White, Ultra Bright LED recommendtaions??

Darren Nemeth · 9th June 2006, 05:59 AM

I am attempting to build my own Hight Definition telecine.

A telecine is a machine wher you can transfer motion picture film to video.

One of the problems I am having is illuminating the film.

The machine I am going to run the film on is lit with an incandescent bulb and the results can be seen in the attached image.

I need to substitute this bulb with an array or ultra bright white LEDs but do not know where to start looking.

Can anyone help?

What are the most reilable, highest quality? Where can I get them?

Thank you in advance.

argofanatic · 9th June 2006, 11:14 AM

Luxeon

macboy · 9th June 2006, 03:29 PM

Are you using a diffuser of any kind? It doesn't look like it.

Darren Nemeth · 9th June 2006, 04:08 PM

I am also at a lost of what type of material I can use as an effective diffuser.

Can you suggest some?

If I can diffuse the light effectively I will not need expensive LEDs.

lgreen · 9th June 2006, 04:54 PM

I'm kind of an idiot, but for a light diffuser i've used the frosted end of a microscope slide. works pretty good; cheap to try if you are just experimenting but you might want something a little more high tec.

cowcrusher · 12th June 2006, 01:29 PM

ive found these new led's that put out, 285 lm. which is way higher than ive ever seen.

bout 150 lumines on this one
http://osram.com/products/led-systems/dragontape.html

this is the brighter one
http://osram.com/products/led-systems/dragonpuck.html

jc2 · 12th June 2006, 02:04 PM

Well you will want a reasonably uniform output over the entire frame, so depending on the distance to the slide and the slide dimensions you can figure out the light angle pretty easy. Many high brightness LEDs get their high numbers by having a narrow pattern.
I would think that the luxeon LEDs that were mentioned earlier would be plenty bright and depending on the model they can have a very wide pattern. Another benefit is that they offer a "warm white" color that might make the image a little more appealing over the normal white LED light

TwoSpoons · 14th June 2006, 11:09 PM

Try Lamina LED arrays .
We had one of the little RGB ones to play with - couldn't look at it!

An RGB array would let you fine tune the color balance. And they're available from Digikey at a reasonable price.

I've seen Osrams Dragons too - they're astonishingly bright. Sadly the rep wouldn't give us a sample

Diffusers: ground glass, opal acrylic, glass beads mixed with epoxy (this one is used in diffused LEDs), holographic diffuser film ($$), tracing paper ...

9th June 2006, 11:14 AM	#2
argofanatic diyAudio Member Join Date: Jul 2005 Location: Quebec, Canada	Here's the best that I have found. Luxeon

9th June 2006, 04:08 PM	#4
Darren Nemeth diyAudio Member Join Date: Jan 2005 Location: Michigan	I am also at a lost of what type of material I can use as an effective diffuser. Can you suggest some? If I can diffuse the light effectively I will not need expensive LEDs. __________________ Darren

9th June 2006, 04:54 PM	#5
lgreen diyAudio Member Join Date: May 2003 Location: San Diego, USA	slide? I'm kind of an idiot, but for a light diffuser i've used the frosted end of a microscope slide. works pretty good; cheap to try if you are just experimenting but you might want something a little more high tec. __________________ My DIY audio projects- PartTimeProjects.com.

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9th June 2006, 03:29 PM	#3
macboy diyAudio Member Join Date: Oct 2003 Location: Ottawa, Canada	Are you using a diffuser of any kind? It doesn't look like it.

12th June 2006, 01:29 PM	#6
cowcrusher diyAudio Member Join Date: Jun 2006	ive found these new led's that put out, 285 lm. which is way higher than ive ever seen. bout 150 lumines on this one http://osram.com/products/led-systems/dragontape.html this is the brighter one http://osram.com/products/led-systems/dragonpuck.html

12th June 2006, 02:04 PM	#7
jc2 diyAudio Member Join Date: Dec 2001 Location: Atlanta, Georgia	Well you will want a reasonably uniform output over the entire frame, so depending on the distance to the slide and the slide dimensions you can figure out the light angle pretty easy. Many high brightness LEDs get their high numbers by having a narrow pattern. I would think that the luxeon LEDs that were mentioned earlier would be plenty bright and depending on the model they can have a very wide pattern. Another benefit is that they offer a "warm white" color that might make the image a little more appealing over the normal white LED light

14th June 2006, 11:09 PM	#8
TwoSpoons diyAudio Member Join Date: Oct 2004	Try Lamina LED arrays . We had one of the little RGB ones to play with - couldn't look at it! An RGB array would let you fine tune the color balance. And they're available from Digikey at a reasonable price. I've seen Osrams Dragons too - they're astonishingly bright. Sadly the rep wouldn't give us a sample Diffusers: ground glass, opal acrylic, glass beads mixed with epoxy (this one is used in diffused LEDs), holographic diffuser film ($$), tracing paper ...

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