Milos
0
- Joined
- Apr 22, 2007
- Messages
- 862
- Points
- 28
I'll try to do this as simply and as fairly as i can considering lack of time. I understand there is competition between two parties and even blames of "unfair play" so whatever needs to be added to this thread, feel free to state as long as it is A FACT!
I ordered two lenses from Jayrob, and two from Larry.
I used Kenom thermal meter and my Stingray II red and violet lasers. *
lasers;
Stingray II VIOLET *- 230mA 332mW without lens
Stingray II RED - 460mA 338mW without lens
NOTE: Kenom thermal meter sensor is very sensitive to position, spot size, and even focus of the beam hitting it. any variations (even slight wind from outside, or heat radiation from warm heat sink being within 1/2" of sensor will change numbers. I worked around all this and was very consistent with distance from sensor, position of "dot" on sensor, and having best collimation possible checked at 20ft. I also *repeated all tests 2-3 times in circles to make sure things aren't changing as i go.
The difference between Jay's and Larry's mounting of lens is well covered in their threads in buy/sale/trade sections. Pictures re there too, so i won't talk about it too much.
I don't mind at all if arguments on how and why things were done by each continue here. This thread is made so its neutral ground as far as refreshing sales threads go
NOTE, since these tests were done, both Jayrob and Larry have made improvements in their lens assembly designs as far as mounting glass goes. See their threads for details and availability.
Here are my numbers:
~405nm Violet diode from GGL-H20W sled at 230mA
-No lens = 332mW
-Standard Aixiz Glass lens = 242mW
-Standard Aixiz Acrylic lens opened on the back = 258mW
-Larry 405-G-1 lens = 320mW
-Jayrob 405-G-1 lens = 320mW
Aixiz standard Glass lens lets 73% light through (blocks 27%)
Acrylic Lens lets 77.5% light through (blocks 22.5%)
Aixiz 405 AR coated glass lens (July '09) lets 81.4% light through (blocking 18.6%) - more on it on PAGE 4! post #86
405-G-1 lens lets 96.5% light through (blocks 3.5%)
405-G-1 lens has 24% increase of power output over Aixiz acrylic lens
Splash around well collimated beam/dot is IDENTICAL between Jay's and Larry's lens assembly! *which should not be confusing. I know this is very important to many.
Focal length seems exactly the same.
Conclusion: Same lens (as far as performance goes) different mounting style.
Both Larry and jay use teflon tape to reduce play in threads and it works very well! Teflon does wear off if you take lens on and off few times, but i think its good idea.
Jay cuts spring in half and it fits like that reducing play and giving resistance.
I put some arctic silver 5 in threads ( because arctic silver doesn't spill when hot), in combination with springs, but i will use teflon in combination with other two. Doing all 3 really makes it feel right!
RED ~658nm *Long open can diode 460mA
-No lens =338mW
-Standard Aixiz Glass lens = 278mW
-Standard Aixiz Acrylic lens opened on the back =268mW
-Larry 405-G-1 lens = 308mW
-Jayrob 405-G-1 lens = 314mW
-Jayrob Meredith glass mod for aixiz lens = 322mW - more on it on PAGE 3! - post #67
Aixiz standard Glass lens lets 82% light through (blocks 18%)
Acrylic Lens lets 79.5% light through (blocks 20.5%)
Jay's 405-G-1 lens lets 93% light through (blocks 7%)
Larry's 405-G-1 lens lets 91% light through (blocks 9%)
Jayrob Meredith glass mod for aixiz lens lets 95.3% light through (blocks only 4.7%)
Increase in output power of Jay's * *405-G-1 lens over standard Aixiz glass lens = 13%
Increase in output power of Larry's 405-G-1 lens over standard Aixiz glass lens = 10.5%
Increase in output of Jay's Meredith glass mod for aixiz glass lens over standard Aixiz glass = 15.8%
Splash around well collimated beam/dot is IDENTICAL between Jay's and Larry's lens assembly! *
Focal length seems exactly the same.
Projected dot of Meredith glass lens mod appears the same as 405-G-1 lens when use on VIOLET or RED diodes. In other words, photo of 405nm and 658nm splash still counts for this Meredith lens. I was very pleased to see even better results than with 405-G-1 lens, although beam diameter is slightly bigger. Still, it is noticeably tighter than standard aixiz glass.
This was interesting difference in performance between as Jay's and Larry's 405-G-1 lens, as Jay's repeatedly showed better performance. And repeatedly is what i look for. So I looked at both lenses again and realized the reason.
Opening on the back of Jays lens is machined out measuring 5.6mm hole for light to come in. Larry's back of the lens uses retaining spring with glue to hold the lens from falling out from the back leaving only 4.25mm wide hole for light to come in.
This came to be important with red diodes as for best collimation lens is a bit farther from the diode and bigger hole is needed. With 405nm diodes this did not come into effect as lenses need to be very close to diode and Larry's opening was big enough.
EDITED. It has come to my attention that Larry has improved his lens assembly after this find, to widen the input side and accommodate it for better red laser performance.
I personally like jay's approach to creating assembly as it doesn't involve any glue or retaining springs, and everything is made "to fit". Larry has different approach and regardless of it his assembly performs comparably to Jays when it comes to 405nm, however not quite as advertised as far as splash goes.
All in all, these tests are my and open for discussion. Your tests might differ as measuring styles differ, but we are dealing with percents so it shouldn't differ too much.
