Windjammer Ship Boat Deck Prism Green Solid Art Glass Diamond Hexagonal

Windjammer Ship Boat Deck Prism Green Solid Art Glass Diamond Hexagonal

Windjammer Deck Prism Solid Green Glass Paperweight Handmade - Authentic Models



Deck prism is a prism inserted into the deck of a ship to provide light down below.

Group of original deck prisms. For centuries, sailing ships used deck prisms to provide a safe source of natural sunlight to illuminate areas below decks.

Before electricity, light below a vessel's deck was provided by candles, oil and kerosene lamps--all dangerous aboard a wooden ship.

The deck prism was a clever solution: laid flush into the deck, the glass prism refracted and dispersed natural light into the space below from a small deck opening without weakening the planks or becoming a fire hazard. In normal usage, the prism hangs below the overhead and disperses the light sideways; the top is flat and installed flush with the deck, becoming part of the deck.

A plain flat glass window would just form a single bright spot below

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