legato7798. As long as the beams stay in motion and not stationary for too long, they are quite safe if they are "Just Passing" the eyes and not beaming directly into the eye for no longer than about a second or two. Factory made laser units are built so that the beam "Glitches" either up and down or side to side to avoid prolonged eye contact. Great show by the way. Very impressive.
Also you can decrease the power of the 100/200mW lasers and increase the diameter of each point, that's the method that uses the professional high power lasers for making it more secure ;)
Recognize the guy has admitted his mistake and learned. He had the balls to admit it. Good on you mate, great laser system hope you have fun with it. What mod and make is ya system. Is it a DMX style. Love watching the lid of the unit. Great vid.
ur a fucking retard first off as a canadian were not alowed to use lasers over 5MW without a permit Second off the level of lasers could destroy eyes, skin, people and give them huge amounts or raditon.. it's people like u why were not alowed things like this
@splendidsquirrel pardon my language but to me when others do something like this that can indanger others ESPECIALLY when most of those people dont know about laser safty and i dought the guy told his friends the safty issuse of them (because they proble wouldent play in them) it up set's me. I care for humans
@inutiasha The only one time a laser is dangerous is when it hits you in the eye for more than a few seconds. No one is stupid enough to look directly into a laser beam for no longer than a second because of the brightness. It's the same as looking directly at the sun it makes you turn your head to avoid eye damage. As long as the beam is in motion, it is less likely to cause any damage.
@inutiasha Actually your wrong. The USA and Canada have the same regulation. Here in the USA u need to have a Variance for the projector which is usually obtained from the FDA by the manufacture of the projector. Basically it covers collateral light/radiation exposure and makes sure its safe.. A laser that is scanning at 30+ K is not going to do any harm. Its still wise to keep it 9 feet above the audience to prevent any harm in case u have a failure of some sorts.
I think they're cool. Seriously, what is this, the safety patrol on Youtube? Nice work man. Give it up people, at least he's doing something, what are you doing, other than playing laser cop?
I think the "white lasers" are actually IR from the laser, expecially Green laser... when u see the laser with ur eyes and u think its weak and safe for the people, but inface the energy is very intense in the invisible wavelength. Its visable under the camera and now you know how dangerous it was. Always check with a optical power meter (up to 1000nm) before you use laser for shows.
Wow first off yes u can get some bleeding of IR or UV from shitty made Chinese lasers that use shitty optics. Secondly. The lasers pass through filters that only let a certain color through. You can see this when he shows the unit. The chances of bad IR is slim but still needs to pass the light through a IR filter to make sure. On top of that IR stands for infrared. It is such a deep red your eye can not see it. White is not red or blue or green its all 3 primary colors.
and one more thing.... green is no where near IR spectrum. Its actually mid spectrum, the most easily visible color the eye can see that's why night vision optics are green.
@DeisisAndDrosera Yes, green color alone is not near IR spectrum but you know how some green LD are made? For some green laser diode, IR light from a diode laser pumps light at a wavelength of 808 nm into a transparent crystal of Nd:YVO4, causing the crystal to lase into a deeper wavelength at 1064 nm. This energy passes through a crystal of Potassium Titanyl Phosphate (KTP), then emits light half ot the wavelength (532 nm) and become the color of the green laser.
@DeisisAndDrosera Also, not all energy can be prefectly converted into 532nm and some of the 1064nm energy can still pass through. Especially for cheaper and non high end laser diodes, the KTP crystal may not be prefectly aligned and only a little of the 1064nm be converted into 532nm. That inefficiency causes a lot of IR to go out to the diode. Try going to ebay and get a cheap green laser module, hook it up to a power supply and watch the output under a phone camera, you may see IR light.
Love it! Just a shame about all the kneejerk reactions. Just to reinforce things; A scanning beam of this power is not dangerous as it's not in any one place long enough to do any damage, besides, should this moving beam actually hit someone's eye, the blink reflex will protect the eye from any damage or flash blindness. It is to be noted, however that a static beam of this power *is* dangerous, and that there should be safety interlocks in place to prevent this from happening.
Cool projector. I didn't see any specs but I will guess that you're likely putting out enough power to require a CDRH variance. Since you posted this in Jan of 09 I hope that you at least have made enough money to keep things going.
