Visual aid in the form of telescopic spectacles with an...

G - Physics – 02 – B

Patent

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Details

G02B 25/00 (2006.01) G02B 21/20 (2006.01) G02B 27/01 (2006.01) G02C 7/08 (2006.01) G02B 5/30 (2006.01)

Patent

CA 2394003

The invention relates to a visual aid in the form of telescopic spectacles with two lens systems, each of which comprises at least one objective (70) and one ocular (71). An automatic focussing device that modifies the focal length of the lens systems in order to focus the same according to the distance from the telescopic spectacles to the object is allocated to the lens systems. A device for modifying the enlargement factor by modifying the focal length ("zoom") and a device for adapting the parallax between the lens systems of the visual aid to the focal length that is adjusted according to the distance of the telescopic spectacles from the object are also allocated to the lens systems. The parallax is adapted with adjustable optical elements (11) which are provided in the beam path of the lens systems and with which it is possible to alter the angle (13) between the beam paths (14) extending from the lens systems (1) to the object.

L'invention concerne un dispositif optique sous forme de lunette-loupe possédant deux systèmes de lentilles présentant respectivement au moins un objectif (70) et un oculaire (71). Un dispositif autofocus, associé aux systèmes de lentilles, modifie la focale des systèmes de lentilles pour effectuer leur mise au point en fonction de la distance séparant la lunette-loupe de l'objet. Un autre dispositif associé aux systèmes de lentilles permet de modifier le facteur de grossissement par modification de la focale des systèmes de lentilles ("Zoom"). Enfin, un dispositif associé aux systèmes de lentilles permet d'adapter l'axe parallèle entre les systèmes de lentilles du dispositif optique à la focale respectivement réglée en fonction de la distance séparant la lunette-loupe de l'objet. L'adaptation de l'axe parallèle est effectuée à l'aide d'éléments optiques (11) réglables placés dans la trajectoire du faisceau des systèmes de lentilles. Ces éléments optiques (11) permettent de modifier l'angle (13) entre les trajectoires de faisceaux (14) s'étendant des systèmes de lentilles (1) jusqu'à l'objet.

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