Spatial filters thread?

[norty303]

Can someone link me up to Eric's/Planters original spatial filter thread please, I cannae find it!

Am i right in thinking its simply a case of adding 'shutters' (razor blades, etc) at the beam waist between the correction optics?

[markmtts]

Hi Adam,

Here's the youtube link

https://www.youtube.com/watch?v=A5sjyEGFOhE

and here on PL which is maybe where it came up originally

http://www.photonlexicon.com/forums/...Spatial-Filter

Cheers,

Mark.

[LaNeK779]

is this it? http://www.photonlexicon.com/forums/...ybe-ALL)-Beams
The youtube link is #40, page 2 https://www.youtube.com/watch?v=_POfjxeAEvU


and here is my own take, for illustration purposes, using a 400um apperture and a 1:1 telescope http://www.photonlexicon.com/forums/...9&d=1342125279 (no beam measurements, I was just trying to take a pretty picture)

[logsquared]

and here is my own take, for illustration purposes, using a 400um apperture and a 1:1 telescope http://www.photonlexicon.com/forums/...9&d=1342125279 (no beam measurements, I was just trying to take a pretty picture)

What flavor bubble gum do you recommend to hold the spatial filter?

[LaNeK779]

Heh!! This is just some sort of sticky putty and it tastes a bit meh... I call it "rapid prototyping holding-together agent" and it allows fine 3 axis adjustments However, repeatability is an issue.

Joking aside, I have found the sweetening additives in chewing gum to cause increased divergence in beam propagation when used to hold spatial filters in place.