lumens vs Watts?

[norty303]

I just went back to the sound forum I used to moderate, and dug up the thread about video, there is a link on page one for the freeware app that I was referring to earlier. No idea if its still around, but the guys name is quoted there

http://forum.speakerplans.com/using-...145_page1.html

P.S. Its cheaper to buy an FB3 and copy of Beyond than a copy of V3D on its own it appears.


Try this one, still seems to exist:
http://www.ljb2of3.net/lights/lasersim.php

And if your German is ok, look at this (with a zip file in the thread for the software)
http://www.party-pa.de/phpBB/viewtop...613353#p613353

[planters]

However, I am left wondering if laser actually has much of a future.

I agree with norty that because of its brilliance there are applications where the video projector is at such a disadvantage that the laser looks far better. The crossover begins as the complexity rises because a 1W projector with a targeted beam puts all 1W into lets say a 1mrad spot/beam while the 4500 lumen video (6-7W of balanced white) has to block or dump 99.9999% of its output to leave the 1mrad spot/beam to pass the DLP or LCD. As the scanner spreads the laser over an increasingly complex image, especially if raster of "Laser Brush" effects are attempted the brightness goes down while the video projector allows more of its potential through.

My video projector has a 400W HID source and can output a very high contrast brightness at a little over 50% of its rated 4,500 lumens. I looked long and hard at the choices and the DLP projectors are higher contrast than LCD's and none of the projectors I looked at could go much above 50% 0f their rated output before the contrast began to dip. This loss of contrast is seen as a increasing grey appearing where the image should be BLACK. The only projector that produced a higher output was a Christie projector that costs approximately $7,000. The projectors in this range and up begin to use multiple "light engines" and HID sources for each color, cost a fortune and weigh upwards of 50Kg. Nevertheless, effects such as liquid sky are pretty unimpressive because even though the divergence to the focus screen is sub-mrad the beam out of the projection lens is so fat that the liquid sky effect is soft and blurred like it is when you look at the projection booth in a movie theater.

But, for very complex graphics (for example I like the Mandelbrot two and three D videos from YouTube) spliced into and behind a laser image the result is impressive.

[Angelillolaser]

I test 6w rgb laser from rgb laser system ungary into a 3dlp video projector I meausrement 500 Lumens of beautiful color , for 30k lumens you maybe need 36watts

[dar303]

Wait, you did what?! Did you use a 6W laser as light source for a DLP video projector? And it held up for that kind of power? Super cool, I want to try it!

I test 6w rgb laser from rgb laser system ungary into a 3dlp video projector I meausrement 500 Lumens of beautiful color , for 30k lumens you maybe need 36watts

[Angelillolaser]

I use a 3DLP xenon projector, I remove the lamp and power supply, digital porjection 30sx model; I use set xy scanner to scan inside the light integrator to get a full distribution of light in the screen
, fiber optic works too