Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Ultrafire 501B/Lifetime17 Cu Heatsink x Osram PLTB450B

trephanation

Member
Joined
Jan 12, 2020
Messages
61
Points
18
The threading on that Amazon "Word GX" blue laser I have finally crapped out, so I needed to look elsewhere if I wanted a true utility/burning laser. A week ago I contacted Lifetime17 for a heatsink so I could start on my second build. I originally wanted some sort of 405nm diode, but after reading about how temperamental they are I decided to go with the Osram blue diode. I received the custom copper heatsink as well as simple 501B host very quickly from Rich, and received the diode today and was able to assemble it. I'll update with more beamshots tonight, but even in a sunlit room it still makes the entire room blue and casts shadows. I've got a G2 lens on here and it's actually terrifying how good of a burner it is. The copper heat sink is beefy and adds a nice heavy feel to the host. Also, "Flaminpyro's Junk" was a funny easter egg to see on the battery contact board. This build exceeded my expectations.

As an addendum: You definitely need to wear safety goggles at all times when batteries are installed in something like this. It's not negotiable. I saw in another thread somebody posted a video of a goofy Portugese guy with blue hair shining a blue laser everywhere with no regard for safety, all the while laughing maniacally. It was possibly the worst behavior around lasers I've ever seen. Even those low quality Chinese blue lasers are extremely dangerous and the safety goggles that come with them WILL NOT cut it if you are trying to use your laser to burn things. If you don't have safety goggles, spend the $50 and get the Eagle Pairs, it is beyond worth it.
 

Attachments




paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
17,237
Points
113
If you use this in a well lit room it won't look that bright to your eyes. Looks good. Congratulations.
 

Lifetime17

Well-known member
LPF Site Supporter
Joined
Dec 15, 2014
Messages
5,839
Points
113
Hi,Thats great news and the awesome post, CU is the #1 in heat sinking, AL with a CU core pressed in is good also.
You did a great job and a gold star for safety glasses (good ones). You cant skimp on safety, its a recipe for disaster.
Great choice on the PLTB450B diode they are very durable .
Enjoy Rich:)
 

trephanation

Member
Joined
Jan 12, 2020
Messages
61
Points
18
So as an update, here's a pic of the expanded spot when it's acting normal. However, since last night the spot has been distorted like the second pic, and when focused to infinity (third pic) has some crazy splashing that wasn't there before. This leads me to believe that unfortunately there is something wrong with the diode, such as a crack or scratch in the window. Haven't dropped it or messed with it in any way. Anybody have any thoughts on what it could be?

Edit: Well I've let it sit for a little bit and now the output is very dim/LED-like. I guess the debris/glass may have damaged the diode components inside. Kind of frustrating but I don't bind rebuilding it, as it's a bit cheaper without having to order a whole new lens set.
 

Attachments

Last edited:

GSS

Well-known member
Joined
Apr 28, 2015
Messages
4,986
Points
113
Frustrating for sure but between Dtr and Rich the issue will be fixed within reason, that i'm sure
;)
Did you buy the G2 lens with Dtr's module? or from China? I'm just curious..
 

trephanation

Member
Joined
Jan 12, 2020
Messages
61
Points
18
Frustrating for sure but between Dtr and Rich the issue will be fixed within reason, that i'm sure
;)
Did you buy the G2 lens with Dtr's module? or from China? I'm just curious..
I've got the G2 lens from DTR.

For reference here's that LED-like output. Not so great but if it was thudded somewhere accidentally that's definitely what caused it.
 

Attachments

GSS

Well-known member
Joined
Apr 28, 2015
Messages
4,986
Points
113
You might as well try and take a pic of the diode and post it so we can see.
 

trephanation

Member
Joined
Jan 12, 2020
Messages
61
Points
18
Here you go, I'm not sure how much help it will be as I don't have the tools to remove the diode from the module as well as the crappy picture quality:
 

Attachments

GSS

Well-known member
Joined
Apr 28, 2015
Messages
4,986
Points
113
The pic isn't that bad as far as I can tell I don't see the glass window?
Don't let this one bad PLBT450B diode think twice about it, mine has been going for 5 years..
Suggestions will come..
 




Top