5mW* 445nm pointer from laserlands

[NinjaPetey]

Ok. Im still new to all of this... I know green appears to be the brightest to the human eye, but I suppose I'm looking for something around the brightness of a 532nm at 5mw, or slightly dimmer, but not much.

 

[midias]

Beam: (458nm 1mw) vs. (564nm 1mw)

Here you go

 

[Ablaze]

Contrary to what that calculator says, I have found 20mw of 450nm to be about equal to 5mw of 532nm.

 

[Ash]

I'd say that's probably right.
I estimate that the dot from a 30mW 445nm is about the same perceived brightness as a true 5mW 532nm.
I gave a low-powered one to my brother who uses it for lectures. It's ~30mW (pulsed).

 

[NinjaPetey]

Beam: (458nm 1mw) vs. (564nm 1mw)

Here you go

Neat tool, thanks for this.... so I guess the brightness I want is actually closer to 50mw for the 445nm wavelength... Is this safe to use without goggles? Or, I guess now that I'd have more though about it, I suppose what I really want is the highest, but safest power without needing goggles for the blue light.

EDIT: posted this before I read Ablaze's or Ash's post... so I'm looking for something close to around 20-30mw... but again, I'd like the highest power but still safe without requiring goggles. Thanks for all the quick replies

 

[Ablaze]

In general, you should use glasses for anything over 40mw. A 50mw will kind of hurt your eyes to look at. At that power you still have to be very careful not to shine the laser directly into anyone's eye.

 

[NinjaPetey]

I'm going to continue my posts on this over at my WTB thread so I'm not posting the same thing in multiple places. Thanks for all the info here

 

[bitmerge6502]

yep, just what i would've guessed. a 450@80mw is 68% as bright as 532@5mw according to the calculator. my 1W is just slightly brighter beam then my 532@5mw even though the dot is much brighter (well, not exactly brighter, but scatters more light)

 

[Super Critical]

O-Like and Lazerlands I think have this same pointer. It is nice and the output is much more stable than most 532nm pointers. It is a little to bright to look at the spot indoors unless you have a big hallway. I had to squint away from it to take a picture.

 

[The_LED_Museum]

Sorry about the necropost here, but I said I'd purchase one of these bad boys around this time of the year and I did...it got here just over an hour ago.

Here are some preliminary data from mine:

Power output of mine measured at a whopping 167mW.

Spectrographic analysis of this laser.

Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 445nm and 455nm to pinpoint wavelength, which is 450.421nm.
This is well within the range of wavelengths for this diode (typically +-10nm if I remember correctly).

So, being advertised as "<5mW" may lead some people to believe that it is safe to use as a cat toy, but the ***MEASURED*** power output of 167mW clearly goes well beyond what would be safe to use as a cat toy. :gun:

I'll be posting a full review of this laser here within the next several days.

Edit 06-22-12: I have posted my full review on this BBS RIGHT HERE