It's bee a long time since I looked into tech specs but I think you need to mount that at least 10 feet off the ground plus have beam cut-off kill switches installed.
you should have put it higher. its not harmfull at that range with the beam diverging but it looks very bright and anoying.keep it higher that thin g blasted like 60 peoples eyes
@sauerland68 This law doesn't apply in all jurisdictions. Crowd scanning is permitted in some countries (like in the UK, which is quite surprising seeing as we're pretty much the 'nanny state' of the world, and have bans on pretty much everything that's even the slightest bit dangerous :) )
Also... You need to get a mechanical shutter and case for your projector.
Regardless of what country you are in, eyes are just as easily damaged in all parts of the world...
I'm not for ruining the show. But if someone were to file suit against you and the courts could easily prove that you had no safeguards on your projector it will be over with before it starts and you CAN lose everything you've worked so hard to obtain. That by itself isn't worth it.
Apparently no one other than you and I (and now the OP) have bothered to read CDRH rules...which I went studied repeatedly for months.
I just got to the point where I gave up. Sure you can do audience scanning, but the divergence and measurements and documentation are ridiculous and tedious.
I gutted my projector and never got back into the hobby, sadly.
United States guidelines state that the projector beams can not fall below 9 feet from the ground.
It's not a matter of passing through us, that would be bad. :)
Basically what you're doing is taking a very narrow beam and making it wide either optically or by use of a high speed scanner pair. The wider the beam, the lower energy (watts per centimeter squared).
I wish it were easier to explain. I understand it in principle only but have never had to actually apply the mathematics.
There is plenty on the web that explains it - and that's the route I'd go.
Ok, but just explain me something... faster the scanner moves wider the beam becomes, so basically can we say that faster the beam passes trough us less energy we get from it, so it's less hazardous? or there is something more than the speed that the beam angle is changed?
I do understand that about the lens/optical diverging (spreading).
Now, I admit that I was not very wise to do audience projections with this system. Even though I took care to chose only animations that had fast moving beams, I should have aimed way up above the heads. No one got injured. After that show, I did only two others, but did not aim at the crowd anymore.
I do not plan to do shows anymore since I am concentrating on consultation projects.
It's obvious from the power levels you listed that the stray beams constantly hitting the audience could cause damage if looked at. Did your audience know the dangers? I certainly hope so. Nevertheless it's illegal to have beams lower than 3 meters to the floor. I wouldn't recommend doing something like that again without following the CDRH guidelines or those set forth by your local legislator if your outside of the US.
That looks great!, the while balance is just perfect. I wish I could afford to build a system that good. Shame you could not switch off those crappy festoon lights that are lighting all the room up.
Awsome! It was always my dream to build something like this some day :) And I'm pretty close to do it :D If I used argon laser or bluray diode instead of blue DPSS then I need only dichros with mounts and some free time :)
Oh mein gott vieviele leute werden bei dieser Show wohl erblindet sein. Ey wenn man keine ahnung hat sollte man die finger von leser lassen das ist sau gefährlich so nah wie der laser da den leuten in die augen scheint
lol du witzbold nur weil man sich mal vertippt kommt sofort ne blöde antwort so leute kann ich echt gut leiden! wenn du mal schaust hab ich unten nochmal laser im text und da ist es richtig du nase !!
There's a risk some of your guests have suffered retinal burning. At 2 mins 23 secs you have a guy within what appears to be 2 feet of the aperture on full white. Some patterns are also quite concentrated. 500mw is not eye safe without MPE calculations which are extremely complex and require special training. Your own ebay ad for 170mw driver says "The output is quite impressive at 170mW white. The collimated (not focused) beam can pop yellow balloons almost instantly, and will burn your skin!"
I agree. Dude, please don't blind people. 550mw is too much to be shining in people's eyes. I doubt you calculated dwell-time for every frame of your show. Nice projector though.
Looks dangerous to me. open scanners, into the audience beams, open electrical circuitry and I imagine the list goes on. whats the fda accession number? The projection zones are in your face. nice toy though. Obviously you are not in USA
not safe to look at for very long but the human mind will tell you took look away after only a fraction of a second anyways, plus the optics are moving a lot.
