Old 05-30-2017, 11:10 PM #1
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Question I thought it was Osram 450...

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.


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Old 05-30-2017, 11:49 PM #2
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Default Re: I thought it was Osram 450...

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.
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Old 05-31-2017, 06:07 AM #3
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Default Re: I thought it was Osram 450...

Quote:
Originally Posted by paul1598419 View Post
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.
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Old 05-31-2017, 06:40 AM #4
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Default Re: I thought it was Osram 450...

Here's one of many threads that explain it all to you. http://laserpointerforums.com/f70/ma...1-a-98640.html
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Old 05-31-2017, 07:52 AM #5
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Default Re: I thought it was Osram 450...

Quote:
Originally Posted by Nexgen View Post
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.
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Old 05-31-2017, 09:22 AM #6
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Smile Re: I thought it was Osram 450...

Quote:
Originally Posted by paul1598419 View Post
Here's one of many threads that explain it all to you. http://laserpointerforums.com/f70/ma...1-a-98640.html
Thanks Paul
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Old 06-01-2017, 12:51 AM #7
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Default Re: I thought it was Osram 450...

Quote:
Originally Posted by aaronnoraa View Post
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.
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