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IFOPT (Identification of Fixed Objects in Public Transport) is a CEN Technical Specification that provides a Reference Data Model for describing the main fixed objects required for public access to Public transport, that is to say Transportation hubs (such as airports, stations, bus stops, ports, and other destination places and points of interest, as well as their entrances, platforms ...
Within the CEN, standards are drafted by Technical Committees (TCs) [2] of particular scope on the basis of national participation by the CEN members, i.e. the National Standardization Bodies of the European Union member states and some additional European country. [3] The following Technical Committees exist or existed within CEN: [4]
The CEN SIRI standard was developed from European national standards for real-time data exchange, in particular the German VDV 453 standard, between 2000 and 2005, and included eight functional services. V1.0 became a CEN Technical Standard in 2006 and a full CEN standard in 2009.
A small surveillance scope intended primarily for Law Enforcement use, that is designed specifically to use surplus MX9644 tubes from AN/PVS-4s that are upgraded to Gen III tubes. ITT's F4960 Stinger night sight
Field of view is the area of the inspection captured on the camera’s imager. The size of the field of view and the size of the camera’s imager directly affect the image resolution (one determining factor in accuracy). Working distance is the distance between the back of the lens and the target object.
In optics, pinholes with diameter between a few micrometers and a hundred micrometers are used as apertures in optical systems. Pinholes are commonly used to spatially filter a beam (such as a laser beam), where the small pinhole acts as a low-pass filter for spatial frequencies in the image plane of the beam. [1] [2]
After the Dresden Agreement (1996), CENELEC coordinates standard development activities with IEC.Older IEC standards were converted in 1997 by adding 60000, for example IEC 27 became IEC 60027 and the same standards are also published in the EN 60000 series to indicate adoption by CENELEC as a European standard; for example IEC 60034 is also available as EN 60034.
Depending on the size and focal length of a particular lens, a certain diameter of hole is drilled in the center of the lens board to accommodate the shutter assembly. Lens boards are typically available pre-drilled by the camera manufacturer, however, if no replacement lens board is available from a camera manufacturer, then one can be custom fabricated by a machinist.
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