Precision and Power: Engineering LED Systems – Wavelength, Beam Optics and Thermal Management

In short The semiconductor sets the colour. The bandgap fixes the photon energy and so the wavelength: λ [nm] ≈ 1240 / Eg [eV]. Practical LEDs run from the deep UV (about 250–280 nm) to the near-IR (850 and 940 nm are the common IR choices). A bare LED is a Lambertian emitter: I(θ) = […]
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