Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Silly newb question about shining lasers into crystal cubes

Lasing Jake Moon

Lasing Jake Moon

0
Joined
Jun 7, 2017
Messages
44
Points
0
paul1598419 said:
Since the last time I posted here I looked into these laser etched glass cubes. They are quite common and not particularly high in price. So, I guess my point is, there are many people/companies doing this kind of work. I doubt you could cause damage to one with any CW handheld laser of any power currently available. Reflections would be a problem, however, and you would need to be aware of that. If you don't know for sure, I'd try a lower power laser to begin with.
Click to expand...


I'll try first with that little light saber pointer thats on it way to me. Very low power. It says 0.04 - 0.39mw. But first to troll some cats and foxes with it. :D (not in their eyes of course)
 





diachi

diachi

0
Joined
Feb 22, 2008
Messages
9,700
Points
113
Alaskan got it right, Q-switched Nd:YAG for etching. XY Galvo and adjustable focus for positioning the focal point in order to etch the glass at the right spot.

A CW Diode/DPSS portable isn't going to damage it, although as always, be careful with reflections. Not just for your eyes, but intense back reflections can and will kill diode lasers too.
 
paul1598419

paul1598419

0
Joined
Sep 20, 2013
Messages
17,421
Points
113
Lasing Jake Moon said:
I'll try first with that little light saber pointer thats on it way to me. Very low power. It says 0.04 - 0.39mw. But first to troll some cats and foxes with it. :D (not in their eyes of course)
Click to expand...

I think you meant 0.04 watts to 0.39 watts, as what you said would not be more than a fraction of 1000th of a watt. :)
 
Last edited:
diachi

diachi

0
Joined
Feb 22, 2008
Messages
9,700
Points
113
Lasing Jake Moon said:
Not sure. This thing takes 3 AG5 batteries. Tiny watch batteries so probably not even 1mw. It may not even be a real laser. Heres a link. Star Wars Darth Vader Lightsaber Laser Pointer | ThinkGeek

Actually says Class 1 laser.:undecided:
Click to expand...


Yup, it is actually 0.04-0.39mW - little pricey for <0.5mW of 650nm... But I guess it's about the novelty of the light sabre host, eh?

Won't be particularly visible in any sort of well lit environment and poses practically no eye hazard. You'd need to actively stare into the aperture with the laser on for an extended period of time.
 
Last edited:
paul1598419

paul1598419

0
Joined
Sep 20, 2013
Messages
17,421
Points
113
That is pricey as I have one that take three button batteries that put out about 5 mW. I wonder how accurate that less than 0.5 mW rating is. They sure have the wavelength out to between 640nm and 680nm.
 
Last edited:
Lasing Jake Moon

Lasing Jake Moon

0
Joined
Jun 7, 2017
Messages
44
Points
0
paul1598419 said:
That is pricey as I have one that take three button batteries that put out about 5 mW.
Click to expand...

Lasing Jake Moon said:
Not sure. This thing takes 3 AG5 batteries. Tiny watch batteries so probably not even 1mw. It may not even be a real laser. Heres a link. Star Wars Darth Vader Lightsaber Laser Pointer | ThinkGeek

Actually says Class 1 laser.:undecided:
Click to expand...

diachi said:
Yup, it is actually 0.04-0.39mW - little pricey for <0.5mW of 650nm... But I guess it's about the novelty of the light sabre host, eh?

Won't be particularly visible in any sort of well lit environment and poses practically no eye hazard. You'd need to actively stare into the aperture with the laser on for an extended period of time.
Click to expand...

Novelty factor always bumps price up plus its made by Disney so hopefully will be half decent. It was a little cheaper on Ebay where I bough them. Two of them, one for sisters boyfriend as he has full size replica Light Saber. So we halved the postage too otherwise postage would have cost nearly same price as one. Im glad its very low power and safe. Bought and extra 20 batteries for us for a couple of quid too.

:)
 
Lasing Jake Moon

Lasing Jake Moon

0
Joined
Jun 7, 2017
Messages
44
Points
0
paul1598419 said:
That is pricey as I have one that take three button batteries that put out about 5 mW. I wonder how accurate that less than 0.5 mW rating is. They sure have the wavelength out to between 640nm and 680nm.
Click to expand...


As I dont know what im talking about would love to see someone review it. That particular link comments section said they then lowered the price 50% but seems to be back up now. You can get on Ebay still and guessing the postage will be much less as they are all sold in the US. Ones I bought came from Sun City Arizona. Im expecting them tomorrow but other than photos cant offer any technical info.
 
paul1598419

paul1598419

0
Joined
Sep 20, 2013
Messages
17,421
Points
113
My best guess is it is ~5 mW 660nm red laser. That is what I got for about $2.00 in a store right here in Tacoma some 6 years ago.
 
Lasing Jake Moon

Lasing Jake Moon

0
Joined
Jun 7, 2017
Messages
44
Points
0
paul1598419 said:
My best guess is it is ~5 mW 660nm red laser. That is what I got for about $2.00 in a store right here in Tacoma some 6 years ago.
Click to expand...

Do you think its possibly over the spec. Any way to get rough idea without equipment in say comparing 0.5mW to 5mW ?
 
paul1598419

paul1598419

0
Joined
Sep 20, 2013
Messages
17,421
Points
113
I have a 0.5 mW He-Ne laser which is at 6328 Angstroms or 632.8nm. Because it is a shorter wavelength than a 660nm it looks about the same brightness as a 5 mW 660nm. I could probably tell the difference by looking at it, but I doubt you could. Without a way to measure it, there really is no way to know for sure.
 
You must log in or register to reply here.




Top