I think the point of this is that so people can actually have these. Not many people want to throw $4k or more at a pro job... when we all know damn well, it only cost them a couple hundred to make them.
Even with the low quality of the video you get a sense the visual effects of this projector are out of this world Legato! Especially when they lower the lights! Everything a party animal like me is looking for in a laser show! Every decent nightclub owner should contact you! Keep up the good work!!!
c'est trés bien fait , j'aimerais beaucoup l'avoir
thomasdrety 21 hours ago
where can i get plans and how much they cost
coolLightspro 1 month ago
did you make galvos yourself?
wowerman 1 month ago
cool laser show man!
Mackaveli7 2 months ago
I'm going to make an IR laser scanner than people watch through their iPhones. xD
gothmael 2 months ago
hello, where you bought this lens to make the rgb?
imasdpic 3 months ago
beautiful laser system, I'm also building a similar, the audio track at 0:23 is REAL MCCOY ANOTHER NIGHT-.
divuzzola1 3 months ago
hmmm .. how can i add another scanner to my rgb system ?
JSprayaEntertainment 4 months ago
beautiful done!!!!!
DJsonnyANTWERPEN 4 months ago
2:32 I love that melody :D Could you give me the name track? : )
knopeck 4 months ago
legato7798. As long as the beams stay in motion and not stationary for too long, they are quite safe if they are "Just Passing" the eyes and not beaming directly into the eye for no longer than about a second or two. Factory made laser units are built so that the beam "Glitches" either up and down or side to side to avoid prolonged eye contact. Great show by the way. Very impressive.
DJPaulgee1 5 months ago
What's the last song? :D
TecnoVirtu 7 months ago
@TecnoVirtu World, Hold On (David Guetta & Joachim Garrard Remix)
=^_^=
Grandremone 6 months ago
@Grandremone Thank you! :)
TecnoVirtu 6 months ago
perfect
cevizlidagi 8 months ago
Also you can decrease the power of the 100/200mW lasers and increase the diameter of each point, that's the method that uses the professional high power lasers for making it more secure ;)
TecnoVirtu 10 months ago
Dangerous but very nice! :P
TecnoVirtu 10 months ago
Recognize the guy has admitted his mistake and learned. He had the balls to admit it. Good on you mate, great laser system hope you have fun with it. What mod and make is ya system. Is it a DMX style. Love watching the lid of the unit. Great vid.
damiencheryl 1 year ago
Inutiasha, he did not use MW lasers, only mW, but I agree that even that is dangerous to anyone that stands more than a few secs in front of it.
TheSilentwarrior99 1 year ago
ur a fucking retard first off as a canadian were not alowed to use lasers over 5MW without a permit Second off the level of lasers could destroy eyes, skin, people and give them huge amounts or raditon.. it's people like u why were not alowed things like this
inutiasha 1 year ago
@inutiasha there is actually no legal power regulation for lasers in Canada. Try to talk more politely to others
splendidsquirrel 7 months ago
@splendidsquirrel pardon my language but to me when others do something like this that can indanger others ESPECIALLY when most of those people dont know about laser safty and i dought the guy told his friends the safty issuse of them (because they proble wouldent play in them) it up set's me. I care for humans
inutiasha 7 months ago
@inutiasha The only one time a laser is dangerous is when it hits you in the eye for more than a few seconds. No one is stupid enough to look directly into a laser beam for no longer than a second because of the brightness. It's the same as looking directly at the sun it makes you turn your head to avoid eye damage. As long as the beam is in motion, it is less likely to cause any damage.
DJPaulgee1 5 months ago
@inutiasha Actually your wrong. The USA and Canada have the same regulation. Here in the USA u need to have a Variance for the projector which is usually obtained from the FDA by the manufacture of the projector. Basically it covers collateral light/radiation exposure and makes sure its safe.. A laser that is scanning at 30+ K is not going to do any harm. Its still wise to keep it 9 feet above the audience to prevent any harm in case u have a failure of some sorts.
