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

Hello from Atlanta

rjcuomo1

New member
Joined
Jul 5, 2022
Messages
4
Points
1
Good evening,

My name is Rick and I'm from Atlanta, GA. I have limited use in lasers (some engraving and basic pointers) and I need a little help and guidance for use in a cosplay prop. I'm looking for the best balance between visibility and safety as no one would be wearing PPE, so something low powered. I'm looking to use 2 blue or purple lasers in a prop. The place it would be use would be well lit, indoor setting. A nm recommendation would be helpful as well considering the attachment.

An example I was looking at is something similar to the 304 laser pointer Sanwu with a pattern cap in place. (I can't post links to it)

But isn't 100mW enough to hurt eyes? Would running it through a pattern cap "knock down" ( for a lack of a better description) the power as it would defuse through it?

This baby is the prop I want to build:
 

Attachments

  • ExowbzuWEAE0rN8.jpeg
    ExowbzuWEAE0rN8.jpeg
    45.7 KB · Views: 12
Last edited:





Joined
Sep 20, 2013
Messages
17,253
Points
113
Welcome to the LPF. In a well lit environment you won't see the beam of a 5 mW laser of any wavelength. It would be best if you could have your beams out of the way of anyone so could could use higher power lasers. Greens are the most visible mW for mW. A 1 watt 520nm would make the beam visible even in well lit conditions. Good luck.
 
Joined
Jul 10, 2015
Messages
9,799
Points
113
Good evening,

My name is Rick and I'm from Atlanta, GA. I have limited use in lasers (some engraving and basic pointers) and I need a little help and guidance for use in a cosplay prop. I'm looking for the best balance between visibility and safety as no one would be wearing PPE, so something low powered. I'm looking to use 2 blue or purple lasers in a prop. The place it would be use would be well lit, indoor setting. A nm recommendation would be helpful as well considering the attachment.

An example I was looking at is something similar to the 304 laser pointer Sanwu with a pattern cap in place. (I can't post links to it)

But isn't 100mW enough to hurt eyes? Would running it through a pattern cap "knock down" ( for a lack of a better description) the power as it would defuse through it?

This baby is the prop I want to build:

Any laser over 5mw can cause serious eye damage.

Also I find your image of a baby shooting laser beams from it's eyes quite dubious......however if you're actually thinking of building something like this, all I can say is NO! ...........Actually HELL NO! ............Lasers into and/or out of eyes is a big NO!
 

rjcuomo1

New member
Joined
Jul 5, 2022
Messages
4
Points
1
Welcome to the LPF. In a well lit environment you won't see the beam of a 5 mW laser of any wavelength. It would be best if you could have your beams out of the way of anyone so could could use higher power lasers. Greens are the most visible mW for mW. A 1 watt 520nm would make the beam visible even in well lit conditions. Good luck.
I'm not trying to have the laser beams themselves being visible. I have regular blue LEDs to make that part of the effect. I'm trying to get the laser to make the effect like one of those christmas laser projectors (see attachment) have and the dots/stars/patterns be visible but don't want to be overpowered and dangerous. I did some reading on other sites saying that when you put higher power beams through those pattern caps, the beams when broken up, end up under 5mW.

Hope that clears up what I'm trying to accomplish
 

Attachments

  • Red-Green-Laser-Christmas-Light-Projector-9849B.jpg
    Red-Green-Laser-Christmas-Light-Projector-9849B.jpg
    294.9 KB · Views: 4
Joined
Jul 10, 2015
Messages
9,799
Points
113
The spinning diffraction gratings will produce many beams, however the more centered beams are often stronger than the rest, I can't guarantee you what will or won't be safe, maybe someone else can give you a basic formula, but any laser device you will be using around people who are not wearing the proper laser safety glasses is your responsibility and your responsibility alone to insure the safety of and know that it's not going to cause any harm or get you sued.

Also you should know the're laws regarding the display of a laser device in public, add to that the distraction hazards.

During the holidays I often catch one of those red/green Christmas lasers driving by someones house that's using the spinning diffraction gratings and when it hits my eye it's very distracting, someone could wreck a car or hurt someone.....really any device that shines laser beams into a wide area needs to be carefully thought out and tested.
 

Ears and Eggs

0
Staff member
LPF Site Supporter
Joined
Oct 1, 2007
Messages
2,858
Points
113
During the holidays I often catch one of those red/green Christmas lasers driving by someones house that's using the spinning diffraction gratings and when it hits my eye it's very distracting, someone could wreck a car or hurt someone.....really any device that shines laser beams into a wide area needs to be carefully thought out and tested.

Not a fan of those laser Christmas displays. Have also got hit in the eye with those a few times. One idiot near my work didn't follow the instruction and had it aiming right into the street and not against their house. A few of the sub beams got me in the eye.


I would definitely recommend starting with a laser under 5mW even if you are going to put it through a diffraction grating as making sure each sub beam is under 5mW is not going to be easy as I don't think it's a linear drop off from the center.
 

rjcuomo1

New member
Joined
Jul 5, 2022
Messages
4
Points
1
You guys think it may be worth it to buy a power meter and to some testing then?
 
Joined
Jul 10, 2015
Messages
9,799
Points
113
These are reasonably affordable and accurate for general testing.


 
Joined
Sep 20, 2013
Messages
17,253
Points
113
Three lasers or power meters?]
Actually it was four, but my Laserbee died on me. I got the 3.7 watt Radiant after the Laserbee, then the Scientech, then the Hyperion as it can measure up to 20 watts.
 

Gruvytune

New member
Joined
Feb 15, 2022
Messages
9
Points
3
Hey everyone.
Anybody have one or know about this meter? For the price?!
 

Attachments

  • 8BF593F9-22F6-4298-934F-D913F70B3CC8.png
    8BF593F9-22F6-4298-934F-D913F70B3CC8.png
    930.7 KB · Views: 2
Joined
Sep 20, 2013
Messages
17,253
Points
113
I believe Jerry, Lasersbee, may have taken one of these apart and they don't have enough parts to make them accurate at all. You really do get what you pay for.
 




Top