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



200mW 375nm UV Build

Giannis_TDM

Well-known member
Joined
Apr 27, 2019
Messages
547
Points
63
I'd be interested but don't trust you or anyone anonymous on this forum lol

Can you make a ebay link
IMG_20210115_213928.jpg
Don't worry Philip is who he says he is, He's the guy whom I bought my HeNe from. Communications were swift and it was packed, unlike anything I've seen before. It was exactly as advertised and in top condition.
To give you an idea, I made this DIY stand with some packing material he had on the bottom of the box. Everything was bubble wrapped with packed air on top.
 



CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,082
Points
113
Phillip, do you have your own thread on here. If not, it may be in your favour to have on like Podo does for Sanwu.
 

Phillip

Member
Joined
Nov 11, 2007
Messages
62
Points
8
Hi! I´m from Austria, so another time...
I need to minimum order 4 diodes to get this price!
BR
 

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
7,082
Points
113
So a group buy may be necessary if some want to get hold of these diodes.
 

Phillip

Member
Joined
Nov 11, 2007
Messages
62
Points
8
There are not much avaiable anymore up to round about Oct. 2021.
Now please discuss on my new thread.
BR,
Phillip
 

kecked

Active member
Joined
Jun 18, 2012
Messages
604
Points
43
How much less visible is 375 than 405. I do not mean when downshifted just to the eye direct on a non active surface? Thinking of glow n the dark. Would it be less apparent as you draw with it. 405 has a visible dot of purple.
 

Encap

Well-known member
Joined
May 14, 2011
Messages
5,932
Points
113
How much less visible is 375 than 405. I do not mean when downshifted just to the eye direct on a non active surface? Thinking of glow n the dark. Would it be less apparent as you draw with it. 405 has a visible dot of purple.
According to the relative brightness calculator 405nm is 12X brighter than 375nm https://slickscreen.github.io/laser-tools/brightness/

OP says in post # 1 "The color is not what I expected it to be, having a 355nm to compare to. I expected this to be a dim blue-ish gray, but it was actually a dim violet. If you pointed it at a wall and called it a true 5mW 405nm, I would believe you until I saw the rest of the room glowing."

Curtis Oliver noted in post #2 "Based on your description I can get a very good feel of what a 375nm laser is like. The halo and blurring, and the dim violet. All things I expected at this part of the spectrum. 375nm is the same wavelength that most common uv torches come in"

Gives an idea of visibility at least.
 

ZRaffleticket

Well-known member
Joined
Feb 4, 2010
Messages
3,091
Points
113
50mW of 405 is far brighter purple than 200mW 375nm.

Brightness wise it's better off described as material fluorescence + a dim purple halo. There are a lot more active surfaces than you'd expect... on a non active, non reflective surface, 200mW 375nm is about 1/10 as bright as 50mW 405nm.
 

ZRaffleticket

Well-known member
Joined
Feb 4, 2010
Messages
3,091
Points
113
Double post; update with LPM results

Micro flex drive set to 380mA

LensPower Output (380mA)Size (33 feet)Notes
AcrylicN/AN/ALens melted.
3 Element161mW3/4 InchesMarginal loss in power, evident in brightness. Surprisingly not the best beam shape either.
G2258mW1 1/4 InchesHighest output power, evident in brightness. As expected, worst beam shape.
G3228mW5/8 InchesMy preference because of the close focal length; can keep focus adapter flush with host.
G8243mW5/8 InchesPretty good. Far focal length, not my preference for making handhelds look nice.
 

kecked

Active member
Joined
Jun 18, 2012
Messages
604
Points
43
I was hoping for totally invisible Except for fluorescenc. I guess against strontium aluminate you would not see it.
 

ZRaffleticket

Well-known member
Joined
Feb 4, 2010
Messages
3,091
Points
113
There's a slight hint of violet left but you need to be looking for it to really notice, same for other GITD materials. The color mostly gets washed out on any sort of active material.
 




Top