MKS Instruments has developed a motorised infrared zoom lens optimised for the new generation of 10 μm pixel SXGA/HD FPA (focal plane array) and 15 μmVGA FPA detectors (writes Nick Flaherty).

The LightIR 18-225 mm MWIR f/4 lens takes advantage of the smaller pixels to reduce the size of the optical elements. That significantly decreases the length and weight of the lens to 84 mm long,61.4 mm in diameter and 326 g, making it 19% smaller than similar lenses.

The optics are designed to operate near the diffraction limit of the sensors at wavelengths of 3.4 to 4.9 μm and maintain focus throughout the entire zoom range.

“The lens addresses the new market shift toward smaller pixel-size detectors,” said Dr Kobi Lasri, general manager, Ophir Optics Group. “It combines low-SWaP capabilities and a detection range of more than 16 km. That makes it an enabler for advanced UAV and small gimbal thermal imaging applications.”

The lens is powered by a 6-12 VDC line with a peak current of 1.0 A. An RS-422 interface is used to connect to most gimbals and camera systems.