Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Optics



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 10-13-2015, 10:57 PM #49
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

The splash is not much worse, look at the lens housing, it blocks side splash by design. without glasses on at a distance it looks the same as the 3 element.

Someone asked about the G2.

These pics are both NDB7875's well focused at 14 feet.
The smaller bar is the G7 and the wider bar is the G2.

This is a test at 14 feet.




The G7 starts to burn the plywood from 14 feet in just under 2 seconds, the G2 takes 3.5 - 4 seconds to start burning focused from 14 feet.

Both lasers are NDB7875's

The splash in this clip may seem like the lasers are not at their tightest focus, but they are, the blond plywood reflects a lot around the bar and shows the artifacts.



Last edited by RedCowboy; 10-13-2015 at 11:59 PM.
RedCowboy is online now   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 10-13-2015, 11:07 PM #50
Atomicrox's Avatar
Class 3R Laser
 
Join Date: Jun 2011
Posts: 2,224
Rep Power: 9560
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Atomicrox Atomicrox is offline
Class 3R Laser
Atomicrox's Avatar
 
Join Date: Jun 2011
Posts: 2,224
Rep Power: 9560
Atomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond reputeAtomicrox has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

G7's looking good, then. Might order one in the near future.
__________________
405nm: NewWish (29.1mW avg|5mW rtd) | Dilda (81.5mW avg|200mW rtd) | 501B by Blord (633mW pk)
low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

HV: Flyback, Plasma Speaker, The Arcsynth and SSTC
Atomicrox is offline   Reply With Quote
Old 10-15-2015, 10:24 PM #51
Dreadnought's Avatar
Class 1 Laser
 
Join Date: Aug 2015
Location: United Kingdom
Posts: 71
Rep Power: 146
Dreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond repute
Dreadnought Dreadnought is offline
Class 1 Laser
Dreadnought's Avatar
 
Join Date: Aug 2015
Location: United Kingdom
Posts: 71
Rep Power: 146
Dreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond reputeDreadnought has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

Yeah, might order one too.

Its pretty good, has a smaller dot at 14 feet and generally seems good for something to burn with but look good at the same time!

Have fun
Dreadnought is offline   Reply With Quote
Old 10-15-2015, 11:56 PM #52
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

Just remember that with 9mm size diodes in the standard 12mm housings that these focus out near the end of the threads, with 5.6mm diodes you have a couple more turns left because the emitter sits further back, but you need to use the wider 9mm size spring.

Last edited by RedCowboy; 10-16-2015 at 12:06 AM.
RedCowboy is online now   Reply With Quote
Old 10-21-2015, 06:21 PM #53
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
barthchris barthchris is offline
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

These lens's look great!

Reminds me of the 2 element lens that was/is? sold by Olike, I liked them better than the 3 element, but they are harder to find. The difference is this new G7 looks to tighten the whole output of the diode compared to the 2 and 3 element lens clipping the edges of the diode output in addition to the extra elements doing their collimating magic.

I never could stand the G2 lens with multimode diodes, IMO the wide divergence just looks horrible, maybe OK if your into burning but when focused to infinity, ugh! I do love the G2 with 405nm diodes though.
barthchris is offline   Reply With Quote
Old 10-24-2015, 03:30 PM #54
Podo's Avatar
Class 2M Laser
 
Join Date: Nov 2013
Location: Hong Kong
Posts: 520
Rep Power: 4108
Podo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond repute
Podo Podo is offline
Class 2M Laser
Podo's Avatar
 
Join Date: Nov 2013
Location: Hong Kong
Posts: 520
Rep Power: 4108
Podo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond reputePodo has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

Thanks for the review RedCowboy

Actually the 9mm holder is too thick, it somehow affects the performance of the laser.

If you look on to sanwu's 5mm holder:


The holder is much slimmer which let the g7 lens to reveal its full potential.

I advices people to buy the lens itself and install the their own suitable holders.

Last edited by Podo; 10-24-2015 at 03:32 PM.
Podo is offline   Reply With Quote
Old 10-24-2015, 08:45 PM #55
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

Quote:
Originally Posted by Podo View Post
Thanks for the review RedCowboy

Actually the 9mm holder is too thick, it somehow affects the performance of the laser.

If you look on to sanwu's 5mm holder:


The holder is much slimmer which let the g7 lens to reveal its full potential.

I advices people to buy the lens itself and install the their own suitable holders.
Can you show some more pics of that next to the 9mm holder from top and side view.
Is the width the same, is it 5mm long or wide?
Some side by side pics would help.
I do like the lens and I may well make my own holders.
RedCowboy is online now   Reply With Quote
Old 10-27-2015, 01:28 PM #56
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
barthchris barthchris is offline
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

I'm glad that the optics side of the hobby is getting some more attention!