DeisisAndDrosera 5 months ago
might wanna cut the crowd scanning out just a little
jimiwho06 1 year ago
I think they're cool. Seriously, what is this, the safety patrol on Youtube? Nice work man. Give it up people, at least he's doing something, what are you doing, other than playing laser cop?
M1Interactive 1 year ago
I think the "white lasers" are actually IR from the laser, expecially Green laser... when u see the laser with ur eyes and u think its weak and safe for the people, but inface the energy is very intense in the invisible wavelength. Its visable under the camera and now you know how dangerous it was. Always check with a optical power meter (up to 1000nm) before you use laser for shows.
SniperPIKACHU 1 year ago
@SniperPIKACHU
Wow first off yes u can get some bleeding of IR or UV from shitty made Chinese lasers that use shitty optics. Secondly. The lasers pass through filters that only let a certain color through. You can see this when he shows the unit. The chances of bad IR is slim but still needs to pass the light through a IR filter to make sure. On top of that IR stands for infrared. It is such a deep red your eye can not see it. White is not red or blue or green its all 3 primary colors.
DeisisAndDrosera 5 months ago
and one more thing.... green is no where near IR spectrum. Its actually mid spectrum, the most easily visible color the eye can see that's why night vision optics are green.
DeisisAndDrosera 5 months ago
@DeisisAndDrosera Yes, green color alone is not near IR spectrum but you know how some green LD are made? For some green laser diode, IR light from a diode laser pumps light at a wavelength of 808 nm into a transparent crystal of Nd:YVO4, causing the crystal to lase into a deeper wavelength at 1064 nm. This energy passes through a crystal of Potassium Titanyl Phosphate (KTP), then emits light half ot the wavelength (532 nm) and become the color of the green laser.
SniperPIKACHU 4 months ago
@DeisisAndDrosera Also, not all energy can be prefectly converted into 532nm and some of the 1064nm energy can still pass through. Especially for cheaper and non high end laser diodes, the KTP crystal may not be prefectly aligned and only a little of the 1064nm be converted into 532nm. That inefficiency causes a lot of IR to go out to the diode. Try going to ebay and get a cheap green laser module, hook it up to a power supply and watch the output under a phone camera, you may see IR light.
SniperPIKACHU 4 months ago
white laser?
a217andy 1 year ago
Love it! Just a shame about all the kneejerk reactions. Just to reinforce things; A scanning beam of this power is not dangerous as it's not in any one place long enough to do any damage, besides, should this moving beam actually hit someone's eye, the blink reflex will protect the eye from any damage or flash blindness. It is to be noted, however that a static beam of this power *is* dangerous, and that there should be safety interlocks in place to prevent this from happening.
ChayD 1 year ago 2
Nice work! dont listen to those negative remarks you know what your doing fast scanning = blink safe = ok :-) tho try not to make a habit of it :-)
GILASERS1 1 year ago 7
GOOD JOB TRYING BLIND PEOPLE ASS HOLE
893165009 1 year ago
BGVB2 ?????????
Cetus89 1 year ago
What is the second song?
electfire 1 year ago
Wow *bomb* yep that was my mind .
gehtomacgyver 1 year ago
i wont give this guy a laser... we all see the shit he does with the laser...
hoersterCLAN13 1 year ago
What a novice :o(
XysteRST205 1 year ago
voll auf augenhöhe....
flyteam15 1 year ago
Argh doh! Sorry for not reading.. LOL..
tdneVmo 1 year ago
Hey, i think you should move the laser closer to the ceiling. The beams will travel further because they dont hit people standing in the front.
Don't think lazer light have good influence on you eyes either :)
tdneVmo 1 year ago
That party would be the shit cool light show, minus the DANGEROUS BURNING lasers that could INCINERATE the house and blind people :S
Kage999 1 year ago
Cool projector. I didn't see any specs but I will guess that you're likely putting out enough power to require a CDRH variance. Since you posted this in Jan of 09 I hope that you at least have made enough money to keep things going.
It's bee a long time since I looked into tech specs but I think you need to mount that at least 10 feet off the ground plus have beam cut-off kill switches installed.
