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I can't detect a secondary beam in that photograph either. :/

I use an older model Ocean Optics USB2000 (which I'm fortunate enough to still have the calibration data for) and it still performs quite admirably thankyouverymuch (it is only plugged into my computer during active use; I don't keep it connected continuously for obvious reasons like many people...

You're very welcome kind sir! :D

Added photo of the square artifact next to the main beam (no need to add BTTT to this post) ;)

Re: Review of the Directly-Injected 505nm Bluish-Green Laser Pen Sorry about my extended absence. :( I simply haven't had any lasers to evaluate since the Skytech 520nm jobbie from last year. Thank you for your compliments regarding my reviewing format and details that I add (I believe that...

488nm is my new favourite wavelength; just yesterday I received a 488nm portable directly-injected diode laser from overseas; I knew from the time that I fired it up that it would spectro somewhere very close to 488nm, and when I did spectro it, I got a wavelength of 488.7nm! Needless to say I'm...

DIRECTLY-INJECTED 488nm GREENISH-BLUE ("CYAN") LASER PEN, retail $66.98 Manufactured by (Unknown) Last updated 09-13-18 This is a greenish-blue-emitting diode laser in a fat pen-style body. But it's not DPSS (Diode-Pumped Solid State) like those now-common green and light blue (473nm)...

I got one of these lasers this afternoon; to the eye it looked identical to the 488nm argon ion laser line. It spectroed at 488.7nm which is damn close indeed! It was advertised as a 1mW unit; however it measured 68mW! :evil: I'm officially a very happy camper!!! :drool:

DIRECTLY-INJECTED 505nm BLUISH-GREEN ("MINT GREEN") LASER PEN, retail $79.00 Manufactured by (Unknown) Last updated 09-09-18 This is a bluish-green-emitting diode laser in a fat pen-style body. But it's not DPSS (Diode-Pumped Solid State) like those now-common green laser pens, pointers...

I purchased a "301" laser quite a number of months ago but it is violet, not DPSS green. I haven't spetroed or LPMed it yet, but it is of decent output power -- when the focus is adjusted so that its beam comes to a point, it will cause smoke to issue from wood and dark plastic. I believe that...

BTTT:: Took a photo that shows the actual beam in daylight.

High Power Rechargeable 405nm "Purple" Laser Pen, retail $10.00 Manufactured by: (Unknown) Last updated 02-15-16 The High Power Rechargeable 405nm "Purple" Laser Pen (hereinafter, just called a "violet portable laser") is a violet-emitting, directly-injected laser. That is, it produces...

BTTT: Shot the obligatory, "match lighting" video.

BTTT: Added a photograph of the beam itself in clear skies.

I honestly have no idea who's diode is in that thing...methinks that I'd better email my contact at Skytech and ask that very question. I did some sleuthing on Google and it indicates that Osram is indeed the manufacturer of the laser diode in the 520nm green laser, and Nichia is the...

I guess this rat forgot to flush itself and ended up paying the ultimate price. :-/

BTTT: Performed a fourth stability analysis cum battery discharge analysis at minimum power output.

Finally, somebody came out with a TRUE sub-5mW blue laser that actually is cat-eye safe!!! :thanks:

BTTT: Added a photograph of a room illuminated solely by this laser directed at the ceiling.

Re: Review of the Skytech 520nm Class IV Green Portable Laser BTTT: Performed a third stability analysis cum battery discharge analysis at minimum power output; also performed multiple spectrographic analyses of the product below lasing threshold.