How does a pyroelectric detector work?
Pyroelectric detectors are thermal detectors: Temperature fluctuations produce a charge change on the surface of pyroelectric crystals, which produces a corresponding electrical signal. The pyroelectric coefficient determines the ability to produce current from IR radiation. That is to say: the bigger, the better.
What are pyroelectric detectors?
A Pyroelectric detector is an infrared sensitive optoelectronic component which are specifically used for detecting electromagnetic radiation in a wavelength range from 2 to 14 µm. A receiver chip of a pyroelectric infrared detector manufactured by InfraTec consists of single-crystalline lithium tantalate.
Which is the most common material used in pyroelectric infrared detector?
Operational Principles of Pyroelectric IR Detectors
| Material | p ( μ C m − 2 K − 1 ) | F v ( m 2 C − 1 ) |
|---|---|---|
| PZT 15/85, (111) polycrystalline thin film on silicon (MEMS) | 160–220 | 0.03–0.04 |
| PbLaTiO3, 10–20% La polycrystalline thin film on silicon | 200–576 | 0.02–0.15 |
| PbTiO3, (001) thin-film epitaxy on Pt/MgO | 250 | 0.09 |
What do IR sensors detect?
An infrared sensor is an electronic instrument that is used to sense certain characteristics of its surroundings. It does this by either emitting or detecting infrared radiation. Infrared sensors are also capable of measuring the heat being emitted by an object and detecting motion.
What kind of sensor is a pyroelectric detector?
A Pyroelectric detector is an infrared sensitive optoelectronic component which are specifically used for detecting electromagnetic radiation in a wavelength range from (2 to 14) µm. A receiver chip of a pyroelectric infrared detector manufactured by InfraTec consists of single-crystalline lithium tantalate.
What kind of tantalate is used in pyroelectric detectors?
A receiver chip of a pyroelectric infrared detector manufactured by InfraTec consists of single-crystalline lithium tantalate. Because of its very high curie temperature of 620 °C lithium tantalate guarantees an extremely low temperature coefficient with an excellent long-term stability of the signal voltage.
What kind of pyroelectric sensor is excelitas?
With Pyroelectrics available in Single-, Dual- and Quad-Element configurations we offer you a wider range of different sized infrared sensor surfaces, which directly translates to enhanced performance and sensitivity. Excelitas sensors are representing the innovative forefront in mid-IR sensor devices.
How are Pyro detectors used in consumer products?
PZT is primarily used in consumer products. The IR crystal is modulated as a power source with a parallel capacitance and housed in a TO can with additional electronic components. There are two basic modes of operation of pyro detectors: voltage mode (VM) (Fig. 2) and current mode (CM) (Fig. 3).
