Old 02-08-2015, 02:48 PM #1
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Exclamation New G7 lens for 445nm / 462nm / 520nm

Been slience for quite a while, today I came across with a new 7mm lens - G7 as my supplier told me. Looks similiar to G1 with a flat surface.
I believes it's a redesigned g lens for high power & divergence diode like 7875.


Video from starlight comparing other lenses with G7:


G7 is Coated for 400~550nm.
lens area dia: 7mm with 6.4mm of light pass through
Thickness: 2.5mm
barrels : 5mm or 9mm holder
Closest focal length : 8mm


From my full tests on 7875/7675/7A75 today the beam aparture of 7875 is around 5mm with the same dot size as three elements lens. And the rectangle shadow is "gone" too you barely see it if you don't try hard enough.

Readings from my LPM showing the power loss is greater than G2/G1 but better than 3-elements:

445nm 7875 with G2 : 3.5W , divergence >3
445nm 7875 with G7 : 3W , divergence ~1.5
445nm 7875 with 3E : 2.7W , divergence ~1.5

445nm 7A75 with G2 : 5.6W , divergence >4
445nm 7A75 with G7 : 4.9W , divergence >2
445nm 7A75 with 3E : 4.3W , divergence >2

462nm 7675 with G2: 2W divergence >3
462nm 7675 with G7: 1.6W divergence ~1.5
462nm 7675 with 3E: 1.5W divergence ~1.5

445nm 7875 with G2 dot in 4.5m : 1.7cm
445nm 7875 with G7 dot in 4.5m : 0.85cm

445nm 7A75 with G2 dot in 4.5m : 3.4cm
445nm 7A75 with G7 dot in 4.5m : 1.7 cm






My 5x G7 has arrived today:














So in conclusion, G7 produce a beam and dot like 3 element lens usually does but with a more light passing than 3 element lens although not as good as G1/2.

I would suggest to use G7 for a 7475/7675/7875 handheld but not 7A75 as the divergence of 7A75 is too big, only the middle part of the light would contact on the lens.

The post has been edited entirely along with the information... There's huge different from what I said previously but I just want to give the correct information as everybody does here on LPF.



Lenses sent to thejoker301 & starlight for better test and data. :beer

Let's see what is the real deal for this lens.


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Old 02-08-2015, 02:58 PM #2
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Default Re: Doom to 3 elements - New G series lens for 445nm / 520nm

subbing....
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Old 02-08-2015, 03:51 PM #3
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

This looks very interesting. Definitely keeping an eye on this.
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Old 02-08-2015, 04:24 PM #4
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Having such would be a wonderful improvement for high power multi-mode diode pointers, low divergence is the path of the enlightened. Although, I don't really see much improvement in the photograph unless as evidence it is blooming a bit to the cameras view from the higher power?
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Old 02-08-2015, 04:45 PM #5
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Quote:
Originally Posted by Alaskan View Post
Having such would be a wonderful improvement for high power multi-mode diode pointers, low divergence is the path of the enlightened. Although, I don't really see much improvement in the photograph unless as evidence it is blooming a bit to the cameras view from the higher power?
I forgot the "0", it's taken at 10m. thanks for the reminder.
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Old 02-08-2015, 05:11 PM #6
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

My bad, I didn't clue in what you were doing with the photo earlier, you are showing the lower and higher power diodes side by side with the different lenses to illustrate their divergences are similar with the G7, the 7A75 normally having twice as much divergence.

Very nice!
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Old 02-08-2015, 05:43 PM #7
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

lovely. that will really turn up the power density of the 7A75 over distance. I want one

scratch that, I want several

if they were not coated for violet-green, I'd want some for reds too.
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Old 02-08-2015, 06:48 PM #8
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

No more reason for us to nerf 7875 with 3 elements for better divergence I guess....at least from now 7875 would be a real powerful laser diode along with the acceptable beam.
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Old 02-08-2015, 07:41 PM #9
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Impressive. You certainly seem to have good contacts in the laser realm. Thank you for sharing this and also the double beam 638. +rep

Any idea on production/availability and cost?
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Old 02-08-2015, 07:46 PM #10
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

As what I saw in other post, Aixiz is already compare it to G2 lens and selling a new single lens. I don't know if that is referring G7 lens but you can contact aixiz to find out.
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Old 02-08-2015, 08:07 PM #11
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Quote:
Originally Posted by Podo View Post
As what I saw in other post, Aixiz is already compare it to G2 lens and selling a new single lens. I don't know if that is referring G7 lens but you can contact aixiz to find out.
could you clarify what post you refer to and maybe provide a link? I dont see anything matching this description on aixiz, the g2s they list are the same as ones I've already gotten from them before and the wavelegth range does not correspond
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Dominator NUBM07E 465nm 4.3W @3.5A g lens
L2P Nichi@ NDG4216 515nm 110mW @ .35A
501B by Blord osr@m PL520 520nm 95mW @.3A g lens
PL-E pro from Jetlasers nichi@ NDG7475 520nm 980mW, 730mW w/ 10X BE

Lasermax Genesis sight 532nm 5mW
RPL from Optotronics 532nm 450mW

Spartan from Dragonlasers 589nm 50mW
501B HL63133DG 638nm 210mW @.3A g lens
501B Ocl@ro HL63193MG 638nm 960mW @1.3A g lens

501B by Blord LPC 826 660nm 325mW @?A g lens
PL660 from Laserbtb 660nm 1020mW

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Old 02-08-2015, 10:43 PM #12
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Let us know how they compare to the Aixiz "G2", power, and divergence wise if possible please Sir. If a group buy opens up and they are comparable I'll definitely be in on a few!
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Old 02-08-2015, 10:59 PM #13
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Ditto that
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Old 02-09-2015, 02:11 AM #14
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

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Originally Posted by Shakenawake View Post
could you clarify what post you refer to and maybe provide a link? I dont see anything matching this description on aixiz, the g2s they list are the same as ones I've already gotten from them before and the wavelegth range does not correspond
Can't believe what AixiZ did!

You are the only one who replied......
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Old 02-09-2015, 02:33 AM #15
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Oh that one. I dont think those are the same, otherwise, I have a bunch already
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DL matrix and fan transmission gratings

laser powers in sig are about 20 seconds into duty cycle, not peak powers

http://laserpointerforums.com/f39/co...her-94720.html

(I guess I am a vet now)

Last edited by Shakenawake; 02-09-2015 at 02:36 AM.
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Old 02-09-2015, 03:02 AM #16
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Default Re: Doom to 3 elements - New G series lens for 405nm/ 445nm / 520nm

Quote:
Originally Posted by Nute View Post
Let us know how they compare to the Aixiz "G2", power, and divergence wise if possible please Sir. If a group buy opens up and they are comparable I'll definitely be in on a few!

I don't know if my G1/2 is totally the same as the Aixiz "G2" and second my power meter readings cannot be recorded so I couldn't provide a chart to campare G7 to other lenses.

Edited.
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Last edited by Podo; 02-10-2015 at 07:20 PM.
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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
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