Old 04-24-2016, 10:31 PM #1
Minamoto Kobayashi's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Minamoto Kobayashi Minamoto Kobayashi is online now
Class 2 Laser
Minamoto Kobayashi's Avatar
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Default A CDBEAM 777 great project was stopped .. I need suggestions please!

About 5 months ago I have commissioned to my hero CDBEAM 777 a very special beautiful build, the "Blue Balista" laser.
It uses NUBM07E diode, a lot of customs components and the corrective optics.
This is the awesome 5.3W build with corrective optics:



.. and the marvellous collimated beam (together a similar 520nm build):



(full resolution here: https://www.flickr.com/photos/27318590@N08/26513672832/)

The beam was so well collimated to the infinity that also without a beam expander I can hit the clouds with small spot!

The problems.
---------------

The Linos Beam Expander and other expanders needs precise specs for the input beam.
For example, Hercules use DPSS tecnology, the beam is near tem00, it has a small diameter and it has low divergence, so absolutely no problems
to use it with any beam expander.
In the world of multimode diode the music is somewhat different: slow/fast axis, high divergence and high powered beam can create big issues.
The Blue Balista laser was perfectly collimated to the infinity, but the beam at the aperture was not suitable for the Linos beam expander.
In my precedent high powered 450nm build I was able to collimate the dead focus ad about 7 cm from the aperture because I had the G2 lens easily
accessible.
The correct regulation of the input beam is needed because the beam need to enter into the first small lens not focused to avoid to burn the lens coating.
The dead focus is so created inside the Linos BE, between the first and the second lens; in that way I will save the coating and obtain a
decent GAP between the min and the max focus regulation (I will have a dead focus at about 50 cm from the Linos BE aperture, and a focus to
the infinity when I rotate both the focus mechanisms at about 50% of the entire thread).
Also, in no condition the beam inside the Linos exceed the diameter of the lens, so I will not have any loss of power.

Unluckly the coating of my partucular brand new expensive Linos BE had a coating of 355nm. This coating was strong enough to bear a not-collimated
450nm beam from my precedent build, but its damage threshold was not enough high for my 465nm, 5.3W collimated beam build.
The beam was too strong and too much collimated, and the power dissipated by the not ideal coating exceeded the damage threshold of the coating
itself, so I have almost instantly destroyed the coating (a lot of smoke inside the Linos BE !!)

The internal G2 lens cannot be rotated for two important facts:

1) It is difficult to remove the acrylic canopy without scratch it;
2) I will lose the perfect collimation and the beam quality.

So now I'm facing two big problems:

1) To found a company that can decoat and recoat my damaged lenses with the right coating;
2) To found a particular lens to put just inside the beam aperture, before the beam expander, to obtain a focus at about 7cm from the aperture.

Since the build has a deep hole inside the aluminum barrell, I can create a cylindrical lens holder with the outside diameter suitable for the hole,
and the inside diameter suitable for the lens.
So I can glue the lens inside the holder, and then I can move the custom lens holder along the entire barrell hole to change the focus point.
When I have found the correct focus point I can glue also the holder with a little drop of thermal compound to keep the holder in place forever.
At this point I ask to the expert guys of LPF what kind of lens I can use for my purpose. I already tried with a extra G2 lens, but it create a dead
focus at only 1 mm from the surface !!
I need a lens that create a focus at a certain distance. I can have much play with my custom lens holder in and out, so I can found easily the right
focus position.


