Pyroelectric vidicon thermal imagers

These instruments have also been superceded by instmments using two-dimensional IR focal plane staring arrays, although there are some pyrovidicon imagers still in use. For reference purposes, the following description and illustration are provided. 

Published performance characteristics of commercially available IR thermal imaging systems can be found in Appendix A. Detailed discussions of diagnostic software and image recording methods can be found in Chapter 4. 

Start in the Temp, column and find the temperature you wish to convert. 

If the temperature to be converted is in degrees C, scan to the right column for the degrees F equivalent. 

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Because many atmospheric constituents absorb efficiently in the infrared spectral region, the development of an IR multichannel spectrometer was important to complement our near IR spectrometers. Originally, the pyroelectric vidicon (16) was selected as the IR image devices. This imager is a thermal rather than photon detector, and as such detects only variations... 

Spatially extended thermal detectors are also used to form infrared imaging systems. These have been employed in electron beam tubes, such as the pyroelectric vidicon and in systems with optical readout, such as the... 

The most promising thermal imaging system is that using the pyroelectric vidicon. The present development stems from the work of Hadni et al. [3.74,75]. 

The most important applications of pyroelectric effect are in the field of detectors of infrared radiation, thermal imaging and pyroelectric vidicons and photoferro-electric detectors. Pyroelectric materials are also used in electrically calibrated pyroelectric radiometers, for measurement of energy, in chemical analysis and in... 

A pyroelectric vidicon or pyrovidicon is a video camera tube that operates in the IR (2-20 pm) region instead of the visible spectrum. Electronically scanned thermal imaging systems based on pyrovidicons and filtered to operate in the 8-14 pm atmospheric window provide qualitative thermal images and are classified as thermal viewers. Figure 2.21 is a cross-sectional schematic of a pyrovidicon camera tube used in pyrovidicon imagers. The output of the pyrovidicon tube is compatible with standard video processing electronics. 

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