markierte Beiträge“technik”
Lyngvig Fyr, Lighthouse Lighthouse Fresnel lense, we see the top glashouse from Lyngvig-Lighthouse. A system of lenses and prisms – a combined Fresnel lens – condenses light from the lighting assembly . Four of these lens systems are mounted on a grid of brass. The combine four constant light rays. The whole system is rotating about a vertical axis. The total lantern floating on a ring-shaped vessel filled with mercury . Lanternen foot forming a lid on this vessel . This device provides an almost frictionless movement of the lantern . In order to avoid evaporation must kerosene is poured over the mercury. The boiler personnel should constantly pouring kerosene…
AUDI R 8The ADAC GT Masters is a grand tourer-based auto racing series.Each event consists of two races, with a duration of 60 minutes.The drivers must make a pit stop during each race and switch drivers, with the drivers also swapping their driving order from one race to another.In the first race usually the amateur driver drives the start, this leaves the professional driver to drive the start in the second race of each round.This is the race-car from YACO-Racing Team in saison 2014.We see an Audi R8 LMS ultra is parked behind pit-Lane area in the Parc fermé. Team-info:www.adac-gt-masters.de/de/teamportrait/yaco-racing-1414 is a freehand shot, HDR with 3 exposures (-2, 0,…
freehand shot HDR with 3 exposures (-2, 0, +2 EV) processing in Photomatix and PS. visit: www.flickr.com/photos/magnetismus/8157573498/in/photostre… Kamera: Canon EOS 60D Brennweite: 11mm Blende: ƒ/9 Verschlusszeit: 1/60s ISO: 100 Aufgenommen: 28 Juni, 2012 Urheberrecht: www.bildmagnet.com
we see the top glashouse from Hirtshals-Lighthouse. Hirtshals Lighthouse The lighthouse Hirtshals is located in Northern Jutland (Denmark) A Fresnel lens is an optical lens, which was invented by Augustin-Jean Fresnel. Originally developed for lighthouses, enables the design principle of the construction of large lenses with short focal length without the weight and volume of conventional lenses. The reduction in volume occurs at the Fresnel lens by a division into annular regions. In each area, the thickness is reduced, so that the lens is replaced by a series of annular steps. Since light is broken only at the surface of the lens, the refractive angle is not on the thickness,…