The important thing specially with violet lasers is keeping strict consistency of physical setup while testing. I can do different setup with different lenses and calculate different percentage easily.
best regards
Miloš
I ordered two lenses from Jayrob, and two from Larry.
I used Kenom thermal meter and my Stingray II red and violet lasers. *
lasers;
Stingray II VIOLET *- 230mA 332mW without lens
Stingray II RED - 460mA 338mW without lens
NOTE: Kenom thermal meter sensor is very sensitive to position, spot size, and even focus of the beam hitting it. any variations (even slight wind from outside, or heat radiation from warm heat sink being within 1/2" of sensor will change numbers. I worked around all this and was very consistent with distance from sensor, position of "dot" on sensor, and having best collimation possible checked at 20ft. I also *repeated all tests 2-3 times in circles to make sure things aren't changing as i go.
The difference between Jay's and Larry's mounting of lens is well covered in their threads in buy/sale/trade sections. Pictures re there too, so i won't talk about it too much.
I don't mind at all if arguments on how and why things were done by each continue here. This thread is made so its neutral ground as far as refreshing sales threads go
NOTE, since these tests were done, both Jayrob and Larry have made improvements in their lens assembly designs as far as mounting glass goes. See their threads for details and availability.
Here are my numbers:
~405nm Violet diode from GGL-H20W sled at 230mA
-No lens = 332mW
-Standard Aixiz Glass lens = 242mW
-Standard Aixiz Acrylic lens opened on the back = 258mW
-Larry 405-G-1 lens = 320mW
-Jayrob 405-G-1 lens = 320mW
Aixiz standard Glass lens lets 73% light through (blocks 27%)
Acrylic Lens lets 77.5% light through (blocks 22.5%)
Aixiz 405 AR coated glass lens (July '09) lets 81.4% light through (blocking 18.6%) - more on it on PAGE 4! post #86
405-G-1 lens lets 96.5% light through (blocks 3.5%)
405-G-1 lens has 24% increase of power output over Aixiz acrylic lens
Splash around well collimated beam/dot is IDENTICAL between Jay's and Larry's lens assembly! *which should not be confusing. I know this is very important to many.
Focal length seems exactly the same.
Conclusion: Same lens (as far as performance goes) different mounting style.
Both Larry and jay use teflon tape to reduce play in threads and it works very well! Teflon does wear off if you take lens on and off few times, but i think its good idea.
Jay cuts spring in half and it fits like that reducing play and giving resistance.
I put some arctic silver 5 in threads ( because arctic silver doesn't spill when hot), in combination with springs, but i will use teflon in combination with other two. Doing all 3 really makes it feel right!
RED ~658nm *Long open can diode 460mA
-No lens =338mW
-Standard Aixiz Glass lens = 278mW
-Standard Aixiz Acrylic lens opened on the back =268mW
-Larry 405-G-1 lens = 308mW
-Jayrob 405-G-1 lens = 314mW
-Jayrob Meredith glass mod for aixiz lens = 322mW - more on it on PAGE 3! - post #67
Aixiz standard Glass lens lets 82% light through (blocks 18%)
Acrylic Lens lets 79.5% light through (blocks 20.5%)
Jay's 405-G-1 lens lets 93% light through (blocks 7%)
Larry's 405-G-1 lens lets 91% light through (blocks 9%)
Jayrob Meredith glass mod for aixiz lens lets 95.3% light through (blocks only 4.7%)
Increase in output power of Jay's * *405-G-1 lens over standard Aixiz glass lens = 13%
Increase in output power of Larry's 405-G-1 lens over standard Aixiz glass lens = 10.5%
Increase in output of Jay's Meredith glass mod for aixiz glass lens over standard Aixiz glass = 15.8%
Splash around well collimated beam/dot is IDENTICAL between Jay's and Larry's lens assembly! *
Focal length seems exactly the same.
Projected dot of Meredith glass lens mod appears the same as 405-G-1 lens when use on VIOLET or RED diodes. In other words, photo of 405nm and 658nm splash still counts for this Meredith lens. I was very pleased to see even better results than with 405-G-1 lens, although beam diameter is slightly bigger. Still, it is noticeably tighter than standard aixiz glass.
This was interesting difference in performance between as Jay's and Larry's 405-G-1 lens, as Jay's repeatedly showed better performance. And repeatedly is what i look for. So I looked at both lenses again and realized the reason.
Opening on the back of Jays lens is machined out measuring 5.6mm hole for light to come in. Larry's back of the lens uses retaining spring with glue to hold the lens from falling out from the back leaving only 4.25mm wide hole for light to come in.
This came to be important with red diodes as for best collimation lens is a bit farther from the diode and bigger hole is needed. With 405nm diodes this did not come into effect as lenses need to be very close to diode and Larry's opening was big enough.
EDITED. It has come to my attention that Larry has improved his lens assembly after this find, to widen the input side and accommodate it for better red laser performance.
I personally like jay's approach to creating assembly as it doesn't involve any glue or retaining springs, and everything is made "to fit". Larry has different approach and regardless of it his assembly performs comparably to Jays when it comes to 405nm, however not quite as advertised as far as splash goes.
All in all, these tests are my and open for discussion. Your tests might differ as measuring styles differ, but we are dealing with percents so it shouldn't differ too much.
The important thing specially with violet lasers is keeping strict consistency of physical setup while testing. I can do different setup with different lenses and calculate different percentage easily.
best regards
Miloš
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