__________________
- Sinner Cypreus II 18650 405nm 1000 mW
- Jayrob Aurora Stainless Steel 18650 445nm 891 mW Average 950 mW Peak
- Jayrob Frankenstein 445nm 2875 mW Average 3108 mW Peak With Modified Recoated Laserglow 10x Beam Expander
- Jetlaser PL-E Pro Focusable 445 nm 4000 mW Peak 3500 mW Average With Jetlaser 10x Beam Expander
- Mrcrouse Zaser Black Anodized Custom Head/Pill 445 nm 4970 mW Peak 4670 mW Average With Laserglow Modified Recoated 10x Beam Expander
- Sinner Cypreus IIIb 450nm 4757mW With Three Elements Glass Lenses And Adapted Linos 10x Beam Expander
- Sinner Cypreus II XL Gold Plated 24k 465nm 4200 mW Peak With Three Elements Glass Lenses
- CDBEAM Blue Balista 467nm 5088mW Optical Corrected 8 Lenses System
- Mrcrouse Zaser XL II Silver Metallized Paint 520nm 1350mW Peak With Corrective Optics And Linos Beam Expander
- CDBEAM Verde Volcano 520nm 2600 mW Dual Diode Build With PBS, Corrective Optics, Variable Output Power And 10x Variable Magnification Linos Beam Expander
- Laserglow Hercules 600 532nm 650 mW With Adapted 8x Linos beam expander
- Jayrob Aurora Stainless Steel 18650 532nm 195mW Peak 181 mW Average
- Jayrob Aurora Stainless Steel 18650 635nm 284 mW Peak 271 mW Average
- Sci-Fi Lasers Arcane II 635nm Light Gray Metallic Powder Coated 675 mW Peak 645 mW Average With Three Elements Glass Lenses
- Jayzereer C-Mount Red Mag Build 650nm 1600 mW

- Aurora SH-032 Stainless Steel 160 Lumens
- Nitecore TN36UTvn Modded Ultra-Directive 1 MLux !!
- Fenix TK75vnQ Modded Ultra Flood & Throw 14.000 Lumens
- Fire-Foxes FF4 6000 Lumens

- Laserbee 7 Watt Laser Power Meter Ophir Thermopile

Last edited by Minamoto Kobayashi; 04-25-2016 at 12:39 AM.
Minamoto Kobayashi is online now   Reply With Quote








Old 04-24-2016, 10:37 PM #2
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,190
Rep Power: 6621
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
RedCowboy RedCowboy is online now
Class 3B Laser
RedCowboy's Avatar
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,190
Rep Power: 6621
RedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond reputeRedCowboy has a reputation beyond repute
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

Found a company that can decoat and recoat my damaged lenses with the right coating.

^ That sounds good. ^

Did it work ok otherwise?
__________________
You can not put freedom in a bag.
It is in fact an abstract concept.
Yet it is the single most valuable thing anyone has ever had.
RedCowboy is online now   Reply With Quote
Old 04-24-2016, 10:42 PM #3
Minamoto Kobayashi's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Minamoto Kobayashi Minamoto Kobayashi is online now
Class 2 Laser
Minamoto Kobayashi's Avatar
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

Sorry I have forgot the "to" LOL ... I'm searching for ...
Now the lens are totally unusables. I must remove the destroyed coating ad recoat with the right coating (460-470 nm)
__________________
- Sinner Cypreus II 18650 405nm 1000 mW
- Jayrob Aurora Stainless Steel 18650 445nm 891 mW Average 950 mW Peak
- Jayrob Frankenstein 445nm 2875 mW Average 3108 mW Peak With Modified Recoated Laserglow 10x Beam Expander
- Jetlaser PL-E Pro Focusable 445 nm 4000 mW Peak 3500 mW Average With Jetlaser 10x Beam Expander
- Mrcrouse Zaser Black Anodized Custom Head/Pill 445 nm 4970 mW Peak 4670 mW Average With Laserglow Modified Recoated 10x Beam Expander
- Sinner Cypreus IIIb 450nm 4757mW With Three Elements Glass Lenses And Adapted Linos 10x Beam Expander
- Sinner Cypreus II XL Gold Plated 24k 465nm 4200 mW Peak With Three Elements Glass Lenses
- CDBEAM Blue Balista 467nm 5088mW Optical Corrected 8 Lenses System
- Mrcrouse Zaser XL II Silver Metallized Paint 520nm 1350mW Peak With Corrective Optics And Linos Beam Expander
- CDBEAM Verde Volcano 520nm 2600 mW Dual Diode Build With PBS, Corrective Optics, Variable Output Power And 10x Variable Magnification Linos Beam Expander
- Laserglow Hercules 600 532nm 650 mW With Adapted 8x Linos beam expander
- Jayrob Aurora Stainless Steel 18650 532nm 195mW Peak 181 mW Average
- Jayrob Aurora Stainless Steel 18650 635nm 284 mW Peak 271 mW Average
- Sci-Fi Lasers Arcane II 635nm Light Gray Metallic Powder Coated 675 mW Peak 645 mW Average With Three Elements Glass Lenses
- Jayzereer C-Mount Red Mag Build 650nm 1600 mW

