thumb|Dipleidoscope A dipleidoscope is an instrument used to determine true noon; its name comes from the Greek for double image viewer. It consists of a small telescope and a prism that creates a double image of the sun. When the two images overlap, it is local true noon. The instrument is capable of determining true noon to within ten seconds.
thumb|Dipleidoscope A dipleidoscope is an instrument used to determine true noon; its name comes from the Greek for double image viewer. It consists of a small telescope and a prism that creates a double image of the sun. When the two images overlap, it is local true noon. The instrument is capable of determining true noon to within ten seconds.
The dipleidoscope was invented by Giovanni Battista Amici in the first half of the 19th century.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).