Aixiz New 405-450 Lenses

[LarryDFW]

tocket;

Nice work on the divergence measurements.

I do think the raw diode has more power than you measured.

The ~40° wide fast axis is difficult to capture on most power meters.

I have seen about 13 to 14% increase with my Hi-Power lens over the 405/445 Aixiz lens.

And, of course, there is still a few % of loss with the AR aspheric.

LarryDFW

[dave]

Yes, but the Rochester lens has a larger divergence right?

tocket;

Nice work on the divergence measurements.

I do think the raw diode has more power than you measured.

The ~40° wide fast axis is difficult to capture on most power meters.

I have seen about 13 to 14% increase with my Hi-Power lens over the 405/445 Aixiz lens.

And, of course, there is still a few % of loss with the AR aspheric.

LarryDFW

[polishedball]

So which is the full thread and which is the half? I think I have a couple of the original half threads coated for 405 kicking around somewhere.

Cheers
Rich

Half thread on the left. They are sending 2 additional lens to me to check. Should have them on tuesday.

[mccarrot]

Got my new aixiz lenses yesterday and played around some with them today. I first attempted to measure the loss through the lens. The setup used is seen here (power meter not shown):

At 1 A I get 0.8 W from the uncollimated diode. With the new aixiz lens the output dropped to 0.7 W. Measuring the raw diode power is tricky because of the very divergent beam though. I used an Ophir 3A-P-FS sensor that I think caught most of the light. However, since I can't be sure about the raw diode power I will simply state the loss in the lens as >13%.

The beam is 2 x 5 mm at the aperture and diverges to 36 x 5 mm at 19 m giving a slow axis divergence of 1.8 mrad and a fast axis divergence of < 0.05 mrad.

Your diode must have dropped in power due to the heat. with proper tec cooling this diode will put out almost 1W @ 1A

My rough estimation of the FL of this lens would be arround 8

with correction optics your beam will be 5x5mm with this lens, 500mw-2W green lasers normally have beam size of 2-3mm, so you will end up with a white beam in the middle with blue arround it.

with Kvant or my lenses (FL4,6) you will end up with a 3-4mm beam diameter and much much less loss. this divergence will be higher but most of us use chinese lasers with a divergence higher than 1mRad so why bother to get this blue lower than 1mRad.

[dave]

but most of us use chinese lasers with a divergence higher than 1mRad so why bother to get this blue lower than 1mRad.

Exactly.

Chinese 2w greens are typically 2mrad, and higher divergence with higher powers..

[Zoof]

Your diode must have dropped in power due to the heat. with proper tec cooling this diode will put out almost 1W @ 1A

My rough estimation of the FL of this lens would be arround 8

with correction optics your beam will be 5x5mm with this lens, 500mw-2W green lasers normally have beam size of 2-3mm, so you will end up with a white beam in the middle with blue arround it.

with Kvant or my lenses (FL4,6) you will end up with a 3-4mm beam diameter and much much less loss. this divergence will be higher but most of us use chinese lasers with a divergence higher than 1mRad so why bother to get this blue lower than 1mRad.

Last night this is pretty much what I saw.
A red AR coated, fully threaded Aixiz lens and a set of prisms gave an output aperture of 5x5mm, and at 10m around 14x14mm (see pic). Divergence around 1mrad.
The prisms are these: http://www.surplusshed.com/pages/item/pm1081.html
Losses due to these prisms are around 10%, no clue what gets lost in the Aixiz lens.
At 1A the output after optics is 900 mW measured with die4thing.

If there is a 9mm 0.5 threaded lens out there with FL4.6 I'll like to give that a try with this setup.

[mccarrot]

If there is a 9mm 0.5 threaded lens out there with FL4.6 I'll like to give that a try with this setup.

ahum:http://store.laserextreme.nl/catalog...products_id/79

But I have already done the test with this lens and you can fond them on this forum

[Zoof]

ahum:http://store.laserextreme.nl/catalog...products_id/79

But I have already done the test with this lens and you can fond them on this forum

Ah, for some reason I was under the impression that the thread on your lenses was incompatible with the aixiz lenzes...

[LarryDFW]

Zoof;

It looks like a pretty symmetric beam pattern.

The Aixiz diode module requires a threaded 9mm x 0.5mm lens housing.

The one referenced above is 11mm unthreaded.

There are several lenses with different FL available.

The one I use has a back FL of 2.39mm, NA of 0.6, and is AR coated 400-600nm.

LarryDFW

[mccarrot]

No, my lens is a 9mm x 0,5 lens inside a 11mm brass collimator housing where you can put the diode in the back.

with this complete collimator assembly way you only need to drill a 11 hole in a mount to make it fit, and is easy to polarize because you rotate the complete collimator + diode.

With a separate lens you must make a threaded mount, own made tread is most of the time not 100% perfect so your lens can wobble in the mount.

With my lens the 9mm tread is a perfect fit with the 9mm tread in the 11mm collimator housing so no wobbling lens.

maybe his picture makes it more clear: