Zinc Sulfide Thermal Imaging Lenses
This is not manufactured by the traditional method of vapour deposition (CVD) which is expensive and slow, but a precise sintering and moulding forming process utilising powdered material in a heated press. This process provides a perfect lens shape every time. Material, time and labour are reduced and the resulting lenses are all around the F# 1.1 aperture providing high quality thermal imaging. The ZnS lens has excellent characteristics such as high-purity FIR transmission from 8 to 12μm in wavelength, optical surface roughness of less than 0.020 μm on average and profile errors within 3 μm. In addition, a ZnS lens of this type has remarkable modulation transfer function (MTF) performance to make images clearer in detail.
ZnS lenses provide a cost effective alternative to germanium whilst providing high quality thermal video and pictures
Premier Electronics Ltd
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