Abstract
An experimental investigation of the optical transmission characteristics of an electroformed copper wire mesh at an angle of 45° to incident radiation at 118.8 μm is reported. It is shown that the transmission coefficient is highly sensitive to the input beam polarization and the results obtained are in good agreement with those reported elsewhere. A comparison, however, with previously reported results for a mesh of the same type shows that microscopic differences in the physical dimensions of the mesh give rise to sizeable differences in the magnitude of the transmission coefficient, which is an important consideration in the design of multi-mesh beam-splitting systems when precise beam splitting ratios are required.
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