Search results
Results from the WOW.Com Content Network
A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses .
Notes written by Thomas Digges in the publication of the book Pantometria in 1570 contain descriptions of how Leonard Digges made use of a "proportional Glass" to view distant objects and people. Some, such as astronomer and historian Colin Ronan , claim this describes a reflecting or refracting telescope built between 1540 and 1559, but its ...
Hans Lipperhey is known for the earliest written record of a refracting telescope, a patent he filed in 1608. [1] [2] His work with optical devices grew out of his work as a spectacle maker, [3] an industry that had started in Venice and Florence in the thirteenth century, [4] and later expanded to the Netherlands and Germany. [5]
Notes on Hans Lippershey's unsuccessful telescope patent in 1608. The first record of a telescope comes from the Netherlands in 1608. It is in a patent filed by Middelburg spectacle-maker Hans Lippershey with the States General of the Netherlands on 2 October 1608 for his instrument "for seeing things far away as if they were nearby." [12] A few weeks later another Dutch instrument-maker ...
1608 – Hans Lippershey tries to patent an optical refracting telescope, the first recorded functional telescope; 1609 – Galileo Galilei builds his first optical refracting telescope; 1616 – Niccolò Zucchi experiments with a reflecting telescope; 1633 – Construction of Leiden University Observatory
The telescope is more a discovery of optical craftsmen than an invention of a scientist. [1] [2] The lens and the properties of refracting and reflecting light had been known since antiquity, and theory on how they worked was developed by ancient Greek philosophers, preserved and expanded on in the medieval Islamic world, and had reached a significantly advanced state by the time of the ...
He also invented an improved version of the refracting telescope, the Keplerian telescope, which became the foundation of the modern refracting telescope, [13] while also improving on the telescope design by Galileo Galilei, [14] who mentioned Kepler's discoveries in his work.
The telescope had a flat diagonal secondary mirror bouncing the light at a 90° angle to a Plano-convex eyepiece with a probable focal length of 4.5mm yielding his observed 35 times magnification. Newton said the telescope was 6.25 inches long; this matches the length of the instrument pictured in his monograph "Opticks".