![]() ![]() ![]() I'm trying hard to understand this, sorry if I'm slow. Maybe if I understood the "reflector size divided by distance" method I would. I still don't understand how to calculate the distance to and size of the beam waist. Is there a threshold between the two methods, say, if distance is 5x the reflector diameter? Is that degrees, radians? Do you take the arctan of that? Is it a divergent or convergent angle? Is it the half angle or whole angle? ![]() I don't understand how to calculate the angles just from "reflector size divided by distance". It seems a 1 mm source in a 1 meter reflector would produce different beam angles than a 1 mm source in a 1 cm reflector, even if spot size was large compared to reflector size for both cases (i.e, longer distances). The equation doesn't consider reflector size, only source size and distance to target. I've studied the equation you posted, along with "the angles are given by reflector size divided by distance", and there are several things I don't understand: ![]()
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