Success on spatial filter build

[kecked]

Success thanks to a very patient man. Planters I can't thank you enough.
p73 into opt cyl set into 50mm lens spatial filter and 100mm objective for 2x telescope. Gave me a 4mm beam on the scanners and about 3mm on the wall 20 feet away (pure guess by eye)
The first set you see is the diode backed right up to the concave element. The next set is the convex cylinder backed up the 50mm lens of the spatial filter. The center is the mask block. The last is the 100mm objective.

im going to make a laser cut template for the optics holders so I can just drop in the holders and have them nearly in place. The cyl end will go to a round insert with a rectangle to hold the cyl lens in place. That way I can rotate the optics to align easy. Drop of glue and a screw...nice beam.

making four of these. One blue, one green two blue. Adding the Reds with pbs and no wave plate since I corrected the beam to square. 2w red, 1w green, 1w blue. Now all these then will go to a triplet spatial so I can trim off any color fringes. Figure to loose 20-50% of the beam but the result will be an ion like 2w projector beam. Can remove the spatial mask when I do beam when I need the power.

last shout to Dtr those mounts are the rail carriers you suggested!

[nano]

can you upload some photos about the near and far field of beam?

[kecked]

can you upload some photos about the near and far field of beam?

see planters movie. I copied him. Ps wood sucks as a stable base!

[nano]

I saw Eric's video, but I wanted to see your result. Your far field is 4mm, and at 8 meter distance it is 3mm? It sounds too good. Maybe you have too much power loss.
Yes I know that wood is wrong to the base, that's why I used the wood as my frame of ESL speakers.
Can you send me a link about your spatial filter lens? Not necessary the achromatic lens, I wanted to use spatial filter for every each colors like Jordi.

[Nii]

Rail carriers? Never heard of those. "Shaft support" sounds like a more common term for these.
They could work very well for me as well, depends on the height the lenses will be in those compared to standard diode mounts which are 15mm to center of diode from base.

[kecked]

I'll get pictures this weekend. Yes I do loose a lot of power but that was on purpose. Trimming the beam for quality not quantity. Figured a new approach. Start with too much power and then trim the beam for perfect overlap like an ion laser. If you do it right your optics train can wander a lot and still make a perfect beam.

I plan to start with 4w and end up with 1-2w. Maybe I'll get more don't know. Saving up to buy 1w green.

http://www.ebay.com/itm/2pcs-SK20-20...oAAOxyY9VRSppZ

[swamidog]

I'll get pictures this weekend. Yes I do loose a lot of power but that was on purpose. Trimming the beam for quality not quantity. Figured a new approach. Start with too much power and then trim the beam for perfect overlap like an ion laser. If you do it right your optics train can wander a lot and still make a perfect beam.

I plan to start with 4w and end up with 1-2w. Maybe I'll get more don't know. Saving up to buy 1w green.

http://www.ebay.com/itm/2pcs-SK20-20...oAAOxyY9VRSppZ

i've been using those little sk12 mounts for years. they're super handy.

[kecked]

Had to add nd filter to knock down the brightness plus flash. the image is still bloated but the result is about 1/8" in nearfield and 1/16-1/32 at about 15 feet away. The weird wings are cuz I knocked the pinhole out of alignment photographing. Yup wood sucks.

I think a high mag cylinder to make the beam more square might be called for.

[catalanjo]

Rail carriers? Never heard of those. "Shaft support" sounds like a more common term for these.
They could work very well for me as well, depends on the height the lenses will be in those compared to standard diode mounts which are 15mm to center of diode from base.

12mm shaft mounts are centred at 23mm above base,have fixing holes at 32mm centres and are 14mm thick !
Cheers
PS Cheap Chinese versions need replacement 4mm allen screws BEFORE you strip the hex heads by tightening on to slightly undersized diode mounts.

[Nii]

12mm shaft mounts are centred at 23mm above base,have fixing holes at 32mm centres and are 14mm thick !
Cheers
PS Cheap Chinese versions need replacement 4mm allen screws BEFORE you strip the hex heads by tightening on to slightly undersized diode mounts.

Sounds a bit high. But if the hole is small enough maybe a bigger hole matching the lens size could be drilled off-center with a drill press?

Yet to decide what size telescopic lens I should get so no idea how big of a hole can be drilled.

Would you use the set screws to tighten the lens? Or just tighten enough for snug fit and use epoxy to fix it in place? My guess is over-tightening set screw risks shattering the lens.