LazyBeam
0
- Joined
- Jun 12, 2010
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Re: *445nm lasers* !diodes 38.50$!
Flourescence is the absorbing of light energy and subsequent release of adifferent wavelength. Typically, but not always, a more energetic wavelength is absorbed (possibly an invisible wavelength) and a lower energy wavelength is released. Efficiency aside, this is why flourescent materials typically appear very bright - they must emit more light at a lower energy than incident light at high energy to balance out the wavelength conversion. In the real world, flourescent things often have trace phosphorescence because the light conversion is not "instantaneous". ALthough it's so quick humans can't percieve it and might as well be considered instant.
Phosphoresence is the time-delayed release of light. As mentioned before, many things phosphoresce without us recognizing it because it happens so quickly... but material that takes a noticably long time to release asorbed energy as light are especially classified as phosphorescent. The wheel in the projector, while it may or may not have any noticable phosphorescence, certainly is intented to work under the principle of flourescence... take the very high energy wavelengths actively produced and convert them to much "brighter" longer wavelengths.
A few years ago I did quite a bit of research on optical coatings for high altitude and near-orbit vehicles... the idea being that you could take wavelengths of the AM0 spectrum your vehicle might absorb and get the material to throw off that light (energy) in a different wavelength. So your vehicle might emit more light than it can reflect across the whole spectrum thereby increasing the cooling (anti-heating) effect. Up high in the thin atmosphere convection is greatly reduced and you have to rely on the reflectance and emittance of your materials for cooling.
Flourescence is the absorbing of light energy and subsequent release of adifferent wavelength. Typically, but not always, a more energetic wavelength is absorbed (possibly an invisible wavelength) and a lower energy wavelength is released. Efficiency aside, this is why flourescent materials typically appear very bright - they must emit more light at a lower energy than incident light at high energy to balance out the wavelength conversion. In the real world, flourescent things often have trace phosphorescence because the light conversion is not "instantaneous". ALthough it's so quick humans can't percieve it and might as well be considered instant.
Phosphoresence is the time-delayed release of light. As mentioned before, many things phosphoresce without us recognizing it because it happens so quickly... but material that takes a noticably long time to release asorbed energy as light are especially classified as phosphorescent. The wheel in the projector, while it may or may not have any noticable phosphorescence, certainly is intented to work under the principle of flourescence... take the very high energy wavelengths actively produced and convert them to much "brighter" longer wavelengths.
A few years ago I did quite a bit of research on optical coatings for high altitude and near-orbit vehicles... the idea being that you could take wavelengths of the AM0 spectrum your vehicle might absorb and get the material to throw off that light (energy) in a different wavelength. So your vehicle might emit more light than it can reflect across the whole spectrum thereby increasing the cooling (anti-heating) effect. Up high in the thin atmosphere convection is greatly reduced and you have to rely on the reflectance and emittance of your materials for cooling.
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