Combining lenses for red dot pointers

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Cad Jones
Posts: 11
Joined: Mon Oct 12, 2020 10:24 am
Location: Houston, Texas
Country: USA
Nickname: Cad
Laser Machine Make or Type: Red/Blk 500x700 Ruida RDC6442G w/ Z-bed & Red-Dot
Laser Power: 80w
Laser Bed Size: 700x500 (28x20)
Home Position: TR
RDWorks Version: 8.01.48
Ruida Controller: RDC6442
Accessories: Adjustable Z stepper bed
Want: Auto-Focus
Want: Laser / Red-Dot combiner
Want: Adjustable Lens for pass thru.
Want: Rotary
Need: New mirrors and lens.
Need: S&A 5200 Chiller
Windows Version: 7 64bit

Re: Combining lenses for red dot pointers

Post by Cad Jones »

ah, see that's a completely different design than the Cloudray design in that youtube video.
Andrew Parry
Posts: 21
Joined: Fri Dec 20, 2019 5:18 pm
Location: Worcester
Country: United Kingdom
Nickname: andyspoo
Laser Machine Make or Type: Chinese Red/Black
Laser Power: 60w
Laser Bed Size: 730mm x 600mm
Home Position: TR
RDWorks Version: V8.01.44-191015
Windows Version: Windows 10

Re: Combining lenses for red dot pointers

Post by Andrew Parry »

I just designed and 3D printed this =

Image

I works really well, is pretty easy to align and didn't cost a lot.
The cross lines are thin, it's just that the photo has over exposed the red lines making them look fatter.
Changing the Z axis doesn't change where it crosses, which is what you want.

Andy
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Frank Small
Posts: 43
Joined: Sun Mar 24, 2019 4:12 pm
Location: Bennington, Vermont
Country: USA
Laser Machine Make or Type: 50W China Blue upgraded to Reci 75W tube
Laser Power: 75
Laser Bed Size: 500x300
Home Position: TL
Control Software: LIGHTBURN
RDWorks Version: RDW v8.01.18
Ruida Controller: Other
Accessories: Ruida Controller R644XG
Rotary fixture
Windows Version: Win 10

Re: Combining lenses for red dot pointers

Post by Frank Small »

Hi Andy

I like you cross hair set up. I was thinking doing this for the same reason because the Z axis does not affect the alignment. I went to Russ’s light weight head (Mark I) and C system lens tubes. I purchased the laser units some time ago but have not got to making the brackets. I don’t have a 3D printer but I do have a Bridgeport milling machine (someday I may learn how to use it) so I would most likely make it from aluminum or delrin. I’m glad to see it works for you so I guess it should work for me too.

Thank you so much for sharing.
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Gene Uselman
Posts: 1671
Joined: Thu Jul 07, 2016 3:18 pm
Location: Suburban Minneapolis, Minnesota, US
Country: USA
Nickname: Gene
Laser Machine Make or Type: AKL1318-2
Laser Power: 130W & 80W Reci
Laser Bed Size: 51 x 71
Home Position: TR
Control Software: LIGHTBURN
RDWorks Version: RDw .19 & Lightburn
Ruida Controller: RDC6445
Accessories: I have a combining lenses, pin tables [homebuilt], honeycomb tables , wireless remote, Modifed Ultimate Air Assist, home built non-powered rotary device, Prusa i3 MK3S and Mini Prusa printers.
Windows Version: Win 10 Pro

Re: Combining lenses for red dot pointers

Post by Gene Uselman »

I thought that I replied to this yesterday but... I have just started using Russ' GaAs lenses [very impressed] and they will not pass visible light so I may rig something like this for obtaining the depth at the back of the bed- left to right is pretty easy, depth is hard to judge four feet back with old eyes.
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Andrew Parry
Posts: 21
Joined: Fri Dec 20, 2019 5:18 pm
Location: Worcester
Country: United Kingdom
Nickname: andyspoo
Laser Machine Make or Type: Chinese Red/Black
Laser Power: 60w
Laser Bed Size: 730mm x 600mm
Home Position: TR
RDWorks Version: V8.01.44-191015
Windows Version: Windows 10

Re: Combining lenses for red dot pointers

Post by Andrew Parry »

Your welcome. I've just bought a Cloudray C series head so I'm likely to be making a new version of this which you might find useful for yours.
Frank Small wrote: Sat May 01, 2021 7:04 pm Hi Andy

I like you cross hair set up. I was thinking doing this for the same reason because the Z axis does not affect the alignment. I went to Russ’s light weight head (Mark I) and C system lens tubes. I purchased the laser units some time ago but have not got to making the brackets. I don’t have a 3D printer but I do have a Bridgeport milling machine (someday I may learn how to use it) so I would most likely make it from aluminum or delrin. I’m glad to see it works for you so I guess it should work for me too.

Thank you so much for sharing.
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