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Acktar (pronunciation:/ʌktaːɹ/ ) is an industrial Nano- Technology company established 1992, located in Kiryat-Gat, Israel, with subsidiaries in Germany (ACM Coatings GmbH) and in Japan. Acktar develops and industrializes black high- emissive inorganic coatings that are fabricated using its proprietary vacuum deposition technology.
The black coatings induce a low fluorescent, high specific surface area coating, with a tightly controlled morphology to produce a very low reflectance level of less than 1.0%. The coating thickness is a few micrometers (typically 3-5 µm) and its density is typically ~1.8 g/cm3.[Y. Miron Salomon(1), N. Ariel Sternberg(1) I. Gouzman(2), G. Lempert(2) E. Grossman(2) 1] Litho BlackTM, Acktar's wafer- level coating bears only 0.8µm coating thickness. The deposition process is carried out at wide range of temperatures depending on the substrate. The coatings can be tailored to achieve desired electrical conductivity and levels of absorption or reflectance over a wide range of wavelengths from EUV to FIR. Another attribute of the coatings is biocompatibility, enabling the implementation of the coating in invasive medical application.
The coating processes are totally environmentally friendly and are used in applications such as precision optical equipment, optical packaging, laser systems, IR sensors / systems, medical, micro-optical devices, passive thermal management and aerospace systems.
Acktar coating was applied in numerous famous space instruments such as the infrared spectrograph (NIRSpec) - 'Super-Eye' instrument for the James Webb Space Telescope (JWST), and the Thermal Infrared Spectrometer Mertis for the Bepicolumbo mission to Mercury. In both instruments, the various parts were coated with 'Fractal Black', Acktar IR absorbing coating, and delivered to ESA / EADS- Astrium and other European sub-contractors in the ESA consortium. Acktar coatings are considered as the conventional black coatings and a source of comparison for new innovations in the field of optical black coatings.
Notes
[edit]- ^ Quijada M, Hagopian J, Getty S, Kinzer R, Wollack E. "Hemispherical Reflectance and Emittance Properties of Carbon Nanotubes Coatings at Infrared Wavelengths". NASA.
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