Infrared sensitivity

From the early 1980s to present, infrared sensitive two dimensional arrays were mated to integrated circuits for signal processing and sensitivity to better than 0.03 K (see Photodetectors). These focal plane arrays of some 500 by 500 elements eliminate the need for scanning and provide good spatial resolution. Some versions have no special cooling requirements. The development trend is to increase the number of pixels to improve resolution, increase the field of view and keep the size and cost of the optics within acceptable bounds. 

The GaAs laser used as light source emits at about 820 nm. Thus dyes in the actual sense are not needed rather, ir-absorbers for the spectmm between 750—850 nm Httie experience is available on this class of dyes, especially as far as their stabiHty is concerned, although much work has been done in this area. Also, infrared sensitive dyes and pigments, used in electrophotography, may be very suitable for WORM disks (8). 

Mecher, E., Gallego-Gomez, F., Tillmann, H., Horhold, H.H., Hummelen, J.C., and Meerholz, K. (2002) Near-infrared sensitivity enhancement of photorefractive polymer composites by pre-illumination. 

Paul W. Kruse, The Emergence of (Hgt ICdJ.)Te as a Modern Infrared Sensitive Material H.E. Hirsch, S.C. Liang, and A.G. White, Preparation of High-Purity Cadmium, Mercury, and Tellurium... 

Y. Tsuchiya, H. Suzuki, M. Koishi, K. Kinoshita, T. Nakamura, Infrared sensitive universal streak camera for use in 1.0 to 1.6 micron wavelength region, in High Speed Photography, Videography, and Photonics III, Proc. SPIE 569, 181-188 (1985). 

In the chemiluminescent detection of nitrogen oxides, a constant source of ozone reacts with a metered air sample containing nitric oxide. Fontijn et al. suggested that this method could also be used for ozone detection by using a constant nitric oxide source for reaction with ozone in the air sample. The ozone-nitric oxide reaction is carried out at reduced pressure, to avoid quenching the chemiluminescent reaction. Detection of the emission in the spectral r on involved (600-3,000 nm) requires using a near-infrared-sensitive photomultiplier tube. The noise of such a photomultiplier tube is reduced by cooling it to about - 20 C. ... 

Nylon 11 (Equation 6.56) is also a piezoelectric material that can be aligned when placed in a strong electromagnetic field giving films used in infrared-sensitive cameras, underwater detection devices, and in electronic devices since it can be overlaid with printed circuits. 

The DIP concept is readily applicable to any part of the UV/visible/near infrared spectrum by the appropriate choice of the dye. Law, Vincett and Johnson (19), from these laboratories have reported the development of a infrared sensitive DIP disk. 

Sensitized photoconductivity of up to 1300 nm was demonstrated for PAC using various types of dyes [279]. The main features for infrared sensitizers were the same as for visual ones. 

Infrared-sensitive films and plates may be divided into two classes (1) materials of relatively high speed to the extreme red and infrared,... 

All infrared-sensitive materials must be loaded and developed in total darkness, as safelight screens, even those for panchromatic films and plates, transmit the infrared freely. 

Sequential photographs can be used to monitor pupil size over an extended time. If the pupil is illuminated with infrared fight and infrared-sensitive film is used, recordings can be made in total darkness. Although this method was used in seminal studies of the pupillary light reflex and other dynamic applications,6 7 it is seldom used today because of the high cost of film, processing time, and limited temporal resolution. 

Ballard, James W., Infrared sensitivity of cesium oxide... 

Phosphors, infrared-sensitive, 3 11 strontium selenide-samarium-eu-ropium, 3 22... 

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