can i still make my project work? I have the s15 lenses with the standard kit. as I received them today, I found out that my screen sticks out about 1/2" on either side due to having a 15.4" monitor

Is it possible to use the monitors 'on screen display' and adjust this down and still be able to use these fresnels? Or will it just look messed up and force me to buy different Fresnel's?






*also on another note where can i find info on how far apart to mount Fresnel's, and lcd and distance from bulb, all this endless searching is driving me gonzo

you need bigger lenses from another store like 3D-Lens to fit the LCD. The triplet should work OK. There should be a post stickied that has a calculator to get a general idea of distances. But make it adjustable, real life is not ideal so what the calculator says is just a guide. Someone who has a 15.4 would be able to answer your other question.

waldo686,

Yes, you are going to need to have some larger frensels(frenel) lenses. 3d lens does offer sizes you need

for a 15.4" there are many builders who do the 15.4" and then upgrade to a wuxga laptop screen with a

controler later. This guy pretty much started the 15.4" "wuxga craze"

http://www.lumenlab.com/forums/index.php?s...15796&st=20

Heres the link NinHowFritz was talking about

http://www.lumenlab.com/forums/index.php?a...st&id=21425

Ok I used to focal calc to determine the spot of the lcd, and the front Fresnel location (doing split config). But, it doesn't show the other info like how far from the lcd should the rear Fresnel be, and lexan as well?



rear front
light lexan Fresnel lcd Fresnel
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You can change from a unsplit to split configuration in the upper right corner in FocalCalc.- your lexan is

going to be before your fresnels. You can place them before the rear fresnel. What size rear fresnel do you

have? if you have a 220mm you will place that rear fresnel 220mm away from your arc of your lamp. If 330

330 mm away from amp arc ,ect. Please read basic theory...

Lamp - collimator fresnel: This should be around 220mm, give or take. People play with this distance to get better light diestribution at the triplet.

Lexan will be in between there somewhere, but where isn't critical.

Collimator to LCD: Not critical, but this should be more than 10mm. The reason for this is so that the rings do not make moire patterns appear in the projection. 10-20mm is recommended. (This is also true for a gap between fresnels in a so-called unsplit configuration.)

LCD to collector: Again a minimum gap of about 10mm is needed, but it should be as close the the LCD as possible otherwise. I recommend that the 'far edge' if you are using keystoning should be no more than 25mm from the LCD, and the 'close edge' at not less than 10mm. No, this doesn't give you much correction, but it should be enough.

The focal calculator is really useful for only 2 of the numbers that it provides. Distance from lens to screen vs. screen size. The distance from lens to LCD is useful as well, because it gives you an idea of how long the front half the projector needs to be. The rest of the numbers are really there to get you the important data though.