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Effect of fresnel lens

Forum to discuss all areas of lighthouse technology such as optics, fuels, fog signals, radiobeacons, daymarks, construction, etc.

Postby LeadingLight » Sat Feb 27, 2010 2:13 am


My friend and Leading Lights photographer Joop van Putten bought an old Russian optic and made this photo in his garden at night: http://www.ruilof-images.nl/photoblog/index.php?showimage=57. Maybe not really interesting as a lighthouse photo, but it shows perfectly how the light is concentrated by the fresnel lens. That effect is not visible with operational lights, as they have no sheds, hedges or other objects within a few meters, so that makes this photo worth to take a look at. (His lighthouse photos are worth a visit too: http://www.ruilof-images.nl/Lighthouses/index.html)
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Postby Hersh » Sat Feb 27, 2010 7:10 am


An excellent illustration. Thanks for posting it.
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