The Fresnel lens: An obsolete innovation finds a 21st-century role
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Part 1 examined a major technical problem of the 19th century: improving the efficiency and reach of the lighthouse beam, and why simply going “bigger” would not be possible. A new way of seeing the problem New ideas were needed, and the French government in the early 1800s was aware of the problem, even linking
21st Century Lighting Design 9781474293846, 9781472503138
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The Fresnel lens: An obsolete innovation finds a 21st-century role
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