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Table 2 Parameter values and characteristics for the three different collimators

From: An inverse method for color uniformity in white LED spotlights

Collimator LED τ 1 τ 2 r y T c θ max
Gaussian, small 2nd segment LED16 0.20π 0.25π 0.1630 0.3862 5,585.9 11.25π
Gaussian, large 2nd segment LED16 0.16π 0.30π 0.4417 0.3862 5,585.9 11.25π
Block profile LED02 0.20π 0.25π 0.1612 0.3986 4,843.3 9π
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