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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

REDray Projector..

You guys need to take this to IBC in September. Give the rest of us a chance to see it and you will get a chance to show it off in glorious 4K.
 
Zack CC said:
Im really interested to learn more about the actual core functionality and safety of the technology since it certainly sounds like a solid advancement from all that I've been hearing, and I would highly recommend seeing the demo.
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Zack,

there is certainly more to say about safety and regulations, but for now: A classic Xenon or UHP lamp can harm your eyes just the same way as certain laser light sources can. There are all sorts of strange and psychological misconceptions about lasers, but it still is only ONE very specific incarnation of light. Because of their very high coherence, laser light sources can have an extremely high local energy density. But this means at the same time - the moment you add divergence, that means, spread the light through a lens, you lose that harmful energy density. Some laser projection techniques use(d) deflecting mirrors with undiverged laser beams, in a similar way as show lasers. However, in order to project an image onto a screen, the beam has to be scanned over the screen estate with a very high frequency - and with short time exposure, your eyes are safe again, because harming is caused by energy density + time.

Now, even this all only is of concern if you actually look INTO the light beam(s) coming from your projector. The normal use for this kind of gear is to watch the laser light being reflected of a screen. This again reduces local energy density at your eyes to an extent, that noway your eyes can be harmed even when watching it for days.

When watching traditional laser light sources like laser-pointers, etc., people very often associate the typical 'speckle' as some sort of weird and potentially harmful indication of this special and dangerous kind of light. But speckle has nothing to do with harmful energy, but coherence. Even very low power laser light sources show speckle.

Laser projection systems fall under current regulation schemes. But not because they are harmful, they just don't fit into the application scheme of public laser applications like show lasers. The current regulation schemes are simply missing this specific part of laser applications.

The light output of a traditional 2-7kW cinema projector xenon bulb can blind you in a fraction of a second. It's just that no one sees a need for regulation there, because in a typical cinema environment, patrons are never exposed to the light in such a way that it injures them. This way of dealing needs to be applied to the laser regulation schemes for laser displays as well. It just takes some time for the regulatory bodies to respond.


- Carsten
 
Samuel Burton said:
I'm very interested as to wether this will suit an IMAG situation for live shows, what kind of gear I would need to project graphic content direct from a computer, and most importantly, cost of ownership. Lamp life, display engine life, replacement costs etc.
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More specific details on how to do that later, but yes that's certainly a good application for the system.
 
Les Dittert said:
The silver screen I saw today at Red's demo booth had no hot spot, and didn't even look like a silver screen, for that matter.
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The specific screen material we used was Stewart 5D, which is a relatively new product that aims to satisfy both 2D and 3D usage.

It also has a lower gain than typical commercially deployed silver screens - such as Stewart 3D - which makes the brightness of the 3D images even more impressive.
 
Any data available on the noise level of the projector when running? (Fans, etc?)

For those that saw it in person - was it just sitting in the room with you with no noticeable noise? Or was it walled/boxed off?

I'm trying to figure out if I can just ceiling-mount it, or if it will need a "projection box" for noise reduction.
 
Gary Jones said:
You guys need to take this to IBC in September. Give the rest of us a chance to see it and you will get a chance to show it off in glorious 4K.
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You guys really need to bring it to my living room, next month :-)
 
Jarred Land said:
You just add Laser boxes to go up in brightness or go up in size... modular.
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Thanks Jarred but not really what I was getting at. In perfect darkness I don't need as much brightness for vector graphic laser displays. So, with some xalculatiins I should be able to est I ate the effect for a size. So, what is the lux of this thing?
 
Any data available on the noise level of the projector when running? (Fans, etc?)

I'm trying to figure out if I can just ceiling-mount it, or if it will need a "projection box" for noise reduction.
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This question highlights one of the major advantages of the modular design we applied to the projector.

Traditional designs place the lamp in the projector head, it gets hot, and hence you need to put substantial cooling (fans) there too.

In our modular design, the "lamp" is in a rack mount chassis that can be located a considerable distance from the optical head.


So no "projection box" needed.
 
Stuart English said:
The specific screen material we used was Stewart 5D, which is a relatively new product that aims to satisfy both 2D and 3D usage.

It also has a lower gain than typical commercially deployed silver screens - such as Stewart 3D - which makes the brightness of the 3D images even more impressive.
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Aren't those screens (Stewart Silver 5D) like $20k for a 10 foot wide version?
That would mean the screen costs more than the projector.
 
roryhinds said:
Aren't those screens (Stewart Silver 5D) like $20k for a 10 foot wide version?
That would mean the screen costs more than the projector.
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Don't worry. Jarred implied in another post that they'll be making a screen too.
 
saving the arthouse cinemas

saving the arthouse cinemas

Luke Boyce said:
So is RED hoping to appeal to the new digital cinema initiative that Hollywood is imposing? There have been so many articles as of late about how many small theaters in America are going to close because they can't afford the $100k to upgrade their 35mm prints to DCI-approved DCP projectors? Is this something RED is looking at?
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This projector will be a part of a solution to the arthouse cinema crisis at hand. But there needs to be another element. I would love to see RED enabling Film archives to cost effectively transfer valuable but obscure films to redray 4k. Maybe them recycled Mysterium sensors could find a new home in a relatively low priced RED wetgate film-"scanner". Although I'm well aware that proper transfers like that need a fair amount of handholding and are therefore not so cheap.
Yikes just checked prices for arriscan, definitely an area where "pulling a RED" would be welcome.
 
Jarred will the Projector Beable to be Shoot from the rear???
 
Carsten Kurz said:
Zack,

...There are all sorts of strange and psychological misconceptions about lasers, but it still is only ONE very specific incarnation of light. Because of their very high coherence, laser light sources can have an extremely high local energy density. But this means at the same time - the moment you add divergence, that means, spread the light through a lens, you lose that harmful energy density.
Click to expand...


Carsten, thanks for the quick explanation! Any technical papers or sites you could recommend for more in depth reading/understanding? I've done some searches myself and learned a bit, but I'm also interested in really digging in now. Pretty exciting stuff! :D
 
Sorry if I've missed this earlier in the thread but can anyone explain why this projector needs no calibration?
Also has it been revealed what colour spaces it will work in?
 
Both questions have, sa far, been left un-answered.
 
Sorry if I've missed this earlier in the thread but can anyone explain why this projector needs no calibration? Also has it been revealed what colour spaces it will work in?
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Sure, in summary -

Lasers provide the projector a very stable light intensity per primary color.

i.e. it allows us to auto calibrate.



At NAB we were displaying a movie graded for P3 and a some clips graded for REC709.

i.e it's native color gamut is wider than either of those.
 
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