- Aurora SH-032 Stainless Steel 160 Lumens
- Nitecore TN36UTvn Modded Ultra-Directive 1 MLux !!
- Fenix TK75vnQ Modded Ultra Flood & Throw 14.000 Lumens
- Fire-Foxes FF4 6000 Lumens

- Laserbee 7 Watt Laser Power Meter Ophir Thermopile

Last edited by Minamoto Kobayashi; 04-24-2016 at 10:45 PM.
Minamoto Kobayashi is online now   Reply With Quote
Old 04-30-2016, 06:12 PM #4
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Southwest Asia
Posts: 5,913
Rep Power: 6889
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Alaskan Alaskan is offline
Class 4 Laser
Alaskan's Avatar
 
Join Date: Jan 2014
Location: Southwest Asia
Posts: 5,913
Rep Power: 6889
Alaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond reputeAlaskan has a reputation beyond repute
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

I tried to find a place to coat a lens for me and they wouldn't do a custom job for less than like 1800 dollars, if I remember correctly. I am interested in know who they are, if they can do that job far cheaper, but not in the hundreds of dollars.
__________________

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

Laser Safety: http://www.laserpointersafety.com/index.html

Sam's Laser FAQ: Sam's Laser FAQ: Welcome Page

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
Alaskan is offline   Reply With Quote
Old 04-30-2016, 10:48 PM #5
paul1598419's Avatar
Class 3B Laser
 
Join Date: Sep 2013
Location: Washington State
Posts: 2,734
Rep Power: 4509
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
paul1598419 paul1598419 is online now
Class 3B Laser
paul1598419's Avatar
 
Join Date: Sep 2013
Location: Washington State
Posts: 2,734
Rep Power: 4509
paul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond reputepaul1598419 has a reputation beyond repute
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

That's a shame that you didn't get the correct AR coating to begin with. I fear this will cost you plenty. I feel for you.
__________________
405nm Laser Pointer 45mW
405nm C11 700mW
405nm Laser Shack Pointer 80mW
445nm 1.75 watts SkyRay Gifted
445nm 3 watts MS-SSW-II
445nm 2.2 watts Nichia MS Envy

445nm 2 watt SMP Copper Host
488nm Uniphase #2201-20SLAT argon laser head and power supply >40mW
532nm 200mW thermostatically Fan Cooled (Besram) >230mW
532nm 189mW pocket lab laser
532nm lasers X6 100mW-200mW
532nm lasers X4 75mW- 140mW
632.8nm P210 New Laser Tube 0.57mW Melles Griot 05-LMP-827-037 PSU New
632.8nm Spectra- Physics He- Ne #102-2 4mW heads X2 and #236 power supply
632.8nm PMS He-Ne # 201P/ LPS-115 2mW
632.8nm Siemens HeNe LGK7630S 7.6mW
635nm 1 watt Cyprus II
635nm 1 watt SMP Copper host
635nm 5mW pointer
635nm 100mW pointer
650nm 65mW pointer
650nm 380mW 501B
808nm 1+W infrared laser
infrared video camera for collimating IR lasers
Ocean Optics USB2000 Spectrometer
Scientech Vector S310 with AC2500 10 Watt LPM
LaserBee II 3.2 Watt LPM
Radiant X4 3.7 Watt LPM
Eisco Scientific Spectroscope 400nm- 700nm
paul1598419 is online now   Reply With Quote
Old 04-30-2016, 11:31 PM #6
Minamoto Kobayashi's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Minamoto Kobayashi Minamoto Kobayashi is online now
Class 2 Laser
Minamoto Kobayashi's Avatar
 
