About: Reflecting instrument

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Reflecting instruments are those that use mirrors to enhance their ability to make measurements. In particular, the use of mirrors permits one to observe two objects simultaneously while measuring the angular distance between the objects. While reflecting instruments are used in many professions, they are primarily associated with celestial navigation as the need to solve navigation problems, in particular the problem of the longitude, was the primary motivation in their development.

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  • Ως δικάτοπτρο χαρακτηρίζεται οτιδήποτε φέρει δύο κάτοπτρα (καθρέπτες). Το δικάτοπτρο είναι γεωμετρικό και μάλιστα γωνιομετρικό όργανο με ευρύτατη χρήση στη γεωδαισία, την αστρονομία, την υδρογραφία και ιδιαίτερα στη ναυτιλία, όπου είναι περισσότερο γνωστό με το όνομα εξάντας ή οκτάς (κοινώς «οττάντε») ή και ακόμα ως «κύκλος του Μπορντά». (el)
  • Reflecting instruments are those that use mirrors to enhance their ability to make measurements. In particular, the use of mirrors permits one to observe two objects simultaneously while measuring the angular distance between the objects. While reflecting instruments are used in many professions, they are primarily associated with celestial navigation as the need to solve navigation problems, in particular the problem of the longitude, was the primary motivation in their development. (en)
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  • Ως δικάτοπτρο χαρακτηρίζεται οτιδήποτε φέρει δύο κάτοπτρα (καθρέπτες). Το δικάτοπτρο είναι γεωμετρικό και μάλιστα γωνιομετρικό όργανο με ευρύτατη χρήση στη γεωδαισία, την αστρονομία, την υδρογραφία και ιδιαίτερα στη ναυτιλία, όπου είναι περισσότερο γνωστό με το όνομα εξάντας ή οκτάς (κοινώς «οττάντε») ή και ακόμα ως «κύκλος του Μπορντά». (el)
  • Reflecting instruments are those that use mirrors to enhance their ability to make measurements. In particular, the use of mirrors permits one to observe two objects simultaneously while measuring the angular distance between the objects. While reflecting instruments are used in many professions, they are primarily associated with celestial navigation as the need to solve navigation problems, in particular the problem of the longitude, was the primary motivation in their development. (en)
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  • Δικάτοπτρο (el)
  • Reflecting instrument (en)
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