640nm lasers on ebay

[badger1666]

what does anyone think of these dodgy or what ???
seem very cheap for 640nm
http://cgi.ebay.co.uk/ws/eBayISAPI.d...n%3D2%26ps%3D5

[thesk8nmidget]

i dono but it seems kinda fishy

[Dr Laser]

Istambul Turkey?...

What about Abuja Nigeria?

[badger1666]

i email the guy and he replyed 2 minutes later with this

spectral width is 635 - 645 nm center wawelength is 640 nm. we have datasheet in printed format. we are preparing datasheet in pdf format as soon as possible.

still dont know what to think

[drlava]

that is the same current range as a long die open can diode can take.. and this unit is mounted in a drilled-out resistor heatsink. My guess.. 655-660nm, not 640.

[buffo]

My thoughts exactly. I'm guessing that they're fudging on the wavelength.

Still, at ~ $80, it's not a bad deal for a 300 mw laser, even if it is 650 - 660 nm.

Adam

[rfourt]

would like to see the beamspecs of this couse the price is not so bad.

but this picture makes me worry alitle bit.

Wery wide in the start and then goes thin about 10cm and then starts wideing.

Ive done something similar to this with an normal magnifying glass and it looks excactly the same although 1meter away the dot is big as a fotball (soccer ball)

[Banthai]

310mW ...... but for how many seconds ?


Karl

[allthatwhichis]

310mW ...... but for how many seconds ?


Karl

Exactly... ....................

[Lasershow]

The guarantee condition must be until damaging… junk