Lazer light pens

pacef8

pacef8

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Gary
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Hello everyone, i,m after some of those little maglite style lazer lights that shine out a thin beam , i know they have been used for bad things in the press but i,m after some for night/underground photography, not bringing down police helicopters etc/

An red/orange and a green one would be cool.

cheers all

pace:shrug:
 
You can get them off ebay for very little.......the cheap ones usually use 3 little button cells though, each of which costs about as much as the laser pen itself, so if you get a bigger and slightly more expensive one (I think they're about £8), they use normal AAs and will be cheaper in the long run! I've seen red and green ones, not too sure about orange though!

Chris
 
Hi pacef8

I've got a few spare red ones that are built into the tops of pens, the sort you would use for presentations.

If you wanna send me your address I'll pop one into the post for you mate
Leon
 
Thats interesting, i have been after one of these for an up and coming slide show i have to do for our local history.

I thought ebay had removed these because of the problems they have been causing at football matches....seems not.
 
Green ones on deal extreme start at about 13 dollars. Red ones for about 2, the blue & purple seem to be more expensive.
 
Well ,ive touched a nerve here for sure.
yes ebay does sell them but they sell the crap ones that do not show the beam.
over powered but all the ir taken out.
these are not toys either.
so no mucking about with them.

pace
 
Matt T said:
Oh and a word of warning, these things will zap camera sensors (and your eyes) in a second, so be careful with it!
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Not doubting you, but does it really mess up your camera sensor?
 
whatever you can legally buy is probably not worth buying. unless its just for putting a little light on something. long exposures. maybe i dont know. my brother brought one back from thialand and i never knew that it was physically posibble to do what it did. put a reasonably big dot on a house wall a good half mile away. (live top of a hill. hints i can see down)
and that wasnt even the most powerfull one they had on sale over there.
preferably find a dodgy market/ undercounter shop. ebay is full of people looking for idiots "will shine for a 100 miles" etc
 
Matt T said:
Ive got a deal extreme one, was £30 or so, green 100mw iirc. Apparantly it can pop balloons and cut waste bags but im yet to try.

Oh and a word of warning, these things will zap camera sensors (and your eyes) in a second, so be careful with it!

EDIT: Heres the one...
http://www.dealextreme.com/details.dx/sku.13446
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Jesus that lit a match :eek: wouldn't know what to do with a laser that powerful!
 
pacef8 said:
I,m not sure on the deal extreme and getting past the greys in the big house !! on import
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Wikipedia states these is no UK law on laser pens for private use, dont know how true that is.

And also....
Even a 1 mW laser beam can potentially produce permanent damage to the CCD or silicon sensor array inside a video or still digital camera.
If the camera is focused at infinity, a collimated laser beam will be focused to a tiny spot on the image sensor. Whether damage will occur depends on many factors including the type of image sensor, quality and focus of the optics, and how long the beam is held in one place. A 1 mW beam (much less than what some laser pointers produce) is roughly equivalent to the brightness of the noonday Sun at the equator on a clear day and when focused to a 10 um spot (the approximate size of one pixel on a typical video camera) it becomes 10,000 times more intense! Needless to say, pointing a camera at the Sun is generally not recommended.
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search the web for laser pointers, particularly astronomy shops where they're used for aligning telescopes, an astronomy shop will advise on safety & suitability, just be aware I think it was in Manchester this week, the court sentenced an individual to 3 or 4 months prison sentence for using the pointer incorrectly.
 
pacef8 said:
yes ebay does sell them but they sell the crap ones that do not show the beam.
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No laser will 'show' its beam, as it highly directional light. As long as there is no dust/fog or other particles in its path, the beam won't be visible.
 
SuperCNJ said:
Not doubting you, but does it really mess up your camera sensor?
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Yes it does, lasers can burn coatings on lenses too :eek:

anyways this is the kind of effect you get with a green laser going through quartz crystal







:)
 
I have a few laser pens an old red one I bought ages ago, its a PITA as it uses button cells. I then bought a green one from deal extreme 30mW and I have a blue/purple one 100mW I'm very sceptical about the power ratings but they do what they say on the tin and at the prices who cares they are dirt cheap and I have had no problems with customs DX lable them as light pens.
 
tdcist said:
If you want a laser pen.... look here lol... none of this 100mw stuff... these boys just made a 1W portable laser!!

Daily Tech review - Wicked Lasers Spyder III

Wicked Lasers - Spyder III
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Just read the review, blimey surely a class 4 1W can't be allowed outside of lab conditions :eek:

As far as I know the legal maximum that can be sold to the public for laser pens in this country is class 2 at 1mW of power :)

class 3a and 3b for disco light shows

class 4 and over for medical/lab use and military applications

(quote me if I'm wrong)

:)
 
Rob 80386 said:
Just read the review, blimey surely a class 4 1W can't be allowed outside of lab conditions :eek:

As far as I know the legal maximum that can be sold to the public for laser pens in this country is class 2 at 1mW of power :)

class 3a and 3b for disco light shows

class 4 and over for medical/lab use and military applications

(quote me if I'm wrong)

:)
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I think you are wrong ... although I do recall that such legislation was discussed. For definitive information on Laser Pointers see this link and on lasers in general (with links to more info) see here.
 
tdcist said:
If you want a laser pen ... Wicked Lasers - Spyder III
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I saw this thing in a Metro article. The website specifies it as a 445 nm laser and safety goggles are included with each purchase ("LaserShades included"). But, clicking on their link for "Laser Accessories - Goggles" only brings up protection for red (650 nm) and green (532 nm) lasers ... hmm!

For anyone thinking of buying one, this is a nasty beast. As it's a Class 4 laser it poses many hazards; apart from the obvious (direct damage to eyes and sensors) the reflected beam may also be harmful, there is a risk of it setting things alight, diffuse reflections may pose a risk and even a blue light hazard. Do you really need one ... or do you just want one ... is it worth the risk? How valuable is your eyesight?
 
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