How can I make my laser beam more sharp ?

[Dildror]

Hello !

Just got my O-Like 405nm laser, and it's a little disappointing. I have iShow, and while displaying really basic shapes, I can tell that the laser beam has "width" - which means that the beam isn't sharp enough.
I also purchased from them a guarding glasses, and when I look at the beam with it it seems really nice and sharp.

Is it possible to make my laser beam more focused ?

Thank you .

 

[ElektroFreak]

If the beam looks sharp through safety glasses that's all that matters when dealing with blu-ray lasers. The short violet wavelength makes the dot/beam difficult for your eyes to focus on, so it will usually appear "fuzzy" unless you look through goggles.

 

[ELEktron]

What do you mean by "sharp"?
Beam thickness or divergence?

 

[Dildror]

ElektroFreak, I'm new to lasers so what you just said sounds logical ...
ELEktron, I meant for divergence, as the laser beam does look fuzzy list ElectroFream said ..

I had no idea this was the case.
What about blue lasers such as 445nm or 473nm ? The human eye has trouble focusing on that color in the dark as well ?

 

[ElektroFreak]

ElektroFreak, I'm new to lasers so what you just said sounds logical ...
ELEktron, I meant for divergence, as the laser beam does look fuzzy list ElectroFream said ..

I had no idea this was the case.
What about blue lasers such as 445nm or 473nm ? The human eye has trouble focusing on that color in the dark as well ?

With 445nm the effect is still noticeable, but it's not as pronounced as it it is with 405nm.. 473nm is almost teal/turquoise, so the blurred effect is all but nonexistent.

The same effect is noticeable when looking at a blacklight from a distance.. it's nearly impossible to focus your eyes on the source.

 

[chipdouglas]

good explanation "elektroFREAM"


michael.

 

[ElektroFreak]

lol... well I'll cut him some slack.. I'll bet his Czech is way better than mine ..