Aspheric collimators for red and blue laser diodes

[lasertack]

Hi all!

Somebody interested in aspheric collimators mounted in a metal retainer (M9 x 0,5)

Specs:

FL: 4,6mm
NA: 0,53
CA: 4,89mm
CT: 3,1mm
OD: 6mm
AR Coating 300-700nm
Manufacturer: Rochester Precision Optics

The lens is suitable for blue and red diodes.

The price is 25,21€ + shipping (costs depending on your location). EU customers will need to add 19% VAT (for a total of 30€). For VAT registered customers from the EU (except Germany) the VAT will be excluded.


Alex

[-bart-]

I think yours sales might improve if you add some beamshots and/or expected beamspecs of some popular diodes.

[lasertack]

Ok. Will be added by the end of the next week. Just wanted to know whether there is some interest in general or not.

[steve-o]

Yes, I'm sure that there is some interest, it would be good to know some details; e.g. has their performance been evaluated with wide emitter laser diodes, are they new or used (removed from equpment) etc. And perhaps a picture of the actual unit in addition the blueprint drawing that you posted.

[lasertack]

The lenses should arrive by the end of the next week. Then I´ll take some pictures of the tests (power and divergence measurement of this lenses vs. standard o-like lenses) and paste them.

[dave]

Are they the a-671's they look like the 405-g-2's

[lasertack]

Check this LINK
The lens I offer is the A390.

Alex

[lasertack]

The lenses arrived yesterday and I did some tests. Here are the results:

Test parameters:

Laser diode: 1W 445nm from XJ-M140
LD Threshold: 145mA
Current set to: 800mA
Tested lenses: O-Like and aspheric
Power Meter: Thorlabs PM100D with S310C sensor

Results:

POWER

Output power without lens: 1079mW
Output power with the aspheric lens: 1062mW
Output power with the O-Like lens: 803mW

Divergence

Distance: 5m
Beam diameter at aperture with O-Like lens: 4,5 x 2mm
Beam diameter at aperture with aspheric lens: 4 x 1mm
Beam diameter after 5m with O-Like lens: 11 x 3mm
Beam diameter after 5m with aspheric lens: 15 x 2mm
Divergence with O-Like lens: 1,4 x 0,2mrad
Divergence with aspheric lens: 2,2 x 0,4mrad

Beam diameter after 5m with anamorphic prisms and aspheric lens: 10 x 3mm

The used prisms are from a CNI 473nm laser head and are not optimal for 445nm, so the results with 445nm prisms will be better. Unfortunately I do not have 445nm prisms right now.

Next week I´ll get my beam profiler and make some more tests and post them then.

[lasertack]

Nobody interested in this lenses?

[dsli_jon]

Nobody interested in this lenses?

Not to sound 'ungrateful' for your efforts, but... the 'extra' $20.+ / lens, in value (vs the O-likes) is not immediately smacking-me across the face... I'd suspect that any additional 'gains' in the apparent power-transmission efficiency, would be lost in the lower 'visual-density' of the higher-divergence beam...

Now, if it had better T, same divergence, and, it was, say, 3 x 1, at-aperture, then, yeah.. that would yield some power-gains for knifers, and *possibly* be worth more / lens... But, as it stands, we're splitting hairs, here, so... not sure I'm quite 'getting' the value-proposition...

Anyone else?
j