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Preview of “ZEISS Microscopy Online ...opy Basics | Objectives”
Preview of “ZEISS Microscopy Online ...opy Basics | Objectives”

... The  most  common  objectives  used  on  laboratory  microscopes  are  the  achromatic  objectives. Such  objectives  are  corrected  for  axial  chromatic  aberration  in  blue  and  red  wavelengths,  which are  about  486  and  656  nanometers,  respectively.  Both  are  brought  into  a  single ...
Topic: High Performance Data Acquisition Systems Analog
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a short form catalogue detailing them along with possible

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Night vision device



A night vision device (NVD) is an optoelectronic device that allows images to be produced in levels of light approaching total darkness. The image may be a conversion to visible light of both visible light and near-infrared, while by convention detection of thermal infrared is denoted thermal imaging. The image produced is typically monochrome, e.g. shades of green. NVDs are most often used by the military and law enforcement agencies, but are available to civilian users. The term usually refers to a complete unit, including an image intensifier tube, a protective and generally water-resistant housing, and some type of mounting system. Many NVDs also include optical components such as a sacrificial lens, or telescopic lenses or mirrors. An NVD may have an IR illuminator, making it an active as opposed to passive night vision device.Night vision devices were first used in World War II, and came into wide use during the Vietnam War. The technology has evolved greatly since their introduction, leading to several ""generations"" of night vision equipment with performance increasing and price decreasing. Consequently, they are available for a wide range of applications, e.g. for gunners, drivers and aviators. Another term is ""night optical/observation device"" or NOD.
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