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Materials to reduce the blue color components in LED lighting?


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#1 Kelvin Xu

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Posted 24 August 2015 - 04:35 AM

What are the materials, for example transparent films, or liquid, to absorb and reduce energy of the blue components in LED light outputs, especially the lower wavelength portion? Where can I buy small samples of that for color manipulation experiments?

 

I noticed the spectrum of LED lights tend to have a trough between blue and green. Are there any techniques to make the spectrum of LED lights more continuous? 

 

Let's assume the color accuracy is not in important. 
 

 

Practically all LEDs have a spectrum that's heavy in blue, lacking in green-turquoise, and lacking in the really deep red, but they're gett

 

Thank you! 

 


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#2 Phil Rhodes

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Posted 24 August 2015 - 04:40 AM

What are the materials, for example transparent films, or liquid, to absorb and reduce energy of the blue components in LED light output

 

Lee Filters Zircon range.

 

Also, colour-correction filters not specifically intended for LED may still be useful.

 

I noticed the spectrum of LED lights tend to have a trough between blue and green. Are there any techniques to make the spectrum of LED lights more continuous?

 

Not really. Filtration naturally can't put back what isn't there. Remote phosphor LEDs, such as the type you mentioned in your other thread, are better. Some designs have included LEDs of different colours in an attempt to fill in holes in the spectrum, but that tends to create as spiky spectrum. Which is better depends on your application.

 

Don't overlook other technologies such as high-intensity discharge and fluorescent, both of which can have similar efficiency to LED and better spectral characteristics (though this is changing). If you want really consistent spectral characteristics, sadly, there's only one place to go:

 

26_2049425i.jpg

 

 

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Media Blackout - Custom Cables and AKS

CineTape

Ritter Battery

Gamma Ray Digital Inc

New Pro Video - New and Used Equipment

Paralinx LLC

Visual Products

FJS International, LLC

Technodolly

Broadcast Solutions Inc

Tai Audio

Abel Cine

Aerial Filmworks

Rig Wheels Passport

The Slider

Glidecam

rebotnix Technologies

Metropolis Post

Willys Widgets

CineLab

Wooden Camera