Infrared coating materials

Conversely, in the summer, it would still have a high transparency for the visible, but a high reflectivity for the near infrared and a high emissivity for the far infrared. The present state of the art of thin-films deposition still falls short of this goal which may have to wait for the development of suitable photochromic coating materials. 

L.V. Wake and R.F. Brady, Formulating Infrared Coatings for Defence Applications, Materials Research Laboratory, Melbourne, Australia, 1993 Chem. Abstr., 123, 289699a). 

R.A. Me. Kyton and J.J. Wallis, Thin film materials and deposition techniques for infrared coatings, FA Techn. Rep., 74028, Frankford Arsenal, Philadelphia, PA, Oct. 1974. 

Infrared and nuclear magnetic resonance spectroscopy are the most important spectroscopic methods for analyzing coating materials. Near infrared Fourier transform (NIRFT) Raman spectroscopy [10.8] also has great potential, particularly for aqueous systems. UV/VIS spectroscopy is used only in exceptional cases, e.g., to determine light protection agents (UV absorbers). 

Dielectric heating is used to dry printing inks, adhesives, and coating materials on paper, as well as to dry the paper itself. This has been combined with hot air, infrared, and other heating media to achieve optimum results. Some examples of commercial installations include the following [9] ... 

J. Save, in Infrared Optical Materials and Their Antireflection Coatings, Adam Hilger, Bristol, Boston, 1985, p. 119. 

The objective of this chapter is to study the absorption and reflection of infrared light by the uncoated and A1 coated surfaces of polymier films using transmission and reflection techniques. For this purpose two commercial biaxially oriented polypropylene film, a cast polypropylene film, a milk cover and a chocolate coating material with their one surface coated with a thin aluminum layer were examined by irrfrared spectroscopy. One surface of the each film was coated with a thin aluminum layer. 

DLC coatings also have an opto-protective function, infrared window materials such as germanium, magnesium fluoride, cadmium telluride, zinc sulfide, and zinc selenide are rel h/ely soft and easily damaged and eroded by wind, rain, or particle impact. They have also poor resistance to corrosive environments. DLC coatings offer good protection with adequate optical properties. However, their narrow IR bandpass may limit the range of applications. 

M. Miagi, K. Harada, Y. Aizawa, S. Kawakami, Transmission Properties of Dielectric-Coated Metallic Waveguides For Infrared Transmission , SPIE 484 Infrared Optical Materials and Fibers III 1984. 

Nonmilitary infrared apphcations for germanium include CO2 lasers (qv), intmsion alarms, and pohce and border patrol surveillance devices. Germanium is used as a thin-film coating for infrared materials to decrease reflection losses or to provide heavy filtering action below 2 p.m. 

Infrared patterns can lead to detection of lack of bonding between surface platings, between coatings and base metal, or within bra2ed honeycombs and other composite materials where bonding is vital. Mote recent developments involve infrared television or image tubes similar to the types used for night vision in military and other appHcations. 

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