit on Desk 3 this time. Desk 1 will hold my computer (once again). I could also leave desk 1 where I had it in my last diagram, but it really depends on how much furniture I feel like moving when (and if) I do it 🙂. Desk 2 will (possibly) hold my front-right satellite. The front left satellite will be mounted above my door on the left wall (according to the direction I am facing while sitting on the futon). The sub will most likely be beside Desk 3 on the floor about a foot away from the wall facing the wall. The rear satellites will be mounted in their extreme back corners respectively. Note, ignore the bed and stereo in the bottom left part of the image. They are out of the room, hey I needed somwhere to put them while factoring in the futon!
once again any suggestions/comments are welcome. I have never laid out a surround sound system before (I am not as much of an audiophile as I am a visualphile [a word?]), so if you notice any flaws in my design please let me know 🙂 thanks.
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hm...well does anyone know of a good site that can explain what type of lens I have? It's in a dome shape. I searched the wiki but none of the links provided the information I was looking for really.
Basically it's not like this: () (convex), or this )( (concave)..it's more like this: ))
I tried googling to no avail.
Maybe a zoom lens would help? I would need one where the lowest setting is lower than what I currently have though...please help
Basically it's not like this: () (convex), or this )( (concave)..it's more like this: ))
I tried googling to no avail.
Maybe a zoom lens would help? I would need one where the lowest setting is lower than what I currently have though...please help
Try this...
Read my thread with "optics solver link"
link:
http://www.optics-online.com/Image1.asp
Hi,
I have started building my projector for a week and was not sure what type of lens to use. My lcd panel is 10.4 diagonal, I am thinking of using Metal Halide (yet to decide 400W or 1000W) and will build a box from IKEA toy box. The most difficult part is to find a lens and I came across this link. I think its pretty nice so thought to share with all of you.
Link:
http://www.optics-online.com/Image1.asp
My LCD size = 10.4
Screen to LCD distance = 15 feet
using this parameters on the above link, they recommend a plano convex lens of about 300 mm EFL. Any input on this?
Thanks.
Read my thread with "optics solver link"
link:
http://www.optics-online.com/Image1.asp
Hi,
I have started building my projector for a week and was not sure what type of lens to use. My lcd panel is 10.4 diagonal, I am thinking of using Metal Halide (yet to decide 400W or 1000W) and will build a box from IKEA toy box. The most difficult part is to find a lens and I came across this link. I think its pretty nice so thought to share with all of you.
Link:
http://www.optics-online.com/Image1.asp
My LCD size = 10.4
Screen to LCD distance = 15 feet
using this parameters on the above link, they recommend a plano convex lens of about 300 mm EFL. Any input on this?
Thanks.
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