ScienceFreak Posted February 17, 2006 Posted February 17, 2006 Ok you guys got to get one of these!!! I just bought one, and these lasers are bad!!! you guys got to get one!!! Go here and check them out: http://wickedlasers.com/index.php?promo=4433 This is great to do experiments with..... And study... You can touch the sky with this thing.... Only two AAA batteries power this thing, you got to see it for your self... If you guys do buy one use this promo code: 4433 and use the add to basket button.... But if you click on the link above you should already have it activated.... THIS WILL GIVE YOU 5% OFF YOUR LASER!!! These thinks are bright!!! You can point out stars in the sky with it.... And it can burn stuff..... If any of you get one keep me up posted on your experiments and any ideals you come up with.....
5614 Posted February 17, 2006 Posted February 17, 2006 They're expensive! I've got a 5mW green laser and a collection of red ones, but nothing like 15, 35 or 300mW. You are only legally allowed to own up to 5mW without a license, I think. Besides this is advertising which you're not really meant to do on SFN.
swansont Posted February 17, 2006 Posted February 17, 2006 My green laser (V10) can beat up your green laser.
Lance Posted February 17, 2006 Posted February 17, 2006 My green laser[/url'] (V10) can beat up your green laser. That is unreal. Looks like it could rival a small CO2 laser. I think I want one.
Super Genius Posted February 17, 2006 Posted February 17, 2006 That is fascinating! I did not know that they sold lasers that can burn objects, to the general public.
ScienceFreak Posted February 17, 2006 Author Posted February 17, 2006 I know when I first saw this site, I was like WOW! I have to get me one of these things! and I was glad I did I first bought a 15mW and know I just bought a 75mW; I can not wait to check it out. The Forum that they have on there website, also has some great people in there that are GREAT to talk with, very helpful! Sorry if this looked like advertising, but I wanted to see if we could get a nice discussion going on here about lasers and neat experiments on these powerful coherent beams! Like I said they have a nice Forum over on there website but I wanted see what you guys could come up with (you know different minds) And ya I know they are a little price, but that is why I also gave you the promo code, which will help you out a little...
Klaynos Posted February 17, 2006 Posted February 17, 2006 Depending on what country you're in they're likely to be illegal :\
YT2095 Posted February 19, 2006 Posted February 19, 2006 erm, I have a 640nm 50mw laser here, so Im breaking the law Stoopid Law then!
5614 Posted February 20, 2006 Posted February 20, 2006 I want a 50mW one! Where did you [YT] get yours from? If only I had a few hundred pounds/dollars to buy a 100mW laser... Swansont; Don't bully my laser! And how much did your one cost? Is it one at where you work?
YT2095 Posted February 20, 2006 Posted February 20, 2006 eBay, cost me £24.00 total, and included the 115ma power regulator and optics.
Klaynos Posted February 20, 2006 Posted February 20, 2006 erm' date=' I have a 640nm 50mw laser here, so Im breaking the law Stoopid Law then! [/quote'] That'd be a class 3R laser. There's no specific laser laws in the UK, but there are general public safty and general sales saftey laws which have been argued to cover this. And the current guidelines say you shouldn't sell anything over 5mW I think.... Althouth my memory on this is a big sketchy :| According to the guidelines if that was a laser in a work place you would not have to appoint a safty person for it because it's inside a certain set of wavelengths. And it's not a stupid law anything over and including a 3R laser can cause damage to the eye by very short term accidental viewing....
5614 Posted February 20, 2006 Posted February 20, 2006 eBay won't sell anything over 5mW now, however there are a bunch of mod kits and people who say "once the transaction is complete I could mod it for extra $$$"... how good are these increase-power kits and even if someone else did it for you how does a 5mW laser react to being changed to 10mW??? 3R laser? Do you mean IIIb or 3b? I've never heard of 3R. This is what I've always gone by: http://ehs.uky.edu/radiation/laser_fs.html
MulderMan Posted February 21, 2006 Posted February 21, 2006 What are some good experiments that can be done with these lasers (links?)? Im interested in buying one, but id like to know what can be done apart from satisfying my ammusement...
5614 Posted February 21, 2006 Posted February 21, 2006 Dunno where I got this from, but I saved it in my stuff.txt file on my desktop coz it's really cool and I wanna do it some day! I did a demo in my lab in grad school - took a boom box output' date=' modulated a laser diode (780 nm), sent the light across theroom to a photodiode, sent the output into another boom box and played the music. I thought it was one of the coolest things I'd seen. Aside from setting up the laser system (which had happened already) it only took a few minutes plus the time to wire a BNC-RCA cable.[/quote']If you had a green laser in a dark room you could actually watch your sound being transmitted across the room encoded in the laser beam, how coool!?! From here: http://www.geocities.com/Tokyo/Harbor/2308/ When giving presentations, you can use your laser pointer to point out certain things on the overhead projector. Instead of getting in everyone's way by normally using your hand or a pen, stand back, and use your laser pointer and let the red dot do all the guiding.If you work in construction or your an architect, use the laser to point out certain things of your project that are normally out of reach. If you are a weather man, i've seen people use them on TV to point out things on the map when they tell us the weather. If you are a doctor, use laser pointer when showing x-rays print outs. If you are a teacher, you can use them to point things out on the black board or around the class room. For law enforcement, we use them to point out things at crime sceens where we normally can't go. Or use them to show for example: Where the criminal ran or the window the criminal escaped from...etc. I dunno what really useful things the average person can do with one, but they're soo cool... love lasers!
