NJ9967 : Fresnel lens assemblies, Museum of Scottish Lighthouses

taken 14 years ago, near to Fraserburgh, Aberdeenshire, Great Britain

Fresnel lens assemblies, Museum of Scottish Lighthouses
Fresnel lens assemblies, Museum of Scottish Lighthouses
Using paraffin lamps, one challenge in designing lighthouses was to collect as much as possible of the light into one narrow beam. The fresnel lens uses a set of glass prisms to deflect light leaving in all directions to be added to the horizontal beam. These elaborate lenses were expensive. More powerful electric lights only need a concave mirror, much cheaper.
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NJ9967, 140 images   (more nearby search)
Photographer
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Date Taken
Tuesday, 11 September, 2007   (more nearby)
Submitted
Saturday, 22 September, 2007
Category
Lighthouse   (more nearby)
Subject Location
OSGB36: geotagged! NJ 998 675 [100m precision]
WGS84: 57:41.8824N 2:0.2408W
Camera Location
OSGB36: geotagged! NJ 998 675
View Direction
NORTH (about 0 degrees)
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