I may have missed it but where can I purchase one of these lens's?
Are the thin lens holders available for sale from anyone or is it DIY?

Chris
barthchris is offline   Reply With Quote
Old 10-27-2015, 11:49 PM #57
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

Quote:
Originally Posted by barthchris View Post
I'm glad that the optics side of the hobby is getting some more attention!

I may have missed it but where can I purchase one of these lens's?
Are the thin lens holders available for sale from anyone or is it DIY?

Chris
Yes I have been working with wider longer focal length lens and lens pairs to greatly extend burning range without reshaping the beam.
I have started using the G7 and G2/G9 to bring the highly divergent axis in, not to a focus, just enough get the edges out of the housing threads and then focus from a wider beam to a burning point at a much longer range than any of these off the shelf lenses can.

The beam however looks like a flat funnel but it works.
I'm waiting for cylindrical pairs to reshape the beam and tame that wild axis and try to get a better solid beam, I know nothing is going to yield longer distance energy density as well as starting from an expanded diameter, but the challenge is to get a more solid beam with low divergence from affordable multimode power.

I still remember when WL first advertised the 1w arctic, it claimed 1.5 mrad and TEM00.
I was very excited, I was expecting something like a 1w blue beam comparable to a red 660nm pointer, man did they ever lie, and then I waited months and finally took a refund because they underpriced their product and couldn't deliver.
Needless to say they lost my business, I bought some of their stuff second hand but never directly.

I hope great things are to come, I would love to see some high quality high power single mode equal divergent fast slow axis diodes, but we may be focusing the hell out of super bright led's in the times ahead.

I wont give up though, even if I have to pump my own crystals, it's going t be a sight too see.
RedCowboys 75 pound laser pointer. LOL

Oh, you asked where to buy a G7?
Here:
https://sites.google.com/site/hkfew5e22/

Last edited by RedCowboy; 10-27-2015 at 11:51 PM.
RedCowboy is online now   Reply With Quote
Old 10-28-2015, 04:55 AM #58
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: New G7 lens for 445nm / 462nm / 520nm

I agree with you on the multimode laser diodes, the beam looks like a ribbon to me with the slow axis part of the beam being so thin and the fast axis so wide. I've figured out how to make beam expanders but the next progression for me is to correct the slow axis to match the same width as the fast axis so it looks more like a square instead of a ribbon.

Regarding your "75 pound pointer" project, I found this big lens for my next heavy pointer project (well, a bit too heavy to be a "pointer" or hand held unit) but it has terrible scratches on it, anyone have a good way to remove them, buff them out without destroying the curve on the lens? I've even considered taking the lens to a automobile windshield repair service and have them fill in the scratches with that resin they use. I don't need perfect, but would like to get rid of the scratches without changing the curve.



Here was my last big pointer, this one was close to 75 pounds:

__________________

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.
.........................
PhotoB****t high jacking you too? Use this link instead:
http://imgbb.com

High resolution of my avatar: https://ibb.co/fWOhXF

Last edited by Alaskan; 10-28-2015 at 02:10 PM.
Alaskan is offline   Reply With Quote
Old 10-28-2015, 05:57 AM #59
Ricker's Avatar
Class 2M Laser
 
Join Date: Oct 2015
Location: Bangor, Maine
Posts: 510
Rep Power: 15152
Ricker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond repute
Ricker Ricker is online now
Class 2M Laser
Ricker's Avatar
 
Join Date: Oct 2015
Location: Bangor, Maine
Posts: 510
Rep Power: 15152
Ricker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond reputeRicker has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

^^Ugh! I hate being too new to know if you're kidding or not! :P
__________________

Safety: Eagle PairŪ 190-540nm & 800-2000nm Laser Safety Goggles
Misc. Hardware:TENMA 35V/5A Variable Power Supply.
FLIR One Thermal Imaging Camera. Fluke 115 True RMS Digial Multimeter. And Much More!



->My Thermal Imaged Lasers Thread<-
->My First Build!<-
NEW! 2/18/16
Ricker is online now   Reply With Quote
Old 10-28-2015, 01:12 PM #60
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: New G7 lens for 445nm / 462nm / 520nm

Nope, i like low divergence, thsse are legit projects.
__________________

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.
.........................
PhotoB****t high jacking you too? Use this link instead:
http://imgbb.com

High resolution of my avatar: https://ibb.co/fWOhXF
Alaskan is offline   Reply With Quote
Old 10-28-2015, 08:09 PM #61
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

They make a lot of lens scratch filler stuff, but I have doubts that it will work for a focusing lens.

