FIXATION TARGET, CENTRATION APPARATUS AND USE

A fixation target (70) serves to produce a light field for aligning the viewing direction of a spectacle wearer (30) when measuring the spectacle wearer (30) by means of a centration apparatus (10). A transparent lens body (60) is used during operation to optically shape an electromagnetic radiation...

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Bibliographische Detailangaben
Hauptverfasser:	TRUMM, Stephan, STUTZ, Michel, GROMANN, Lukas
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTACT LENSES DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEDICAL OR VETERINARY SCIENCE OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES SURGERY
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Beschreibung
Zusammenfassung:	A fixation target (70) serves to produce a light field for aligning the viewing direction of a spectacle wearer (30) when measuring the spectacle wearer (30) by means of a centration apparatus (10). A transparent lens body (60) is used during operation to optically shape an electromagnetic radiation of the produced light field. During operation, the electromagnetic radiation of the produced light field is emitted in an emission direction (A) from an optical emission side (61) of the lens body (60). A back side (62) of the lens body (61) is formed on a back side surface of the lens body (60) facing away from the emission side (61). In this case, the transparent lens body (60) extends from the emission side (61) to the back side (62) counter to the emission direction (A) and, in the process, extends at least to a focal plane of the lens body (60).