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



Laser Pointer Store

I thought it was Osram 450...

Nexgen

Active member
Joined
Nov 11, 2016
Messages
311
Points
43
Hello everyone,
Today I powered my Osram 1.6w 450nm diode and was suddenly confused..
It's color was closer to 465, comparing with Spiker 1.6w the difference was very noticeable.
Maybe I got m140 instead of Osram 1.6?
I tried different currents 0.5A, then 1A. Color was same, so I don't think it's overdrive.
I bought diode from techhood.
 

paul1598419

Well-known member
Joined
Sep 20, 2013
Messages
14,411
Points
113
It is very difficult if not impossible to know a laser's wavelength by comparison without use of a spectrometer, or at least a diffraction grating of known rules (lines/mm). With the later you must use some algebra and a scientific calculator to make it easier. All people's vision in this respect differs from individual to individual.
 

Nexgen

Active member
Joined
Nov 11, 2016
Messages
311
Points
43
It is very difficult if not impossible to know a laser's wavelength by comparison without use of a spectrometer, or at least a diffraction grating of known rules (lines/mm). With the later you must use some algebra and a scientific calculator to make it easier. All people's vision in this respect differs from individual to individual.
I have diffraction grating, but I don't know how to measure wavelength with it. :thinking:
 

aaronnoraa

Member
Joined
Jun 20, 2015
Messages
95
Points
18
Hello everyone,
Today I powered my Osram 1.6w 450nm diode and was suddenly confused..
It's color was closer to 465, comparing with Spiker 1.6w the difference was very noticeable.
Maybe I got m140 instead of Osram 1.6?
I tried different currents 0.5A, then 1A. Color was same, so I don't think it's overdrive.
I bought diode from techhood.
Output wavelength varies from diode to diode for the same model.. you just may have a high wavelength diode. Usually people prefer a higher wavelength blue, hopefully you do too :)

If anything an m140 should be lower in wavelength than a typical Osram 1.6 since the m140 is spec'd at a typical 445nm.
 

dden4012

New member
Joined
May 30, 2016
Messages
1,002
Points
0
If anything an m140 should be lower in wavelength than a typical Osram 1.6 since the m140 is spec'd at a typical 445nm.
That's what I was thinking just didn't want to step in it. The M140 has been very consistent for me even through the versions. Same with the 450. Might just be some mix up. IDK.
 




Top