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Table 1

Throughput of the 25 mm two-telescope combiner in L band for different input beam diameters.

Beam diameter 8 mm 11 mm 14 mm 16 mm

Left input 20.4% 22.5% 16.6% 13.8%
Right input 24.5% 28.4% 24.1% 21.9%
Average 22.4% 25.4% 20.4% 17.8%

Notes. Absolute accuracy on the order of 2% due to error propagation of imperfect adjusting of the iris.

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