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



Laser Pointer Store

Sharp 490nm Build

Mosc007

Active member
Joined
Feb 2, 2012
Messages
527
Likes
150
Points
43
It has been a while since I received a new diode to add to my collection.

The Sharp GH04850B2G 490nm

Wow, What an absolutely superb color from this diode. I love it. It's a DTR 12mm Copper module with a 2 Element Glass lens mounted in an S4 Host from Survival Lasers.

Output power meters at 66mw. G2 lens would be higher output but I don't like the artifacts with a G2 lens.

The Image doesn't do it justice. The color is amazing. Just like my Argon.
 

Attachments


BowtieGuy

Well-known member
LPF Site Supporter
Joined
Oct 14, 2012
Messages
5,399
Likes
1,899
Points
113
^^^^^ Agreed ^^^^^ Looks good, but more photos are always better, especially with these beautiful wavelengths! :yh:
 
Last edited:

Mosc007

Active member
Joined
Feb 2, 2012
Messages
527
Likes
150
Points
43
Fair comment. As usual I rushed it. I should assemble them at a better time of day instead of around midnight after I get home from work.

I will try and do some better beamshots later.

It is a very quick build though. Nothing special and takes about 10 mins to assemble. Not realy worth showing the assembly pics.
 

Lifetime17

Well-known member
LPF Site Supporter
Joined
Dec 15, 2014
Messages
4,677
Likes
1,344
Points
113
Hi
Great build those S4’s are a great asset and easy to build. Awesome WL also

Rich:)
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,866
Likes
1,997
Points
113
I love these new 490nm diodes too. I have had the pleasure of measuring about 30 of them so far and there is enough range in these diodes to get a completely blue or a blue/green laser light out of them. I do enjoy beam shots, though. I think that is what everyone is asking for more of. I'm out of reps at the moment, but will give you one once that lets up.
 

Mosc007

Active member
Joined
Feb 2, 2012
Messages
527
Likes
150
Points
43
I prob won't be able to do more beam shots until the weekend.

But here is an out of Focus Shot shining thru a piece of A4 white paper. It does a good job showing the beam profile and the color looks pretty close to what my Eye's see.
 

Attachments

Mosc007

Active member
Joined
Feb 2, 2012
Messages
527
Likes
150
Points
43
I have not powered up my Argon and calibrated my Spectrometer accurately so there is some error.

I am looking at using a Mercury Vapor lamp at work to calibrate it next week.


Anyway, A quick check with this Diode gives me a reading of 487nm. I doubt that is accurate though. I have only done calibration using my HeNe and a few Diode lasers so maybe up to a 5nm error.
 

Attachments

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
13,866
Likes
1,997
Points
113
You can likely get by using your 473nm, 532nm, 632.8nm and a fluorescent light. That should get you in a ball park, anyway. Ne is good for the upper end of the spectrum on these B&W ones, but you will need sources down to 400nm to get the low end.
 




Top