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The following page was printed from RemoteCentral.com:
Topic: | crossing projectors This thread has 14 replies. Displaying all posts. |
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Post 1 made on Thursday March 18, 2004 at 15:37 |
HTMitch Long Time Member |
Joined: Posts: | November 2003 15 |
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Has anyone crossed projector light paths? I have a church application where I have about a 40ft throw and the projectors light path will cross about 25 ft from the projector. How much quality and light output do I lose if any? Thanks for the help.
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Post 2 made on Thursday March 18, 2004 at 16:06 |
AVXpressions Senior Member |
Joined: Posts: | September 2002 1,163 |
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As long as the light paths cross each other they will not affect each others output. Try this experiment to help you understand.
Take a flashlight and shine it on a wall. Now take a second and shine it through the others on an opposite wall. You will see that neither of the flashlights light output is affected by the two light paths crossing.
Robbie S
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Post 3 made on Thursday March 18, 2004 at 16:11 |
Impaqt RC Moderator |
Joined: Posts: | October 2002 6,233 |
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Now I've never done this, but your example has a flaw in my mind. (I'm not saying the crossing projectors is bad.. I really have no idea.....)
What if you cross a flashlight with a Bluw bulb with a Flashlight that has a Red bulb?
I would think they would not be affected by each other, but that would be a better test in my book.
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Post 4 made on Thursday March 18, 2004 at 16:51 |
Larry Fine Loyal Member |
Joined: Posts: | August 2001 5,002 |
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That's funny! In my opinion, there will be no effect at all. My CRT projector has three light sources that converge at the screen, but don't cause any anomolies where they cross. Larry www.fineelectricco.com
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Post 5 made on Thursday March 18, 2004 at 17:04 |
Impaqt RC Moderator |
Joined: Posts: | October 2002 6,233 |
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Post 6 made on Thursday March 18, 2004 at 17:47 |
AVXpressions Senior Member |
Joined: Posts: | September 2002 1,163 |
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You can cross any two colors you want. They will not affect each other. If they did affect each other you would still see it with white light that's why you can use 2 flashlights in the demonstration.
Focused (directed) light is not interupted by light that runs perpendicular (across) it. Only light that travels in the same path.
Robbie S
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Post 7 made on Thursday March 18, 2004 at 18:13 |
jputtcamp Long Time Member |
Joined: Posts: | June 2002 283 |
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If light 'crossing paths' created anomalies, we would see the world in a very different way.
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Post 8 made on Thursday March 18, 2004 at 18:33 |
QQQ Super Member |
Joined: Posts: | January 2002 4,806 |
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I must disagree. I once had to cross light paths on a high light output DLP and a CRT projector. The result was two horrible bastard offsprings:
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Post 9 made on Thursday March 18, 2004 at 20:50 |
avdude Founding Member |
Joined: Posts: | February 2002 814 |
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QQQ...
my virgin eyes!!!
iiieeeeyyeeeeeeeeeee!!!!!!!
avdude
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AVDUDE "It might work better if it were plugged in and programmed first...just a thought!" |
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Post 10 made on Friday March 19, 2004 at 18:33 |
Greg C Super Member |
Joined: Posts: | October 2002 2,589 |
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Q, I'm glad my kids didn't walk in my office at the time I took a peek! ;-}
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CEDIA University Designer CAT Team Member CEDIA University Instructor CEDIA Registered Outreach Instructor |
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Post 11 made on Friday March 19, 2004 at 20:46 |
bob griffiths Founding Member |
Joined: Posts: | May 2002 1,252 |
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shes got more crack than harlem ;)
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Post 12 made on Saturday March 20, 2004 at 09:39 |
GotGame Super Member |
Joined: Posts: | February 2002 4,022 |
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Egon: There's something very important I forgot to tell you. Venkman: What? Egon: Don't cross the streams. Venkman: Why? Egon: It would be bad. Venkman: I'm fuzzy on the whole good-bad thing. Whattya mean "bad?" Egon: Try to imagine all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light. Ray: Total protonic reversal.... Venkman: Right, that's bad...OK.. important safety tip. Thanks, Egon.
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I may be schizophrenic, but at least I have each other. |
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Post 13 made on Saturday March 20, 2004 at 09:57 |
Jay In Chicago Founding Member |
Joined: Posts: | December 2001 1,658 |
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I the light is not leaving the projected image and messing up the other one, then you will be fine.
If you mix red, green, and blue paint you will get "black" where they mix. The rest will remain red green and blue or some variation depending on the mix.
If you shine red, green, and blue light on a white wall, you will get "white" where they mix. The rest will remain red green and blue or some variation depending on the mix.
Now put a fog machine in the room and you'll have invented holographic projection.
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Jet Rack ... It's what's for breakfast |
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Post 14 made on Saturday March 20, 2004 at 10:25 |
Larry Fine Loyal Member |
Joined: Posts: | August 2001 5,002 |
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Jay, one thing: The primary colors of pigment are red, yellow, and blue. Remember playing with crayons and mixing yellow and blue to get green? Larry www.fineelectricco.com
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Post 15 made on Saturday March 20, 2004 at 15:35 |
HTMitch,
Would you happen to have a mall near you that has the simulated NASCAR racing? If so, go race but more importantly than having fun, look at the three CRT's that they are using for the simulated video. They cross paths and it doesnt seem to effect the video. Anyone else seen these 'games'? I just dont see how crossing the light streams would have an adverse affect on the images being displayed. If you were trying to converge the images from both proj's at the same time you may have issues but IMO you should be fine.
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"Some may never live but the crazy never die" ~ Hunter S. Thompson "There will be plenty of time to sleep when I am dead" ~ Me |
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