awlego
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- Oct 9, 2009
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So today I was playing with my 2 mirror spirograph using both a single green module (unknown power est. 50mW) and my adjustable RGV when I noticed something odd. When I used the spirograph to make shapes with the laser, not only did the design change, but the color appeared to change too. Compared to a normal dot of the same 532nm green DPSS, the shape made with the dot was much more yellow. Not completely yellow, but enough to notice with the naked eye. Then I tried using other green lasers of similar brightness to the shape being generated by the 50mW green and indeed the shape appeared more yellow than the single dot of green.
Anyone else ever experience this? Can anyone explain why it appears to be more yellow when spinning?
I know they are all EXACTLY 532nm and temperature/diode can't be a factor because they are DPSS. So differences between the lasers cannot be a factor. Nor is power a factor since I tested the same laser with and without spinning as well as 2 lasers next to each other with matched perceived brightness. My only idea is that somehow because the dot is moving along a white wall very quickly some of the white wall comes out and my brain interprets the two as a more yellowish color since it is moving so quickly, where as the single dot is there all the time and I can't see the wall behind it...
I'm just throwing ideas out :can:
-Awlego
Anyone else ever experience this? Can anyone explain why it appears to be more yellow when spinning?
I know they are all EXACTLY 532nm and temperature/diode can't be a factor because they are DPSS. So differences between the lasers cannot be a factor. Nor is power a factor since I tested the same laser with and without spinning as well as 2 lasers next to each other with matched perceived brightness. My only idea is that somehow because the dot is moving along a white wall very quickly some of the white wall comes out and my brain interprets the two as a more yellowish color since it is moving so quickly, where as the single dot is there all the time and I can't see the wall behind it...
I'm just throwing ideas out :can:
-Awlego