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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

Ï„ 1

Ï„ 2

r

y T

c

θ max

Gaussian, small 2nd segment

LED16

0.20Ï€

0.25Ï€

0.1630

0.3862

5,585.9

11.25Ï€

Gaussian, large 2nd segment

LED16

0.16Ï€

0.30Ï€

0.4417

0.3862

5,585.9

11.25Ï€

Block profile

LED02

0.20Ï€

0.25Ï€

0.1612

0.3986

4,843.3

9Ï€