This article describes how the far-field radiation distribution and power varies with the geometrical parameters of immersion lenses made from silicon (n¯=3.4) and chalcogenide glass (n¯=2.4) mated with LEDs (λ=3.4µm) based on indium antimonide (n¯=3.5) and estimates the efficiency of using such devices in miniature optical systems.
© 2012 OSA
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