Re grinding is the right way, but is it worth that, maybe if you could find a lens grinding service and send it off, they will have the right equipment.

I think they start coarse and work down finer and finer with the polishing compound and stick it under a rotating orbital polishing deal to get an even shape.

Your octal laser looks huge, like the size of a table, how wide is that?
RedCowboy is online now   Reply With Quote
Old 10-28-2015, 08:48 PM #62
Alaskan's Avatar
Class 4 Laser
 
Join Date: Jan 2014
Location: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: Currently in Iraq.
Posts: 7,044
Rep Power: 45891
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: New G7 lens for 445nm / 462nm / 520nm

Not that big, maybe 18 inches. Need to find an economy lens shop, this glass isn't high quality BK7, its cheap glass used as an old TV magnifier.
Alaskan is offline   Reply With Quote
Old 10-29-2015, 01:47 PM #63
RedCowboy's Avatar
Class 3B Laser
 
Join Date: Jul 2015
Location: Suburbs of Atlanta Georgia
Posts: 4,792
Rep Power: 37125
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: 4,792
Rep Power: 37125
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: New G7 lens for 445nm / 462nm / 520nm

After doing further testing with a m-140 by switching back and forth between the 3 element, G7 and G2 using the same test diode with charged quality cells from a cold start it has become apparent that the G7 lets more power through.

At 14 feet with a M-140 focused onto plywood.
Time to see any burn mark appear is
3 ele------ 3.0 seconds
G7---------2.0 seconds
G2---------6.0 seconds

The G7 focuses near the end of the standard 12mm module in the 9mm long housing, but power is better, if someone with a LPM could check these I think we will see a noticeable difference.

I just ordered more G7's in the 5mm long housing, they fit the 12mm module and should have a better grip on the threads as per the design.
The lens has more threads behind it, these will probably replace all my 3 elements.

podo said express shipping is available by adding extra engrave service, 2 day shipping.

I don't know why but some of my 3 element lenses are not burning right, some 3 element lenses work well and some seem to focus but they don't burn well at all, I have checked that the lens ring is tight.
I'm going to check under the microscope, maybe the AR coating is burning off? I have noticed some dishwater big spots when focusing from raw output viewing a walls worth of light, also some 3 elements seem to focus a little further out.
I have been marking when and where I buy them, but supposedly they all come from China, they are not dirty, it's almost as if they wear out somehow, I think it may be the coating burning off, I'm trying to figure it out.

So far the best 3 elements I have bought come from Aixiz, but they do cost more, I'm trying to make sense of this, I really like the output of the G7.
G2's at 5 times the price that make a line twice as long are not the answer, I think the G7 in the 5mm housings are going to be the new standard. So far they burn better in front of every type of diode.


I have been marking what I buy when and from where and the thing that seems to happen is the 3 element will still focus but it loose burning ability, not completely, but it won't burn nearly as fast at 14 feet.
I am suspecting ar coating burn off, but I very well could be wrong.
But as this G7 is a single element and burns better I might be done with 3 elements.

Last edited by RedCowboy; 10-29-2015 at 05:21 PM.
RedCowboy is online now   Reply With Quote
Old 10-29-2015, 04:48 PM #64
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
barthchris barthchris is offline
Class 1 Laser
 
Join Date: Jul 2009
Location: Huntingtown, Maryland, USA
Posts: 56
Rep Power: 96
barthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond reputebarthchris has a reputation beyond repute
Default Re: New G7 lens for 445nm / 462nm / 520nm

I've noticed that with some of the 3 element lens's as well some are good and some suck. Checked that lens's were installed correctly and are tight. Ive also noticed the coatings are different, some have it and some dont???? When I mean no coating, I mean no coating. Im not mixing up coating for 445nm vs 635nm.

You can definitely tell that part of the diode output is being clipped with all of the 3 element though. Ive wondered how much of that clipped output is converted to heat, especially since most of the lens holders have a matt black color to them.
barthchris 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


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f49/new-g7-lens-445nm-462nm-520nm-92729.html
Posted By For Type Date
Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm This thread Refback 07-14-2015 02:56 PM
[Holding] New G7 lens GB with 9mm/8.8mm holder This thread Refback 05-23-2015 08:21 PM
New G7 lens for 445nm / 462nm / 520nm This thread Refback 04-24-2015 09:10 PM










Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
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 09:54 PM.


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