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ArcticMyst Security by Avery

Laser light "Clean colours"

Joined
Aug 26, 2011
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647
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Ok so something I've been wondering since I got my first 445 is that Blue light looks considerably "Cleaner" than Green and Red etc.

For example when I shine my green onto a light bulb it illuminates the light bulb but the green is very grainy / fuzzy but obviously still bright and clear (there is nothing wrong with my eyes)

And red even more so. (Not brighter ofc)

But blue and below is not, it's just "clean" ?

Why is this?

I hope I translated my thoughts to you well enough to understand.
 
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Joined
Sep 16, 2007
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3,658
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Are you referring to the speckle pattern that the laser light produces when it is diffused?

If so, that is a result of interference.
All lasers do this - including your blue laser. It may not be as noticeable since shorter wavelength light is not as easy to focus on.
Short wavelength blue and violet light does not focus on the retina like longer wavelengths (google "index of refraction," "chromatic abberration," and "myopia") so it can appear blurry or out of focus. Also, the shorter wavelengths can cause a small amount of fluorescence in your eye which complicates perception even further.
 
Last edited:
Joined
Aug 26, 2011
Messages
647
Points
0
Are you referring to the speckle pattern that the laser light produces when it is diffused?

If so, that is a result of interference.
All lasers do this - including your blue laser. It may not be as noticeable since shorter wavelength light is not as easy to focus on.
Short wavelength blue and violet light does not focus on the retina like longer wavelengths (google "index of refraction," "chromatic abberration," and "myopia") so it can appear blurry or out of focus. Also, the shorter wavelengths can cause a small amount of fluorescence in your eye which complicates perception even further.

Ok is that also why 405's dont look like a point from a distance.
 
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