YDsixstring 2 years ago
LaBouche.. LOLz.
dyjital 2 years ago
you should have put it higher. its not harmfull at that range with the beam diverging but it looks very bright and anoying.keep it higher that thin g blasted like 60 peoples eyes
iminyourbasement 2 years ago
too close to people. :( the room isnt big enough for that powerful of a laser show
zenith828 2 years ago
RGB and aqua
bucketheadteacher 2 years ago
DANGER DANGER For the Eys.!!!
This is willful bodily injury!
at least 2.7 m above the ground and no standing beams scan the audiens.
sauerland68 2 years ago 24
@sauerland68 You cant injur anywone with a weake laser like that.
tmp707 1 year ago
@sauerland68 This law doesn't apply in all jurisdictions. Crowd scanning is permitted in some countries (like in the UK, which is quite surprising seeing as we're pretty much the 'nanny state' of the world, and have bans on pretty much everything that's even the slightest bit dangerous :) )
ChayD 1 year ago 2
whats the general life-span of low end (i.e. £100-£1000) lasers?
mikey9204 2 years ago
@mikey9204 depends where you buy..... I know a less than 20 pound (money) red laser@ >200mW that could last a few years.
ossumguywill 2 years ago
that is one shitty partyXD awesome laser stole the show
rockpop316 2 years ago
wery nice done but why is beam not spread more?
jigibao 2 years ago
@jigibao because it needs a lens..
molinobeer 2 years ago
a ok...i must admit good done laser sisteem..
jigibao 2 years ago
Hey can you make RGB laser projectors to display specials and names, logos n such?
what all would I need?
oh' btw nothing is listed on your ebay today..
rulesofethics 2 years ago
gieb halt an
blutbrothers 2 years ago
Also... You need to get a mechanical shutter and case for your projector.
Regardless of what country you are in, eyes are just as easily damaged in all parts of the world...
I'm not for ruining the show. But if someone were to file suit against you and the courts could easily prove that you had no safeguards on your projector it will be over with before it starts and you CAN lose everything you've worked so hard to obtain. That by itself isn't worth it.
pmgodfrey 2 years ago
how to cry... people that get blinded by lasers are the ones that cry. :D
Just sayin'.
pianoman22222222 2 years ago
- @ planoman22222222 -
Apparently no one other than you and I (and now the OP) have bothered to read CDRH rules...which I went studied repeatedly for months.
I just got to the point where I gave up. Sure you can do audience scanning, but the divergence and measurements and documentation are ridiculous and tedious.
I gutted my projector and never got back into the hobby, sadly.
United States guidelines state that the projector beams can not fall below 9 feet from the ground.
pmgodfrey 2 years ago
if you use class 1 lasers you can scan audience without worrie about reading that.. right?
molinobeer 2 years ago
- @ molinobeer -
Yes, but with a Class I laser - but that would not produce a bright beam.
You can scan an audience with a 30 Watt Class IV as long as you have calculated maximum permissible exposure (MPE) and you're beam is diverged enough.
You would be looking at exposure times without divergence in the range of 0.001 seconds. You can't do crap with a beam in that time frame.
If your eyesight is still recovering from the last exposure when a new beam sweeps by, then it's too much power.
pmgodfrey 2 years ago
Uh... i'm understanding.. so, with diverged beam, you mean he passes trough us very fast right?
...and is that simple, calculate the MPE?.. :S
molinobeer 2 years ago
- @ molinobeer -
It's not a matter of passing through us, that would be bad. :)
Basically what you're doing is taking a very narrow beam and making it wide either optically or by use of a high speed scanner pair. The wider the beam, the lower energy (watts per centimeter squared).
I wish it were easier to explain. I understand it in principle only but have never had to actually apply the mathematics.
There is plenty on the web that explains it - and that's the route I'd go.
pmgodfrey 2 years ago
Ok, but just explain me something... faster the scanner moves wider the beam becomes, so basically can we say that faster the beam passes trough us less energy we get from it, so it's less hazardous? or there is something more than the speed that the beam angle is changed?
I do understand that about the lens/optical diverging (spreading).
molinobeer 2 years ago
Hi to all, and thanks for posting comments.
Now, I admit that I was not very wise to do audience projections with this system. Even though I took care to chose only animations that had fast moving beams, I should have aimed way up above the heads. No one got injured. After that show, I did only two others, but did not aim at the crowd anymore.
