FR2854969A1

FR2854969A1 - Lens dimensions calculation method for optical spectacles, has calibration carried out at full on computer screen, and nose and pupils drawn on screen so that frame can be directly placed on screen to calculate lens dimensions

Info

Publication number: FR2854969A1
Application number: FR0305987A
Authority: FR
Inventors: Xavier Carriou
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-15
Filing date: 2003-05-15
Publication date: 2004-11-19
Anticipated expiration: 2023-05-15
Also published as: FR2854969B1

Abstract

Vertical and horizontal calibrations are performed on computer screen at scale of 1 to 1. Computer displays pupils and nose of wearer at scale of 1 to 1. Software traces concentric circles on the centers of the pupils. Calibrated circles permit positioning of frame on screen and calculation of minimum diameter, which indicates internal diameter on each side of frame as well as lens thickness at any point selected with cursor.

Description

L'invention concerne un dispositif pour calculer le diamètre minimum duThe invention relates to a device for calculating the minimum diameter of the

verreglass

à réaliser pour son futur montage dans une monture de lunettes. to be made for its future mounting in a spectacle frame.

Les dispositifs actuels pour calculer-le -diamètre minimum sont de deux catégo5 ries: -Les dispositifs manuels basés sur le principe d'un papier millimétré que l'on glisse sous la monture. Cette solution a divers inconvénients: d'une part la manipulation est importante, d'autre part la précision est médiocre car seuls quelques cercles concentriques sont dessinés sur le papier millimétré, enfin cette so10 lution oblige à avoir autant de papiers millimétrés qu'il existe de types de verres. The current devices for calculating the minimum diameter are of two categories: -Manual devices based on the principle of a graph paper which one slides under the frame. This solution has various drawbacks: on the one hand the handling is important, on the other hand the precision is poor because only a few concentric circles are drawn on the graph paper, finally this solution requires having as many graph papers as there are types of glasses.

-Les dispositifs automatiques par palpage de la monture qui grâce à un logiciel calculent le diamètre minimum pour le verre à réaliser. Cette solution impose un outillage important et onéreux pour une information relativement simple. -The automatic devices by probing the frame which, thanks to software, calculate the minimum diameter for the lens to be produced. This solution requires significant and expensive tools for relatively simple information.

L'invention permet de remédier à ces inconvénients. Elle consiste en un outil plus simple d'emploi et plus précis que les papiers millimétrés, et est beaucoup moins complexe que les systèmes de palpage qui sont longs et fastidieux à mettre en place. En effet, selon un dispositif préférentiel, l'application de la monture sur un simple écran d'ordinateur permet de visualiser le diamètre mini20 mum. Au préalable, un logiciel aura étalonné l'écran et marqué l'emplacement des pupilles sur une ligne horizontale ainsi que celui du nez par une bande verticale. un cercle concentrique à chaque centre pupillaire pourra être utilisé pour vérifier de visu que le cercle correspondant au diamètre du verre, contient bien la monture. The invention overcomes these drawbacks. It consists of a tool that is easier to use and more precise than millimeter paper, and is much less complex than probing systems which are long and tedious to set up. In fact, according to a preferred device, the application of the frame on a simple computer screen makes it possible to view the minimum diameter 20 mm. Beforehand, software will have calibrated the screen and marked the location of the pupils on a horizontal line as well as that of the nose with a vertical strip. a circle concentric to each pupil center can be used to check visually that the circle corresponding to the diameter of the lens, indeed contains the frame.

Selon une variante, les cercles sont décentrés afin de correspondre au type de verre choisi si celui-ci est décentré. Alternatively, the circles are off-center to match the type of glass chosen if it is off-center.

Selon une autre variante, les cercles correspondants au verre sont remplacés par des ellipses concentriques correspondant aux verres elliptiques Selon une autre variante, la base de la monture peut être visualisée à l'écran afin de choisir le bon diamètre avec une contrainte de hauteur supplémentaire, selon une forme préférentielle, les repères bougent sur l'écran sans que la monture ne doive être déplacée. According to another variant, the circles corresponding to the lens are replaced by concentric ellipses corresponding to the elliptical lenses. According to another variant, the base of the frame can be viewed on the screen in order to choose the right diameter with an additional height constraint, in a preferred form, the pins move on the screen without the frame having to be moved.

De plus, les données correspondant à l'amétropie du sujet et sa morphologie 35 étant déjà rentrés sur un ordinateur, de nombreuses applications sont alors disponibles, et en particulier le calcul de l'épaisseur du verre en un point quelconque dans le cercle de la monture. In addition, the data corresponding to the subject's ametropia and its morphology 35 having already entered on a computer, numerous applications are then available, and in particular the calculation of the thickness of the glass at any point in the circle of the mount.

Claims

1) Method for calculating the minimum diameter and the thickness of a corrective lens inscribed in a spectacle frame, characterized by the vertical calibration 5 then horizontal of a computer screen at scale 1, firstly .

The computer stylizes the pupils and the nose of the future wearer to scale 1 on the screen. The software draws concentric circles at the pupil centers. The calibrated circles thus make it possible to position a frame on the screen and to calculate the minimum diameter which inscribes the caliber on each side of the frame as well as the thickness of the lens at any point where the cursor is located. 'screen.

2) Method according to claim 1 characterized in that: certain circles can be off-center by the same value as the glasses themselves. 15

3) Method according to claim 1 or 2 characterized in that: in the case of elliptical glasses, ellipses replace the circles.

4) Method according to claim 1, 2 or 3 characterized in that: if a mounting height is necessary the software draws a lower bar stylizing the bottom of the frame in order to know the minimum diameter with this additional constraint and the thickness glass at any point where the cursor is on the screen.