Catadiopteric Light

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“Catadioptric Fixed Light.—This apparatus, in which a central burner is used, consists of a dioptric cylindric refractor with zones of silvered mirror above and below similar in profile to Bordier Marcet’s reflector. By the adoption of the refractor the whole of the wasteful divergence which occurs in Marcet’s reflector is prevented. We have here a geometrically perfect combination, but it is not so physically, because metallic reflexion is used. This physical defect Fresnel obviated in his next design.” —The Encyclopedia Britannica, 1910


The Encyclopedia Britannica, New Warner Edition (New York, NY: The Werner Company, 1893)


TIFF (full resolution)

1797×2400, 407.3 KiB

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766×1024, 68.3 KiB

Medium GIF

479×640, 37.1 KiB

Small GIF

239×320, 14.9 KiB