filter layer
81Optical coating — Optically coated mirrors and lenses. An optical coating is one or more thin layers of material deposited on an optical component such as a lens or mirror, which alters the way in which the optic reflects and transmits light. One type of optical… …
82Application firewall — An application firewall is a form of firewall which controls input, output, and/or access from, to, or by an application or service. It operates by monitoring and potentially blocking the input, output, or system service calls which do not meet… …
83Perl Object Environment — For the Mach variant, see Mach kernel The Perl Object Environment or POE is a library of Perl modules written in the Perl programming language by Rocco Caputo et alia. From CPAN:: POE originally was developed as the core of a persistent object… …
84optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …
85Filtration — This article is about operation of solid fluid separation. For the mathematical concept, see filtration (mathematics). For the equipment used, see Filter (disambiguation). For filtration used in winemaking, see Filtration (wine). Diagram of… …
86Chromatography — Pictured is a sophisticated gas chromatography system. This instrument records concentrations of acrylonitrile in the air at various points throughout the chemical laboratory. Chromatography (from Greek χρῶμα chroma color and γράφειν graphein to… …
87Lubricant — A lubricant is a substance introduced to reduce friction between moving surfaces. It may also have the function of transporting foreign particles and of distributing heat. The property of reducing friction is known as lubricity. A good lubricant… …
88Organic light-emitting diode — Demonstration of a flexible OLED device A green emitting OLED device An …
89Green roof — Traditional sod roofs can be seen in many places in the Faroe Islands …
90Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
