Ocelot
Newly Enlightened
Hi All,
I am interested in finding a particular lens for use with Luxeon STAR leds.
I have purchased a number of 5W Luxeons (Lambertian) and have made some headlights out of them.
When it came to lenses, the first place I bought lenses from (the smaller ones) seemed to have a poor radiation pattern. The lens was the one which Lumileds sells.
I talked with a guy from Future Electronics abuot it and he said that was because the lens was for a low dome emitter, and that Lumileds didn't have one for Lambertian emitters.
I then bought some of the Fraen lenses: The small (19mm) narrow and medium, and the larger (27mm) narrow and medium.
All seem to work pretty well except the 27mm narrow; it has a pretty nasty hole in the middle of the pattern. If I remove the lens from the housing and reposition, it looks better.
Anyway, my main question. I also scavenged a 19mm lens from an original 1W Luxeon Star/O and tried it with the 5W lambertian. The patter is square (from the fact that there are 4 substrates in the 5W LED), but the square is quite bright and is actually a very nice beam. It's obvious that the lenses which are available in the Star/O devices is different than all the others.
Does anyone know where I can get any of these lenses?
Thanks,
Scott
I am interested in finding a particular lens for use with Luxeon STAR leds.
I have purchased a number of 5W Luxeons (Lambertian) and have made some headlights out of them.
When it came to lenses, the first place I bought lenses from (the smaller ones) seemed to have a poor radiation pattern. The lens was the one which Lumileds sells.
I talked with a guy from Future Electronics abuot it and he said that was because the lens was for a low dome emitter, and that Lumileds didn't have one for Lambertian emitters.
I then bought some of the Fraen lenses: The small (19mm) narrow and medium, and the larger (27mm) narrow and medium.
All seem to work pretty well except the 27mm narrow; it has a pretty nasty hole in the middle of the pattern. If I remove the lens from the housing and reposition, it looks better.
Anyway, my main question. I also scavenged a 19mm lens from an original 1W Luxeon Star/O and tried it with the 5W lambertian. The patter is square (from the fact that there are 4 substrates in the 5W LED), but the square is quite bright and is actually a very nice beam. It's obvious that the lenses which are available in the Star/O devices is different than all the others.
Does anyone know where I can get any of these lenses?
Thanks,
Scott