My laserpointer doesn't make a DOT, but a strange wave, who can help me?

[boywithlaser]

Can i buy it somewhere on ebay ( china ) or something like that? i saw this one 10pcs 635nm-680nmm Coated Red Laser 2 elements Focus Lens/M905x8mm Metal Frame | eBay

 

[Laik]

Yeah those would work, but you get ten of them remember.

 

[boywithlaser]

I have in total four lasers, that make this sh*tty strange point, so i need to change them all....

 

[Laik]

all of your lasers make this weird wave/dot thing?

 

[boywithlaser]

Yes. i have buyed a kind of module, two modules. One makes nice dots the other makes 4x this strange thing. ( one module have 4 lasers on top ) so i have to change them all!

 

[Laik]

Well that sucks, i hope they get there soon :beer:

 

[boywithlaser]

Hi i wanna order some lenses..
But what is the difference between a acryllic lens like this one:

10 Pcs 640nm-680nmm Red Laser Collimation Lens/M905x8 Frame/Coated Acrylic Lens | eBay

And this other lens:

10pcs 635nm-680nmm Coated Red Laser 2 elements Focus Lens/M905x8mm Metal Frame | eBay

Except the accrylic is cheaper i still don't have the idea of the difference between... So what do you prefer guys?
Do i get with bot lenses a nice dot?

 

[Laik]

Try using the search bar and come back if you can't find anything

 

[boywithlaser]

Try using the search bar and come back if you can't find anything

I don't get it ... :wtf:

 

[Laik]

Search for the difference between acrylic and glass lenses, there is a thread that will help you. We can't spoon feed you

 

[boywithlaser]

Search for the difference between acrylic and glass lenses, there is a thread that will help you. We can't spoon feed you

Hmm.. The only difference i can find about it is that a acrylic could melt because it is of plastic?? Is this the only difference?

Wich do you prefer for a 640nm red laser?

 

[Laik]

Yeah, and glass typically has an AR coating which is what makes the difference. Its the outer plastic part that melts, not the actual lens. My choice of lens would be a G-1 but they are expensive, i prefer an AR coated lens over a regular lens.

 

[boywithlaser]

Okay that's clear and if you have to choose one of this two that i have showed in the link?
Wich would you choose than?

 

[Laik]

How powerful are the other lasers you are replacing the lenses with? If it is 200mW and under you should be fine with using the acrylic lenses. If you don't mind spending the extra money i would go for the glass lens, they are only have 2 elements as well. Hope we helped!

 

[boywithlaser]

Okay thanks it is <200mW. And i don't want to spend to much... So Acrylic is a option for me. Thank you! I will show the results if it has helped after a few days/weeks.

 

[Laik]

No problem and i hope you get your new lenses soon :beer: