DLaTGS Pyroelectric Detectors

19 Mar 2018

Fourier transform infrared spectrophotometry has become a well-established alternative

to dispersive spectrophotometry, using prisms or gratings. An FTIR interferometer splits

one beam of light from a broadband source into two using a beam splitter, transmitting the

first beam to a fixed mirror and the second to a mirror that is translated back and forth very

precisely so that the paths of the two beams are different. The device then recombines the

beams and directs them through the sample to the detector. The time variation in the path

difference between the two beams modulates each wavelength of the collected radiation

at a unique frequency that is a function of the wavelength of the radiation and the velocity

of the moving mirror. Breaking down the signal generated by the detector into these

unique frequency components reveals how the individual wavelengths from the broadband

source interact with the sample under test generating a molecular fingerprint.

Infrared detectors used at the heart of the FTIR spectrophotometer must have the following

characteristics; wide spectral response range, high sensitivity, wide frequency bandwidth,

good linearity. LASER COMPONENTS off ers DLaTGS pyroelectric detectors that are ideal for

this demanding application. From our research and production facility in Florida we supply

customers all over the world with these industrial grade thermal detectors. A pyroelectric

infrared detector responds to a change in IR radiation (heat) absorbed on its surface and

they have a very wide spectral bandwidth. A pyroelectric crystal has an atomic structure

that will move slightly in response to a change in temperature, rearranging the electric

charge within the solid generating a voltage. The devices are manufactured in standard TO

style packages and have long expected lifetimes making them ideal for this fit and forget

application.

More Information https://www.lasercomponents.com/uk/product/pyroelectric-dlatgs-detectors/