I do not plan to do shows anymore since I am concentrating on consultation projects.
BTW, I'm in Canada.
legato7798 2 years ago 2
It's obvious from the power levels you listed that the stray beams constantly hitting the audience could cause damage if looked at. Did your audience know the dangers? I certainly hope so. Nevertheless it's illegal to have beams lower than 3 meters to the floor. I wouldn't recommend doing something like that again without following the CDRH guidelines or those set forth by your local legislator if your outside of the US.
pianoman22222222 2 years ago
stop crying dickhead
fretalian 2 years ago
That looks great!, the while balance is just perfect. I wish I could afford to build a system that good. Shame you could not switch off those crappy festoon lights that are lighting all the room up.
Martinfreekie 2 years ago
Awsome! It was always my dream to build something like this some day :) And I'm pretty close to do it :D If I used argon laser or bluray diode instead of blue DPSS then I need only dichros with mounts and some free time :)
c4r0hv 2 years ago
Oh mein gott vieviele leute werden bei dieser Show wohl erblindet sein. Ey wenn man keine ahnung hat sollte man die finger von leser lassen das ist sau gefährlich so nah wie der laser da den leuten in die augen scheint
floz0815 2 years ago
auch wenn du sicherlich recht hast, solltest du auch erstmal lernen, wie man laser schreibt ;)
oliverlauta 2 years ago
lol du witzbold nur weil man sich mal vertippt kommt sofort ne blöde antwort so leute kann ich echt gut leiden! wenn du mal schaust hab ich unten nochmal laser im text und da ist es richtig du nase !!
floz0815 2 years ago
There's a risk some of your guests have suffered retinal burning. At 2 mins 23 secs you have a guy within what appears to be 2 feet of the aperture on full white. Some patterns are also quite concentrated. 500mw is not eye safe without MPE calculations which are extremely complex and require special training. Your own ebay ad for 170mw driver says "The output is quite impressive at 170mW white. The collimated (not focused) beam can pop yellow balloons almost instantly, and will burn your skin!"
RGBLaserFan 2 years ago
Jesus Christ Man !!! Thats a little too bright for peoples eyes at that short of a distance. I hope you lower your crowd scanning intensity !
normellow 2 years ago 2
Comment removed
likmahchoda 2 years ago
whats the title of the last song? (from 3:00 to the end)
oliverlauta 2 years ago
What is the name of the second song (0:23)
angel4eto96 3 years ago
that crowd scanning doesn't look too safe ! O.o
DiachiLaser 3 years ago
I agree. Dude, please don't blind people. 550mw is too much to be shining in people's eyes. I doubt you calculated dwell-time for every frame of your show. Nice projector though.
buffLaser2000 3 years ago
what is dwell-time?
molinobeer 2 years ago
...when audience scanning is done, it's usually only with a few specifically made patterns for which dwell-time can be easily calculated.
buffLaser2000 3 years ago
Yeah, you really need to know what your doing ! If you blind someone you'll end up getting sued, so I hope you have your ass covered !
DiachiLaser 3 years ago
Looks dangerous to me. open scanners, into the audience beams, open electrical circuitry and I imagine the list goes on. whats the fda accession number? The projection zones are in your face. nice toy though. Obviously you are not in USA
djtraximus 3 years ago
not safe to look at for very long but the human mind will tell you took look away after only a fraction of a second anyways, plus the optics are moving a lot.
I think the point of this is that so people can actually have these. Not many people want to throw $4k or more at a pro job... when we all know damn well, it only cost them a couple hundred to make them.
gtq838 2 years ago
yeah but you wont be able to do 3d animations and line up the laser crossings like the ones you buy, its just not possible by hand
908205691838 2 years ago
please some one tell me the song at 2:40
SoundMastersEnt 3 years ago
the song is funkytown by lips (1975 or 1976)
toastdore 3 years ago
Even with the low quality of the video you get a sense the visual effects of this projector are out of this world Legato! Especially when they lower the lights! Everything a party animal like me is looking for in a laser show! Every decent nightclub owner should contact you! Keep up the good work!!!
UFPVP 3 years ago 2