Fuse lenses

The MTF is measured by, for example, recording a line grid with the camera. The brightness distribution of such a grid corresponds to a sinusoidal curve. The width of the line pattern (line pairs per millimeter – Lp/mm) describes the so-called spatial frequency. The MTF is a function dependent on the spatial frequency, which is defined as the ratio between the amplitude of the sinusoidal curve on the image, and the original sinusoidal curve. The value is always between 1 (optimal transmission) and 0. In contrast to an optical camera, infrared cameras measure thermal contrast. This is called SRF (Slit Response Function).

By popular demand, you can order brown lenses almost black with 90% of darkness (select Ultra). NB! Ultra Brown lenses are very dark indoors!

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Since the SRF also depends on where the measurement is taken within the image section, in the Final Inspection Report for its Precision Line infrared cameras Optris states the values for the center of the image as well as for all four corners. The spatial frequency is 9.8 Lp/mm.

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The Modulation Transfer Function (MTF) describes how well a camera can represent the detail contrast of an object in the image.

Our experienced application engineers ensure competent and reliable customer service in the field. In addition, Optris works closely with numerous distribution partners worldwide.

Our lenses DIA (diameter) is 14.2mm and you can select bigger colored area (iris size, default 11.5mm) and add a prescription if needed. Manufacturing time ca 3-6 weeks.