davidgdg
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I just fired up my 473 labby (65mw) to compare the output with my 445 custom daguin (570mw).
I tried taking some pix, but the colours and brightness are not captured at all. All I get is bright white blobs. So old-fashioned words will have to do.
Three things struck me:
1. The colours are remarkably close. I had expected that the 445 would be more inky-indigo and that the 473 would be more of a sky blue, but honestly it is hard to see much difference. Both are a brilliant medium blue. The main difference is that the 445 induces more fluorescence so that it tends to have a violet haze around the main blue spot. But this depends on the surface and is not always present. Without knowing which was which, it would be hard to tell the difference from the spot colour alone.
Verdict: A draw
2. The difference in brightness was much less than might be expected, given a 10 fold power difference. Some of this is attributable to the increased sensitity of the eye to the longer wavelength (about 3 fold - so that 65mw of 473 would supposedly appear equal in brightness to ~ 200 mw of 445). But I think it also reflects the fact that the eye's perception of brightness is logarithmic. These things are very subjective, but I would say that the 445 appeared perhaps twice as bright as the 473, but no more.
Verdict: 445 wins, but a closer result than you might think from the raw numbers
3. The spot from the 473 is much more of a starry point. This of course is because of the DPSS as opposd to bar diode output. Aesthetically the 473 is much more pleasing to the eye.
Verdict: Easy win for the 473
Conclusion: Get both if you can ;-)
David
I tried taking some pix, but the colours and brightness are not captured at all. All I get is bright white blobs. So old-fashioned words will have to do.
Three things struck me:
1. The colours are remarkably close. I had expected that the 445 would be more inky-indigo and that the 473 would be more of a sky blue, but honestly it is hard to see much difference. Both are a brilliant medium blue. The main difference is that the 445 induces more fluorescence so that it tends to have a violet haze around the main blue spot. But this depends on the surface and is not always present. Without knowing which was which, it would be hard to tell the difference from the spot colour alone.
Verdict: A draw
2. The difference in brightness was much less than might be expected, given a 10 fold power difference. Some of this is attributable to the increased sensitity of the eye to the longer wavelength (about 3 fold - so that 65mw of 473 would supposedly appear equal in brightness to ~ 200 mw of 445). But I think it also reflects the fact that the eye's perception of brightness is logarithmic. These things are very subjective, but I would say that the 445 appeared perhaps twice as bright as the 473, but no more.
Verdict: 445 wins, but a closer result than you might think from the raw numbers
3. The spot from the 473 is much more of a starry point. This of course is because of the DPSS as opposd to bar diode output. Aesthetically the 473 is much more pleasing to the eye.
Verdict: Easy win for the 473
Conclusion: Get both if you can ;-)
David
) above a dark (preferably black) surface. You don't need to photograph 3 meters-worth of beam, just the first 5~20cm emanating from the aperture. I placed my (real) camera tripod more or less above the lasers, so as to photgraph the beams (almost) at right-angles.
what's Glenn's take? Better yet, let me check the CNI GB threads so as not to derail this thread.
