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what is exact voltage an IR led should need to get sharp beam ? Answered

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steveastrouk
steveastrouk

7 years ago

You can't focus them by the applied voltage ! You need lenses, if its critical.

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MDheliMech
MDheliMech

Answer 7 years ago

I would have to agree with this answer. Higher voltage translates into higher brightness or intensity (the light may travel farther). However higher voltage will not effect the width of the beam beyond what the limitations of the existing lens. Once you reach maximum voltage the visual projection of a beam, say on the wall may appear "sharper" but as you move further away from the wall at that same voltage the beam will scatter and appear less sharp. A different lens would be the best way. If you wanted a low budget to make it more uni-directional you could put the LED in a small tube to prevent some of the scatter.

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argha halder
argha halder

7 years ago

you mean infra red leds?if that you will never be able to see the beam because human eyes can not see infra red light.but you may see it in cameras.so to get sharp beam the voltage before the led gets burnt can be given.because the higher the voltage the higher the brightness and sharpness of led light.