ScienceFreak Posted February 21, 2006 Author Posted February 21, 2006 Well for starters go here: More Than 101 Ways to Use a Laser Hope this is engouh ways Great Idea 5614!!! Keep them coming!
YT2095 Posted March 9, 2006 Posted March 9, 2006 eBay won't sell anything over 5mW now' date=' however there are a bunch of mod kits and people who say "once the transaction is complete I could mod it for extra $$$"... how good are these increase-power kits and even if someone else did it for you how does a 5mW laser react to being changed to 10mW??? 3R laser? Do you mean IIIb or 3b? I've never heard of 3R. This is what I've always gone by: http://ehs.uky.edu/radiation/laser_fs.html well that`s Odd because I can still loads of lasers well above the 5mw range, also I`ve had a 100mw Hitachi laser at 650nm visible red that`ll cut things up quite nicely, but much prefers Black/Green or Blue surfaces, as for the green lasers they can very often be turned up well beyond their rated power they`re sold at often a ten fold increase is easily done in about 5 minutes. the interesting thing with my 650nm is that it doesn`t Look much brighter than my 625nm at 5ma, and yet it cut/burn with ease, funny how the eye works
swansont Posted March 9, 2006 Posted March 9, 2006 the interesting thing with my 650nm is that it doesn`t Look much brighter than my 625nm at 5ma, and yet it cut/burn with ease, funny how the eye works Your eye is most sensitive around 550-575 nm, so as you move away from that the same power will appear dimmer. That's the difference between radiance and luminosity; the latter is normalized to our eye's response (i.e. how bright something appears to us, rather than how much energy it puts out) 625 vs 650 is about a factor of two in sensitivty. And if the spot size isn't the same, you have to account for that, too. Plus, they eye's response to intensity may not be linear.
Glider Posted March 9, 2006 Posted March 9, 2006 You're right, it isn't. The eye's response to intensity is logarithmic. A stimulus luminance needs to be 10 times as intense to appear twice as bright. This is what gives us the massive functional range of light intensity.
YT2095 Posted March 9, 2006 Posted March 9, 2006 well when I take my 650nm down to a pin spot to cut things (plastic cups etc...) I need to wear sunglasses, you get serious long lasting "Spots" in your eyes after if you don`t (I only did that once and it`s gone now after about half an hour from 15 seconds exposure). however when I make the beam colminated (as my 625 is) there`s very little difference in brightness. I noticed that a few year ago with an IR laser, all you can actualy see is a tiny tiny red dot in the actualy laser semiconductor itself (I actualy thought it wasn`t working properly at the time) even at IR, you`ll still get visual distortion that lasts many hours (mine lasted a day or so and still isn`t 100% resolved yet). as Swansont said Radiance and Luminosity are entirely different beasties!
swansont Posted March 9, 2006 Posted March 9, 2006 Just remember this important laser safety tip: Do not look into laser with remaining eye.
ScienceFreak Posted March 10, 2006 Author Posted March 10, 2006 Yes, do be careful! with lasers!! You only got two eyes!! Take care of them! Laser power magnified by the eye: http://www.pbase.com/image/52123863/original.jpg Laser eye injuries: http://www.pbase.com/image/52123862/original.jpg
YT2095 Posted March 10, 2006 Posted March 10, 2006 actualy I need to correct something here, the laser wavelength is 665nm not 650nm as I stated before (I just read the data sheet again). as for safety I have an old pair of sunglasses with clip on color filters, I use Green filters for the reds.
anglepose Posted March 14, 2006 Posted March 14, 2006 I HAVE GOT TO GET ONE WOW ill burn everything lol not really ittll be gd fer experiments i mean reli gd fer them and i might take it to a rock consert fer kicks
YT2095 Posted March 15, 2006 Posted March 15, 2006 an interesting Test I`ve just discoved today, is to get some Thermal Printing paper, the sort used on Fax machines or some till rolls, you can identify it easily enough by quickly brushing a cigarette under the paper and it should turn Black instantly on the one side. then you get a green or blue marker pen on the back of the paper and make a large mark on it, then you power up your laser and write something on the marker pen side, if your laser`s powerfull enough, it`ll print out what you wrote on the thermal side in Black Dont try it directly on the white surface though without suitable eye protection, a good 50%+ of the beam energy will bounce back directly at you!
YT2095 Posted June 12, 2007 Posted June 12, 2007 *Bump* I just bought a pair of 532nm 50mw green lasers unmodified they`re DPSSFD types, so I`ll keep one as it is and plan on taking the crystals and filter out the other to leave a 808nm 350mw IR laser pump diode. doesn`t anyone know if this can be colminated directly?
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