Lens specs.

[Zoof]

Looking at the lens-27 datasheet from Roithner it states:

• very high efficiency
• f = 3.6 mm
• N.A. = 0.45
• 1 glass lens, AR coated
• designed for 633 nm ± 30 nm
• dimension 11.7 x ∅ 9 mm, M 9 x 0.5 mm
• black aluminium
• divergence: 2 mrad


What does N.A. mean?
What does divergence as a lens spec mean?

[Grimm]

Hello Zoof,

NA stand for numerical aperture, but i dont know the divergence spec.
http://en.wikipedia.org/wiki/Numerical_aperture

[werner1619]

a easy eplanation of divergence: The more mrad value, the more the laser beam will spread out/ increase in size from it's emmited divergence.

small divergence value is good, large divergence number is bad.

Bad divergence: a flash lite, beam spreads out very quick
good divergence: a laser.

hope it makes sense
w.

[Zoof]

Thanks Grimm!

About divergence, I know what it is but I just don't see what it means as a lens specification.

[dave]

Looking at the lens-27 datasheet from Roithner it states:

Thats an expensive collimator..

[Zoof]

Yes, it is expensive! I'm trying to figure out what is so special about it.

Does anyone know a good source for collimating optics M9 0.5 pitch?
Glass for >100mW red ARC
And non-coated or 405nm coated for blu ray diodes?

[dave]

I quite like this collimator:

http://www.alltronics.com/cgi-bin/it...ers%2DHK10%2E4

Has a small o ring holding the lens in place, and a cay046 just drops in place of the lens thats already in the collimator..

[edit] Its not a metric thread tho..

[dave]

And a few of them mounted

Just waiting on some mini mirror mounts to be made.. Planning on using 2 of these mounts to combine 6 diodes

[mixedgas]

Looking at the lens-27 datasheet from Roithner it states:

• very high efficiency
• f = 3.6 mm
• N.A. = 0.45
• 1 glass lens, AR coated
• designed for 633 nm ± 30 nm
• dimension 11.7 x ∅ 9 mm, M 9 x 0.5 mm
• black aluminium
• divergence: 2 mrad


What does N.A. mean?
What does divergence as a lens spec mean?

Numerical arpeture is a measure of how well it collects light over a geiven angle.

Steve Roberts

[Jem]

Just waiting on some mini mirror mounts to be made.. Planning on using 2 of these mounts to combine 6 diodes

Dave

Will you be selling any of these mounts/mirrors? I'd like to have a go at combining 4 x MaXYZmodules to get 900mW.

If you have some spare please PM me and let me know how much you want for them.

Cheers

Jem