I suspect she doesn't know how to set up ebay for regular mail and express choices, she probably messed that up. I asked her to let me pay express DHL, then her listing changed to show only express mail.
I write she because the emails are signed Sabrina.
Yes I agree and that's information we don't have yet and no issue once in hand, no issue what so ever once in hand.
My dilemma as the price plus shipping is now 150.00 range each diode is which version of FAC corrected diodes will be better at maintaining beam shape over distance, lenses can be adjusted, but how well the FAC has adjusted the divergence of the fast axis is my question.....yes I know we will have to wait and see.
I am interested to know how well these FAC corrected nubm08 diodes compare to a 6X c-lens corrected nubm44 which is a sister diode only wavelength is 455 vs. 445 however raw divergence and output is comparable, and I don't expect they could be any better but they would be more convenient for PBS combining and knife edging, the line output FAC corrected for knife edging and likely the square beam output FAC corrected diodes for PBS combining.........but maybe not, not if one holds it's beam shape better over distance than the other, I am not building a CNC for point blank only use and I fear the square beam FAC corrected diode may not hold it's shape over distance as well as the line output unit might.....again I know we will see in time.
I also have NDB7A75 c-lens corrected beams that are very good and do 5w which I seriously doubt a single lens FAC could match, I would be happily surprised if they are as good or dare I dream better, but given the physics I imagine they are not, however if pretty good then let the beam combining begin.
My issue is how many do I buy now not knowing how long the supply may last and which FAC corrected version will be better at holding it's corrected beam shape, adjusting optics once in hand is not an issue..........I don't expect a guaranteed answer, just looking for insight......your see what ya got when in hand is insight of sorts but I am looking for a bit more cerebral information.
Not much. I wonder how long the fiber might be?Hey steve001 what do you know about FAC FIBER as it's used in the sales description of these FAC corrected diodes ?
Is it saying these FAC lenses are designed for fiber coupling applications such as CNC use ?
I think we are hoping for some magic here and CDBEAM777 called it, they likely did not modify these so we can burn at distance or paint a dot on the moon, but likely for home CNC use......however I do remain hopeful that we can repurpose some of these for " beautiful beaming " applications.
A NUBM07 with a window can and backfill gas would be nice.
The sharp is on the right?
How does the divergence and spot size compare to the 1w Nichia?
Hmmmm...I think the FAC corrected Sharp is on the left....because....525nm would have more a yellow tint...and the left unit looks to have a yellow tint....IMNSHO...also...the beam on the left appears to have a tighter geometry...at least at about 3M !!
Trinh...Stop Dick'en around ( HAHAHAHA )..It is now after Sunset in Vietnam....Get those beams out the window !!! I wanna see what the geometry looks like at 50M !!!!!!!!!!!!!!!!!!!!!!! Thanx....CDBeam
Im pretty sure you are correct that its not FACedMy guess is that they're maybe both the Sharp diodes (that aren't FAC corrected, pretty sure the Sharp diodes aren't offered in FAC) with different wavelengths between samples? That or just the one of the right is the Sharp.. either way I'm pretty sure the Sharp isn't a FAC modified diode...
Great discussions to all of you !!! This is sure changing fast...prices going up !! $45 for shipping a diode ??? Come on !!!! Well....basically...we are at their discretion...PERIOD !! To Bad...So Sad !! OK...I can see FAC for CNC at the Blue line...Why Red and Green ????
The line output FAC corrected diode may be better at holding it's beam shape over distance as it's dimensionally reflective of the P/N junction and I don't see the square output FAC corrected diode as having enough physical space to match axis length and correct divergence is such a short distance given the line shape of the P/N junction ect.....but I hope it has done the magic that we desire and I am very curious about the shape of the FAC if it has.
Look at the FA raw divergence on their spec sheets for "linear" and "square" of the same type diode. This should "clue you in" to whats happening.I'm still really confused about the "line" FAC corrected diodes... for three reasons.
1. If the output geometry is a line, whether it's a longer or shorter line than the uncorrected beam.. it's still a line, implying that the fast axis isn't being adjusted in this case, but rather the slow axis is being adjusted.. a "SAC"?
2. Is the slow axis being made longer, like a line generator (exactly not what we want).. or shorter?
3. If shorter, how does that effect the beam in the far field? My guess is, not much since the fast axis should diverge at the same rate as an uncorrected beam, making the spot width unchanged but the spot "thickness" slightly less (remember the fast/slow axis lengths flip just a few feet away from the diode). Maybe this arrangement is useful only for CNC as the beam would be tighter a couple inches away from the diode and have higher energy density?
Actually that would imply that the "slow axis correction" would be correcting by reducing the slow axis rather than expanding.. which just isn't how that works.
So just.. what? Huh? I mean, ? Shrug...
Yeah, I see that for the 525nm diode, the parallel/perpendicular divergence is 11/11 for the square and 11/1 for the line. It just doesn't make sense that they were able to correct to 1mrad, usually correction is done by expansion and I don't know how expansion could result in both a line AND better divergence. I guess I'll just have to wait until someone posts pictures of the behaviour of the two types of FAC side by side.Look at the FA raw divergence on their spec sheets for "linear" and "square" of the same type diode. This should "clue you in" to whats happening.
Its 1 deg not 1mRad. 1 deg = about 17mRad. Think about this. A standard 8mm EFL aspherical lens produces aprox .2mRad on the FA, A 4mm EFL (G2) produces aprox .4mRad, A 2mm EFL produces a aprox .8mRad. So just extrapolate backwards to 17mRad. Very short EFL for collimation. Most FACs i have seen are not set for infinity focus so the actual EFL is probably larger than would seem. Maybe .5mm or so.Yeah, I see that for the 525nm diode, the parallel/perpendicular divergence is 11/11 for the square and 11/1 for the line. It just doesn't make sense that they were able to correct to 1mrad, usually correction is done by expansion and I don't know how expansion could result in both a line AND better divergence. I guess I'll just have to wait until someone posts pictures of the behaviour of the two types of FAC side by side.