3-4 degree round beam with no overspill

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rolfknudsen
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3-4 degree round beam with no overspill

Hello

New to this forum and need help creating a lamp based on flashlight tech / your knowledge with lenses and LED combinations.

We have a lighting design that requires a tight, round beam, with no overspill, 3-4° region, 90 CRI up.
The distance of travel is for the new design based on a previous design of ours 70cm hitting a 50mm convex mirror. and then 70-100cm to a surface, so we are not talking your usual 1 mile throw here.
This is how our first design looks like to give you an idea:

I have of course looked to source within the traditional lighting industri as well as show lighting, but our application seems to fall between the two.

Given how much specialist knowledge, modding and prototype/one off design there is amongst you on this forum I am hoping you can advice my of a solution?
Perhaps even an off the shelve product that I can run tests with?

Visually an Aspheric lens would be very good, but beam quality and tightness is of course all important.

Thank you,

Rolf

JaredM
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I take it efficiency isn’t much of a concern?

It seems like a small die emitter (Nichia E17A?) under a small aspheric is what you want. Additionally, an aperture after the optic can further shape and tune the beam in addition to eliminating periphery aberrations.

https://fundrazr.com/osturaband

No affiliation, just a fan.

Lumen9000
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Change the Led for a blue laser, and cover the mirror in fosfor..
Or use a lens to focus the led at an appropriate distance. Cool idea anyways!

rolfknudsen
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Thank you!

Very speedy replies….

Both very good suggestions – the Nichia E17A / small aspheric lens I can test straight away as I have those components here.

Really like this forum and the ‘under the hood’ knowledge.

Thanks!

djozz
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Hi Rolf,

That looks like a very nice design. What is the led and optics in your first design? And how much light must the lamp emit?

rolfknudsen
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Hi

It was a small of thee shelve unit run @ 700mA, with a 10° optic.
This had overspill.

Without being scientific I believe 200-300lm is sufficient.