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The human desire to see clearly beyond the limits of the naked eye and to be able to see into the distance is as old as humanity itself. The human desire to see clearly beyond the limits of the naked eye and to be able to see into the distance is as old as humanity itself. The human desire to see clearly beyond the limits of the naked eye and to be able to see into the distance is as old as humanity itself.

The milestones of optical inventions

CHANGING OUR VIEW OF THE STARS

    Lesezeit: 5 min.

    It began in the ancient Greece

    The first treatises on the phenomenon of light date back to Ancient Greece, and great philosophers such as Aristotle and Plato made detailed studies. Euclid’s Optics, the first work to deal with the mathematical principles of optics, was written around 300 BC and provided the foundation for all later works on the subject. At that time, optics was mainly understood as the science of vision. Many ancient theorists postulated that the eye sends out a kind of visual ray that strikes objects and makes them visible.

    The findings of the Greeks were subsequently built on by Arab scholars. With his Book of Optics, Ibn al-Haytham, also known as Alhazen, produced a treatise that was to remain the standard work on the subject for many hundreds of years. His conclusion was that vision involves rays of light entering the eye. The Renaissance marked the beginning of concerted efforts to observe and record nature. The findings of that time revolutionized the world in many areas – including the field of optics.

    THE RENAISSANCE MARKED THE BEGINNING OF CONCERTED EFFORTS TO OBSERVE AND RECORD NATURE
    Landscape grasses in front of the sky
    Atacama milky way, light, stars landscape ID:1230583
    The pioneers of optics

    Major milestones in optics were set by polymaths like Leonardo da Vinci (who invented a machine for grinding concave mirrors and lenses), Francesco Maurolico (the first person to identify the workings of the eye’s lens), and Giovanni Battista della Porta (who discovered that age-related long-sightedness and myopia can be corrected with lenses).

    The first telescopes

    The telescope was an optical invention that literally expanded our horizons and significantly changed our view of the stars. The first experiments were carried out in Holland around 1600, when it was attempted to mount two lenses behind each other. It’s amazing that it took so long to come up with this simple idea. Galileo Galilei heard about it and began grinding suitable lenses in his glass-blowing workshops in Venice.

    technical Prinzip Spotting Scope History GettyImages-929273082

    Galileo Galilei's telescope.

    The arrangement of lenses


    Engraving depicting the arrangement of lenses in Galileo Galilei's telescope. This had two double convex lenses. Galileo Galilei (1564-1642) an Italian polymath, physicist, philosopher, mathematician, and astronomer. Dated 19th Century. (Photo by: Universal History Archive / Universal Images Group via Getty Images)

    The telescope was an optical invention that literally expanded our horizons and significantly changed our view of the stars.

    17. Jahrhundert

    Teleskope von Galileo und Newton


    Dies sind 1923 und 1924 gefertigte Replikate der Teleskope, die 1609 von Galileo und 1668 von Sir Isaac Newton erfunden wurden. Das Galilei-Teleskop (rechts) verwendet Linsen für eine 21-fache Vergrößerung. Das Sehfeld ist jedoch sehr eingeschränkt, sodass er nur etwa ein Drittel des Monds auf einmal sehen konnte. Das Newtonteleskop (links) nutzt statt einer einfachen Linse, die aufgrund der Lichtstreuung falsche Farben erzeugt, einen konkaven Spiegel, um Licht zu sammeln. Der Betrachter blickt seitlich in das Teleskop. Der Lichtweg wird sowohl vom Hauptspiegel als auch dem Sekundärspiegel im flachen Winkel am Okular reflektiert. (Foto von SSPL/Getty Images)

    The age of modern Astronomy was born

    In 1609 Galileo Galilei built his own telescope with 20x magnification, and immediately realized how useful it was for spotting enemy ships on the horizon. In December of the same year Galileo turned his telescope to the heavens for the very first time. The age of modern astronomy was born, and 300 years later it still held the same fascination for Wilhelm Swarovski.