| http://www.w3.org/ns/prov#value | - In an alternate form of the invention, particularly adapted for LED's in which optical radiation intensity is related to angle by the relationship between the radiation intensity and angle is substantial gaussian (i.e. proportional to e-k(angle).spsp.2, where k is a constant), the microprocessor determines the coordinates X and Y as follows: ##EQU2## Thus, in the latter form, X and Y are linear fu
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