Another project red?

[MisterWilling]

Well I paid the same amount for the lenses I bought all ready. I will resell them back and go for the Lens 27 then. Thanks for all the info guys. Sorry if this if off topic.

Yes the aixis glass is a 3 element lens. Thats why it has 20% loss even though its AR coated.

[andy_con]

Andy, would you happen to have one of the lens27 collimators? I'm assuming you have access to the 7020H lens, but if you could compare the two, against the AixiZ lenses, we would all be very greatful. £3 per lens is a great price if the lens truly proves better than the AixiZ glass lens. I believe the AixiZ glass lens is a multi-element assembly.

Thanx;
DDL

i do not have any lens27, but i do have standard aixiz, glass aixiz and 7020h lens.

when i get time ill try get some info for you

[daedal]

i do not have any lens27, but i do have standard aixiz, glass aixiz and 7020h lens.

when i get time ill try get some info for you

Thanx a bunch man

--DDL

[ElektroFreak]

Well I paid the same amount for the lenses I bought all ready. I will resell them back and go for the Lens 27 then. Thanks for all the info guys. Sorry if this if off topic.

Yes the aixis glass is a 3 element lens. Thats why it has 20% loss even though its AR coated.

One thing people fail to give credit to the three-element lens for is the most important feature of such an arrangement: Beam quality in the far field

With diode lasers that use single-element lenses I have found that the beam quality decreases with distance from the laser. About 50m away from a diode laser with a single element lens and the beam is a misshapen splotch rather than a nice elliptical beam. With the Aixiz multi-element lens, I get a nearly perfect circular spot even at great distances away from the laser. IMO, this outweighs the power gains to be found in single-element coated glass lenses.

[andy_con]

One thing people fail to give credit to the three-element lens for is the most important feature of such an arrangement: Beam quality in the far field

With diode lasers that use single-element lenses I have found that the beam quality decreases with distance from the laser. About 50m away from a diode laser with a single element lens and the beam is a misshapen splotch rather than a nice elliptical beam. With the Aixiz multi-element lens, I get a nearly perfect circular spot even at great distances away from the laser. IMO, this outweighs the power gains to be found in single-element coated glass lenses.

maybe so but with the roithner lens you get a smaller beam at apeture and far field.

the standard aixis and glass aixis lens both produce the same size beam.

[badger1666]

i wonder who makes the lens aixiz use, as roithner stock both of them as well ??

[ElektroFreak]

A smaller beam at aperture means greater divergence.. there are ways around that, though. Really, the truth is that if you're doing shows beam quality is nearly irrelevant other than divergence. I'm just a sucker for really clean, high-quality beams..

[badger1666]

@mccarrot
what lens did you use to get .. 4 diodes and have a beam of 2,5 x 2,5mm x 0,7mrad.

thanks

[daedal]

the standard aixis and glass aixis lens both produce the same size beam.

I have seen a major change between the AixiZ acrylic vs the glass lens personally in the overall beam shape, quality, and divergence across the fast axis and slow axis.

--DDL

[andy_con]

I have seen a major change between the AixiZ acrylic vs the glass lens personally in the overall beam shape, quality, and divergence across the fast axis and slow axis.

--DDL

really the glass aixiz i have here are poo