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



Videos you wish to share part two.

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,276
Points
113
That's correct, the wavelength is the theoretical cut off. However it is a based on the wavelength and its M2 factor. You would have to have both a perfect M2 beam, and a very short focal length lens to get anywhere near the spot size equivalent of its wavelength. Also the rayleigh length would be extremely short.

Edit: Off topic. Found this interesting if anyone wants to take a look

 
Last edited:



RedCowboy

Well-known member
Joined
Jul 10, 2015
Messages
10,986
Points
113
Yes, maybe you could get close with a bdr-209 but not so much with our favorite multi modes, although going by the naked eye it looks like you could focus the waist down to seemingly an infinitely small diameter, but in reality it's nowhere near the width of the beams spectral wavelength and infinitely small is only valid as an abstract concept.
SANY4207.JPG
 

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,276
Points
113
A BDR-209 would be a good contender for a laser already in a most of members possession for sure.
A high quality gas laser or dpss would also be good. The best way to get a smaller beam waist is to expand the beam first before focusing.
 

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,276
Points
113
I like those enclosures. I bet just like most Kvant products, they are quite pricey.

Edit: Lol, the one shown is £3231.00 / $4489.84
 

Encap

Well-known member
Joined
May 14, 2011
Messages
6,145
Points
113
On a less serious note:

We live in a monkey see, monkey do world, apparently :

 
Last edited:

gazer101

Well-known member
Joined
Feb 23, 2020
Messages
662
Points
63
I like those enclosures. I bet just like most Kvant products, they are quite pricey.

Edit: Lol, the one shown is £3231.00 / $4489.84
Damn their cheapest laser costs like $1k, and it has a lower output power than my $50 gatling laser. To be fair it has galvos and a microcontroller and stuff, but still seems wayy overpriced:
 

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,276
Points
113
You pay for quality, parts and the brand with them. Kvant are known for high quality laser modules. Their beam specs gives a good hint that they do beam correction to maintain optical quality.
 

ArcticDude

Super Moderator
Staff member
Joined
Jun 22, 2016
Messages
2,688
Points
113
Damn their cheapest laser costs like $1k, and it has a lower output power than my $50 gatling laser. To be fair it has galvos and a microcontroller and stuff, but still seems wayy overpriced:

You pay for quality, parts and the brand with them. Kvant are known for high quality laser modules. Their beam specs gives a good hint that they do beam correction to maintain optical quality.


 




Top