REDray Projector..

[Gary Jones]

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.

[Carsten Kurz]

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.

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

[Stuart English]

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.

More specific details on how to do that later, but yes that's certainly a good application for the system.

[Stuart English]

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.

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.

[Michael Stone]

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.

[Wayne Morellini]

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.

You guys really need to bring it to my living room, next month :-)

[Wayne Morellini]

You just add Laser boxes to go up in brightness or go up in size... modular.

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?

[Stuart English]

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.

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.

[roryhinds]

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.

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.

[brett ogden]

You mean you'll send one to Denmark for me to beta test? ;-)

Tony I asked First to beta Test