Join Date: Aug 2010
Location: Padova - Italy
Posts: 384
Rep Power: 945
Minamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond reputeMinamoto Kobayashi has a reputation beyond repute
Send a message via Skype™ to Minamoto Kobayashi
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

Nice updates friends!

First of all, at about 7 miles from my home I have found a glass company that owns a very expensive programmable coating machine.
The problem is the decoating procedure.
Usually there are two methods ... the best results are achieved with the use of fluoridre compound, but it can be applied only to the quartz lenses.
The other method, solphoric acid at 120 C, works well with fused silica lenses, but the results could be poor. In fact, the silica lenses can lose part of its properties, and part of the coating could remain over the lenses.
The consequential issues are mainly two: an halo around the dot and a significant loss of power (20-25% against the 2% of a quality lens!)
The ideal scenario will be to have the original lenses uncoated, but for the Linos BE it is really impossible!
However, I will try, stay tuned!

About the beam focus, I talked with a very kind gentleman from Edmund optics that have suggested me this kind of lens:

6.0mm Dia. x 72.0mm FL, VIS 0, Inked, Plano-Convex Lens

To work properly, Linos BE needs an input beam with some precise specs.
I learned from my previous experiences that the Linos work very well with thin DPSS tem00 beams, but for the multimode diodes the music is totally different: I need to collimate a dead focus inside the BE, between the second and the third lens.
I measured with digital caliper the correct focus distance, and it is about 70mm from the G2 lens (or from the convex surface of the above mentioned lens).
In that way I do not risk to damage the coating (a too much focused beam against a coated lens can heavily damage the coating itself because the power will exceed the coating threshold damage).
And as a nice side effect, I will obtain a nice GAP in the LINOS BE focusing regulations.
In fact a wrong convergent or divergent beam can create either a too short focus or a too long focus.
In my sleepless nights, on top of the chimney of my building, I really tried everything
The ideal setting will be achieved when the minimum focus is reached at about 50 cm from the Linos BE aperture (both the focusing regulations at the minimum, aka completely screwed), while the focus to the infinity will be reached with both the focusing mechanisms at 50% of the entire course.
So the CDBeam777/Minamoto Kobayashi project continues, and will be really a laser with "attributes" ... stay tuned !!
__________________
- Sinner Cypreus II 18650 405nm 1000 mW
- Jayrob Aurora Stainless Steel 18650 445nm 891 mW Average 950 mW Peak
- Jayrob Frankenstein 445nm 2875 mW Average 3108 mW Peak With Modified Recoated Laserglow 10x Beam Expander
- Jetlaser PL-E Pro Focusable 445 nm 4000 mW Peak 3500 mW Average With Jetlaser 10x Beam Expander
- Mrcrouse Zaser Black Anodized Custom Head/Pill 445 nm 4970 mW Peak 4670 mW Average With Laserglow Modified Recoated 10x Beam Expander
- Sinner Cypreus IIIb 450nm 4757mW With Three Elements Glass Lenses And Adapted Linos 10x Beam Expander
- Sinner Cypreus II XL Gold Plated 24k 465nm 4200 mW Peak With Three Elements Glass Lenses
- CDBEAM Blue Balista 467nm 5088mW Optical Corrected 8 Lenses System
- Mrcrouse Zaser XL II Silver Metallized Paint 520nm 1350mW Peak With Corrective Optics And Linos Beam Expander
- CDBEAM Verde Volcano 520nm 2600 mW Dual Diode Build With PBS, Corrective Optics, Variable Output Power And 10x Variable Magnification Linos Beam Expander
- Laserglow Hercules 600 532nm 650 mW With Adapted 8x Linos beam expander
- Jayrob Aurora Stainless Steel 18650 532nm 195mW Peak 181 mW Average
- Jayrob Aurora Stainless Steel 18650 635nm 284 mW Peak 271 mW Average
- Sci-Fi Lasers Arcane II 635nm Light Gray Metallic Powder Coated 675 mW Peak 645 mW Average With Three Elements Glass Lenses
- Jayzereer C-Mount Red Mag Build 650nm 1600 mW

