Senior Member
Have read both of thos and they did solve alot of questions but am still looking for a clearer setup
Your set up looks nice ElektroFreak, can you possibly get me more closer pic of it and of the safety features also?
Was wondering the same thing about the PSU as mine is a FDA complaint one with the key and emission light
adOriginally Posted by ElektroFreak
Electro:
Just because the PSU is compliant doesn't mean the whole projector is. When you start with a compliant laser, all you have is an accession number for that laser. That helps some, but when you build it into a projector, you now need to certify the entire projector, since it is a new product. That means a new laser product report. (ugh!) You will of course reference the accession number of the laser you used when you fill out your new laser product report for the whole projector.
As for whether you can use the original PSU's keyswitch and emission indicator to satisfy the requirements for the entire projector, I really can't say for certain. My *guess* would be yes, but I'd check with the CDRH to be sure. And of course, this only applies when the projector only has that one single laser PSU...
Also, you'll still need an interlock circuit, a remote kill switch, and proper labels of course.
F22:
A variance is your official "OK" from the CDRH to use the projector for commercial shows. Your variance application needs to describe all the things that you will do to ensure audience safety, including diagrams of how the beams will be positioned to keep them out of the audience. Once approved, so long as you perform the show as you've described it in the variance application, you are OK. Most variance applications list two or three generic laser show layouts. (Rear projection through a scrim, front projection on a screen, and beams overhead, plus maybe targeted beams on bounce mirrors.) Also, if you file an annual report listing the shows you've done for the year under a given variance, and include any exceptions or incidents that occurred, the CDRH will automatically renew your variance.
As for FLEM, if you think you can make it, I'm sure we can get you a ride... We've got at least 4 members that live within an hour's drive of the Orlando airport.Let us know what your plans are and we'll work something out!
The "initial product report" is in fact the laser product report, and yes, you need one of those before you can file for a variance. (Well, technically you can file both at the same time if you want.) The laser product report form itself is 34 pages long, but by the time you add all the supporting documentation (schematics, block diagrams, other illustrations, label samples, and a copy of the user manual, which you also need to write), it usually ends up being somewhere between 40 and 60 pages long.
Remember, you are building the projector from scratch. That means *you* are a laser product manufacturer. You are the one certifying that the projector meets all the requirements of the Code of Federal Regulations. Thus, you have to follow the same rules that the folks making lasers for eye surgery do. (Sounds like fun, doesn't it?)
True, you are also the only one who will ever use it, and because of that there are a few things that you can exempt yourself from if you want. For example, laser projectors are required to have a case-intrusion interlock that prevents exposure to laser radiation if the case is opened while the power is on. Since you *built* the thing, you are protecting yourself from yourself! So this requirement can be exempted... Nevertheless, you still need to file all the paperwork.
The good news is that the CDRH likes to see people following the rules, and they do recognize that there's a difference between a 20 watt surgery laser and a 500 mw projector. So it's not as hard as it first looks.
Note also that you can include various features in a single projector "model", and write one "manual" (and thus one product report) for all of them. For example, a projector with all the standard safety features might have a green-only laser (at 532 nm) with a power level from 100 mw to 5 watts. Or the same projector might have 3 different lasers at 635 nm, 532 nm, and 473 nm, with individual laser power ratings from 100 mw to 2 watts, and a maximum output power of not more than 5 watts. That sort of thing... The only things that really change are the warning labels.
Adam
THIS USER WAS CLUEBYFOURED
Thanks buffo! That's very helpful.
I'll try to take some closeup pics of the front, but it's not too easy to open things up for a full inside view..
Senior Member
Yest thank you for all your information..... just wondered tho what if you copy somebody else complaint laser show system could you use their work?
THIS USER WAS CLUEBYFOURED
Most of the commonly found configurations are shared between many people. As long as a configuration isn't a patented trade secret (which you wouldn't - or at least shouldn't - see posted here anyway) there's no reason to not put it to use IMO.
Exactly. Most of us are borrowing design ideas that were implemented by professional laserists 15 to 20 years ago. You still have to fill out your own paperwork, of course, but your projector will probably end up looking (and functioning) a lot like a professional rig. The CDRH is fine with that.
In fact, you can purchase pre-certified enclosures for your projector. True, you still need to file a modified product report once you install the lasers and scanners, but the fact that the box has an accession number that you can reference makes things a bit easier on you. Of course, the trade off is that these pre-certified boxes are expensive as hell! But it is an option... (Personally, I think anyone with the patience to read through the regs can figure out the laser product report and file it themselves - especially with all the help available here on PL.)
Adam
Senior Member
fdsafdas
Just wondering but where do you get GM-20 safety shutters? Or even just the silionide to build a safety shutter?
They show up on e-bay from time to time for anywhere from $45 (great deal) to $110 (retail). Also, OneStopLaserShop.com sells a clone of the GM-20 that works well.
Ledex rotary solenoids are another option, though they are noisy. Any decent electronics house will have them. (Digikey, Mauser, maybe even allelectronics.com if you're lucky.) They also show up on E-bay...
Adam
Senior Member
Right here: http://www.microlaserlabs.com/produc...pt68hgv946sco1
-Adam
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Laser (the acronym derived from Light Amplification by Stimulated Emissions of Radiation) is a spectacular manifestation of this process. It is a source which emits a kind of light of unrivaled purity and intensity not found in any of the previously known sources of radiation. - Lasers & Non-Linear Optics, B.B. Laud.
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