Infrared Detector

The infrared detector (or IR detector) is an optoelectronic component and represents the core element of gas analyzers, flame sensors, devices of spectral analysis, as well as non-contact temperature measurement. In DIN 1319-1, a detector is called a transducer, also known in Europe as a sensor, so that in the literature rather than referred to as an infrared detector, the terms infrared transducer and infrared sensor are often found.

Infrared detector from InfraTec

InfraTec is specialized in the production of pyroelectric infrared detectors without cooling or temperature stabilization in a wide operating temperature range (-55 ... 85) °C, capable of measuring the slightest amounts of infrared radiation (as little as a fraction of a nW) with wavelengths between 1 µm and > 25 µm. These infrared detectors are available in standardized housing types (TO18, TO46, TO5, TO39, TO8).

Advantages of Pyroelectric Detectors by InfraTec

As part of the family of thermal detectors, a pyroelectric detector, unlike semiconductor detectors (InGaAs, PbS, PbSe), are equipped with a highly efficient, absorbent black layer and thus has an extremely broad, spectrally and laterally homogeneous sensitivity. Semiconductor detectors achieve a higher specific detectivity than pyroelectric detectors when operated with up to a wavelength range of 3 µm at room temperature.

Comparison of different infrared detectors

Compared to thermopile detectors, which may also detect long wavelength infrared radiation at room temperature, a pyroelectric detector by InfraTec is much faster and operates with significantly higher signal voltage, even without additional preamplification. Optimal conditions for pyroelectric detectors are at wavelengths between (2.5 and 25) µm and modulation frequencies (0.5 to 400) Hz.

InfraTec pyroelectric infrared detectors use special black layers for absorption and can therefore even be used as large-scale, long-term stable receivers of UV radiation (i.e. 193 nm), but can also be used for THz radiation in the range of 100 µm to 1 mm.

Manufacturing Excellence

All steps in development and production take place in our main building in Dresden, starting with development and simulation to design and prototyping to the volume production of detectors. Technologies are designed with redundancy and produce a complete in-house technological process. PVD, chip and wire bonding and product measurements are automated, what removes the variations of the manual manufacturing. This results in a constant high quality in all fields, even with the most demanding manufacturing and testing processes.

InfraTec pyroelectric infrared detectors use polished double sided LiTaO3 single crystals as a polyelectric material, which due to a specific process, produces very thin (25 µm), highly sensitive, low-noise pyroelectric chips in an automated batch process.