Re: For people who have FAITH in Michael & can talk about his work & offer our suppor
i was thinking 3 sets of optics on top of each other in one reflector to increase the throw.
That's not how aspherics work. They aren't nozzles that focus light, they are optics that create images. Set your aspheric light to correct focus and turn it off. Look into the lens and you will see a yellow blob filling most of the lens. This is an image of the (center of the) LED being projected. When the LED is lit, its light projects as an image of itself, which is the most-focused that its light can be. Use of other optics can invert or stretch the image, but it can't be feasibly made smaller. In fact, the highest lux possible would be with a very large fresnel lens a few meters away from an LED. When focused, this will project a much narrower beam (with many fewer lumens) than any small light. One way to imagine this is that the ratio of apparent LED size at the optic, to the size of the optic, leads to throw. This is not precisely correct but works well enough. A small LED farther away can be focused to a smaller point.
The take-home lesson here is that as shown in the third sentence here, any 'pre-optic' increases the apparent size of the LED. A pre-optic in the main light path increases output and decreases intensity. There is no free lunch, and no way to make infinitely-narrow beams of light. In general, the greater the focal distance of the aspheric, the smaller the dispersion angle of the LED image would be (And the higher the lux at a given range). But the greater the focal distance, the less output and/or the bigger the lens would need to be.
