Vidicon pyroelectric

D. L. Folia and J. R. Choi, Monolithic Pyroelectric Bolometer Arrays N. Teranishi, Thermoelectric Uncooled Infrared Focal Plane Arrays M. F. Tompsett, Pyroelectric Vidicon... 

The OMA technology has been recently applied to infra-red spectroscopy ( 18) as well. A pyroelectric vidicon (utilizing a triglycine sulfate as the sensor element) has been used as a thermal rather than a photon multichannel detector. Simultaneous spectral detection, in the 1-30 um spectral region, was accomplished that has proven to be particularly useful for IR pulse laser applications, Fig.12,... 

Table I, provided yet another instrumental approach for balloon experiments intended to measure the extinction of solar radiation by stratospheric aerosol. Spectrometer 4, Table I, based on the use of a pyroelectric vidicon image device, was developed to measure the strong absorption bands of non-isonuclear molecules ( 2-5 ym range). Recently we have developed spectrometer 5, Table I, based on the use of a self-scanned solid state pyroelectric array sensor. The main advantages of this sensor, over the pyroelectric vidicon, are its improved sensitivity and reduced channel-to-channel cross-talk.

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... 

The average spectral resolution was approx. 50 cm, limited by the sensitivity of the pyroelectric vidicon. The target, poly-vinylidene phthalate (PVH2), is approx, ten times less sensitive... 

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 TGS group includes the isomorphs triglycine selenate and fluoberyllate, the corresponding deuterated compounds, mixed crystals of these and material doped with other amino acids or with metals. These materials are used for the most sensitive detectors and also in the pyroelectric vidicon. They have several disadvantages however, with the result that the refractory oxide materials or the polymer films tend to be preferred where their performance is adequate. 

Fig. 3.13. Performance of commercially available pyroelectric vidicons (taken from manufacturers data sheets)...

Pig. 3.14. Thermal picture taken with pyroelectric vidicon similar to P8092 (Fig. 3.13) usings RankIRTAL31ens... 

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... 

Figure 12 shows a view of a car parking area using a Matsushita Research Institute (Tbkyo) pyroelectric vidicon camera [21] in which an uniaxially stretched PVDF film (6 pim) is used. 

Pyroelectric vidkon tubes using flat PVDF film has not enough responsivity as the IR imaging device, as shown in Sectioo D1.B, compared with a pyroelectric vidicon tubes having a reticulated TGS single crystal taigeL which have better image resolution. 

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