Detectors, infrared

Infrared absorption Infrared cameras Infrared detection Infrared detector Infrared detectors... 

Advantages. Like ultraviolet detectors, infrared detectors have their advantages and limitations. Several advantages of IR units make them valuable in certain installations ... 

Fig. 8. Dual-channel nondispersive infrared analyzer with a solid- slate detector. Infrared Industries, Inc)...

Advanced monitoring methodologies (gas detectors, infrared monitoring, thickness measurements by eddy current and magnetic methods)... 

The infrared-electrochemical cell, originally designed by Bewick and his coworkers, was partly modified to introduce an electrode from the upper part of the cell. The front side of the cell is attached with a CaFg optical window, and the backside with a glass syringe which pushes the electrode against the window. The Fourier transform infrared measurements were conducted at 0 °C for Cu electrodes and at ambient temperature for Ni and Fe electrodes by JIR-6000 (Nihon Densi, Co. Ltd.) externally equipped with an MCT (mercury-cadmium-telluride) detector. Infrared spectra were acquired by the subtraction of two spectra reflected from the electrode at different potentials (SNIFTIRS). The other details were described previously. [9]... 

FTS analyses all the spectral elements simultaneously which results in the so called Fellgett or multiplex advantage of FTS over conventional instruments in signal-to-noise ratio. For the intensity-independent noise of a detector (infrared... 

Figure 9. Optical and infrared images of human, osteopetrotic, trabecular bone. Data were collected at Beamline U4IR at the NSLS using a Spectra Tech Irps microscope and a Cu doped Ge detector (Infrared Laboratories). Apertures were sent at 12 by 12 pm and 128 scans were collected at 4 cm-1 resolution. Infrared images were generated by plotting peak height ratios of (left) 603/563 cm-1 and (right) 538/563 cm-1. [Used by permission of Elsevier Science, from Miller et al. (2001), Biochimica at Biophysica Acta, Vol. 1527, Fig. 8, p. 17.]...

Infrared Absorption Detectors. Two types of infrared detectors have been offered commercially. The first is a filter instrument similar in design to that shown in Figure 16-13. The second, and more sophisticated, type of infrared detector is based on Fourier transform instruments similar to those discussed in Section I6B-1. Several of the manufacturers of Fourier transform infrared (FTIR) instruments offer accessories that permit their use as HPLC detectors. Infrared detector cells are similar in construction to those used with ultraviolet radiation except that windows arc constructed of sodium chloride or calcium fluoride. Cell path lengths range from 0.2 to 1.0 mm and volumes from 1.5 to 10 pL. 

Various modem accessories (ATR crystals, acoustic detectors, infrared microscopes, polarization modulation technique) as well as hyphenation techniques have substantially expanded the field of application of infrared spectroscopy. Applications of IR spectroscopy to surface investigations (characterization of the surface, physi-sorption and chemisorption studies, catalytic properties) are reviewed in [7-9]. Applications of hyphenated techniques, in particular combinations with chromatography, are given in [8]. 

From the source to the detector, infrared light covers an optical path of more than 8 m, which means that a considerable amount of power is lost during travel due to vignetting by the optical components of the system (mirrors, filters, among others). Atmospheric attenuation is also present at these wavelengths, meaning the so-called water-lines mask part of the spectra. For these reasons the optical efficiency has fo be modelled and understood, to overcome as much as possible or to discriminate signal from environmental/system noise. 

R. W. Boyd, Photon bunching and the photon-noise-limited performance of infrared detectors. Infrared Phys. 22(3), 157-162 (1982). ISSN 0020-0891. doi 10.1016/0020-0891(82)90034-3. http //www.sciencedirectcom/science/article/pii/0020089182900343... 

Analysis of polyethylene NBS 1475, two columns PL gel 10 pm MIXED-B 300 x 7.5 mm, eluant trichlorobenzene, flow rate 1 ml/minute, temperature 140°C, detector infrared. 

Detectors. Infrared Spectroscopy Overview. Liquid Chromatography Instrumentation Pharmaceuticai Appiications. 

M. Qrudzien, J. Piotrowski, Monolithic optically immersed HgCdTe IR detectors. Infrared Phys. 29(2), 251-253 (1989)... 

T. Ashley, C.T. Elliott, A.T. Harker, Non-equilibrium modes of operation for infrared detectors. Infrared Phys. 26(5), 303-315 (1986)... 

Detector, infrared - A transducer element that converts incoming radiant energy impinging on its sensitive surface to a useful electrical signal. 

Thermal detector, infrared - A type of infrared detector that changes electrical characteristics as a function of temperature typically, thermal detectors have slow response, (on the order of milliseconds) broad spectral response and usually operate at room temperature thermal detectors are commonly used in IR radiation thermometers and in some imagers. 

Depression of the freezing point, 8-52 to 77, 15-28,15-29 Derivatives, A-9 to 11 Detectors, infrared, 10-245 Determination of Relative Humidity from Dew Point, 15-31... 

Electro Optical Components Inc Web Site (2014) by Electro Optical Components, Inc., Santa Rosa, CA. Accessed April 2014 at http //www.eoc-inc.com/infrared source.htm. Sources and Pyroelectric Detectors, Thermopile Detectors, Infrared Filters. 

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