- Aurora SH-032 Stainless Steel 160 Lumens
- Nitecore TN36UTvn Modded Ultra-Directive 1 MLux !!
- Fenix TK75vnQ Modded Ultra Flood & Throw 14.000 Lumens
- Fire-Foxes FF4 6000 Lumens

- Laserbee 7 Watt Laser Power Meter Ophir Thermopile

Last edited by Minamoto Kobayashi; 04-30-2016 at 11:34 PM.
Minamoto Kobayashi is online now   Reply With Quote
Old 04-30-2016, 11:38 PM #7
VirtueViolater's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Mobile Alabama
Posts: 945
Rep Power: 655
VirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond repute
VirtueViolater VirtueViolater is offline
Class 2M Laser
VirtueViolater's Avatar
 
Join Date: Mar 2016
Location: Mobile Alabama
Posts: 945
Rep Power: 655
VirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond reputeVirtueViolater has a reputation beyond repute
Default Re: A CDBEAM 777 great project was stopped .. I need suggestions please!

Quote:
Originally Posted by Minamoto Kobayashi View Post
Nice updates friends!

First of all, at about 7 miles from my home I have found a glass company that owns a very expensive programmable coating machine.
The problem is the decoating procedure.
Usually there are two methods ... the best results are achieved with the use of fluoridre compound, but it can be applied only to the quartz lenses.
The other method, solphoric acid at 120 C, works well with fused silica lenses, but the results could be poor. In fact, the silica lenses can lose part of its properties, and part of the coating could remain over the lenses.
The consequential issues are mainly two: an halo around the dot and a significant loss of power (20-25% against the 2% of a quality lens!)
The ideal scenario will be to have the original lenses uncoated, but for the Linos BE it is really impossible!
However, I will try, stay tuned!

About the beam focus, I talked with a very kind gentleman from Edmund optics that have suggested me this kind of lens:

6.0mm Dia. x 72.0mm FL, VIS 0, Inked, Plano-Convex Lens

To work properly, Linos BE needs an input beam with some precise specs.
I learned from my previous experiences that the Linos work very well with thin DPSS tem00 beams, but for the multimode diodes the music is totally different: I need to collimate a dead focus inside the BE, between the second and the third lens.
I measured with digital caliper the correct focus distance, and it is about 70mm from the G2 lens (or from the convex surface of the above mentioned lens).
In that way I do not risk to damage the coating (a too much focused beam against a coated lens can heavily damage the coating itself because the power will exceed the coating threshold damage).
And as a nice side effect, I will obtain a nice GAP in the LINOS BE focusing regulations.
In fact a wrong convergent or divergent beam can create either a too short focus or a too long focus.
In my sleepless nights, on top of the chimney of my building, I really tried everything
The ideal setting will be achieved when the minimum focus is reached at about 50 cm from the Linos BE aperture (both the focusing regulations at the minimum, aka completely screwed), while the focus to the infinity will be reached with both the focusing mechanisms at 50% of the entire course.
So the CDBeam777/Minamoto Kobayashi project continues, and will be really a laser with "attributes" ... stay tuned !!
Good luck, man, your obsessed, I LOVE IT
Great to see such enthusiasm
__________________

Diodes in my collection:
Nubm44 445nm
Nbd7875 445nm
M140 m445nm
Plt450b 445nm
Pl520 520nm
Mitsubishi 500 638nm (ml501p73)
Lpc826 650nm
VirtueViolater is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes




Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:49 AM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC