Abstract: In this work is studied the possibility to integrate a Fresnel lens array in a compact infrared spectrometer with the scope of focusing and also spectral filtering the incoming radiation, by ...

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The tower sits on a concrete foundation 10 feet deep. The Fresnel lens was made by Sautter & Lemonnier of Paris, France. When it was operational, the light produced a focal plane 58 feet above the ...

Guests who take the museum tour may climb to the top. The light originally was equipped with a third order Fresnel lens. The lighthouse, museum and gift shop are open from 10 a.m. to 6 p.m. every ...