-6mm FL Coated Lenses

**Jem** · 08-31-2010, 06:47

Hi all

Anyone know of anywhere I could buy a couple of -6mm FL lenses?

I need these as a means of rapidly expanding a laser beam over a very short distance. Diameter of probably no less than 5mm as below that they become difficult to mount.

Either plano concave or bi-concave form would be suitable. Preferably reflection free coated for visible wavelengths as i'll be using them with 532nm and 632.8nm lasers.

Edmund Optics have them but I was hoping for a cheaper source if possible.

Many thanks

Jem

**andy_con** · 08-31-2010, 07:39

you could try roithner

**edison** · 08-31-2010, 07:46

yep these are the ones from roitner:

GS-7021-2C, 5 x 2.3 mm, f = 6 mm, ARC, laser diode collimator

**krazer** · 08-31-2010, 08:10

He is looking for a -6mm concave lens, that is a +6mm convex lens.

Have you tried surplusshed yet?

**edison** · 08-31-2010, 08:22

sorry i missed that

**Jem** · 08-31-2010, 09:28

Thanks guys

Krazer, thanks. I couldn't remember the name of Surplusshed. I'll take a look.

Cheers

Jem

**LesioQ** · 08-31-2010, 10:14

Originally Posted by krazer

He is looking for a -6mm concave lens, that is a +6mm convex lens.

For diverging purposes I guess he'd also go with positive one.
These can be found with shorter f.l., like 4.6mm from Thorlabs.

Piotr.K

**Jem** · 08-31-2010, 12:22

Sorted now, thanks folks

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-6mm FL Coated Lenses

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