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Re: Review of the Directly-Injected 505nm Bluish-Green Laser Pen
I performed the spectroscopy at least a full day after the battery test; the LD would have most certainly been at room temperature by then.
So this spectrographic analysis shows a PERMANENT wavelength drift; not a temporary thermally-induced one where the LD would still be hot and a wavelength shift would be fully expected.
So it shifted down about 2 nm after 3 hours of operation. I'm not sure about any points in between, but i'd guess that it shifts down most within the first 10-20 minutes or so and then thermal equilibrium is reached...
I performed the spectroscopy at least a full day after the battery test; the LD would have most certainly been at room temperature by then.
So this spectrographic analysis shows a PERMANENT wavelength drift; not a temporary thermally-induced one where the LD would still be hot and a wavelength shift would be fully expected.