However, TLP or SCPC has some disadvantages the primary one been insufficient compactness induced by the working length of TLP or SCPC for the illumination system. To overcome this problem, one can use TIR or Total Internal Reflection lenses.
Definition of TIR lens TIR or Total Internal Reflection lenses are cone-like lenses that usually have rotationally symmetrical designs to distribute light in a rounded pattern. You can use TIR lens to collimated light or to generate a preferred uniform illumination.
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