is visible to us has a wavelength in the range of 380 nanometres to 780 nanometres. The short-wave, blue components of light are richer in energy than the red components and are refracted more strongly on [...] used here guarantees bright, even illumination over a long period of time. If required, the white/blue light can be toned down by using a filter cap. What is an aspheric lens? An aspheric lens has a refractive
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