TAILIEUCHUNG - Fiber Optics Illustrated Dictionary - Part 49

The Fiber Optics Illustrated Dictionary - Part 49 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary signals such as those from distant objects stars or military targets or night vision devices. An image intensifying system may be configured with shutoff circuits to prevent eye damage that could result from an image display that is too bright as in night vision goggles . Commercial products are typically classified according to image resolution and degree of intensification that is possible. Image intensifiers are also used outside the optical spectrum. They are particularly useful for intensifying X-rays since there is a hazard involved with using strong X-rays and the lowest dosages possible should be used. Intensification enables the technician to get more information out of a weak signal. See Johnson John. Image Intensifier - Night Vision Goggles Night vision goggles are an example of image intensifying technology. Fiber optic components are used in 2nd- 3rd- and 4th-generation image intensifier tubes that are used as step plates 2nd generation andfaceplates 3rd and 4th . Fiber optic inverters form the output component of the intensifier and may flip over the image inverted by an imaging lens. This is accomplished by twisting the axis of the fibers so the output at the end of the filaments is rotated 180 from the input light. Officer M. Lewis of the . Army positions night vision goggles on a flight helmet for a helicopter mission. DefenseLink News Photo April 1997. image inverter A software algorithm or physical mechanism for flipping an image right to left or top to bottom or both. Many optical lenses will invert an image in the process of focusing or directing light through their structures and the image may need to be returned to its original orientation to be viewed. Many of the newer display devices including wall-hung thin-screen displays and TFT displays for vehicles are designed to invert an image so the display can be hung from the ceiling rather than being set on a shelf or mounted from the floor. An array of .

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