Device for determining the position and/or the transverse dimension of a drill hole in a presentation lens for rimless eyeglasses

1. A device for determining the position and/or a transverse dimension (D) of a drill hole ( 110 ) in a presentation lens ( 100 ) for rimless eyeglasses, the device comprising:

support means ( 55 ) for supporting the lens ( 100 );

capture means ( 53 ) for capturing an overall image ( 90 ) of the drill hole ( 110 ) of the lens ( 100 ) in a lighting or image capture direction (D 51 , A 52 ; A 53 ); and

processor means ( 54 ) for processing said image when the lens is carried by the support means ( 55 );

the device being characterized in that the processor means ( 54 ) are suitable for determining, using said overall image ( 90 ) of the drill hole ( 110 ), the position of the center (C 1 ) of the orifice of the drill hole ( 110 ) opening into one of the faces ( 98 ) of the lens ( 100 ) and/or the transverse dimension of said orifice of the drill hole ( 110 ) corresponding to the looked-for transverse dimension (D).

2. A device according to claim 1 , wherein the processor means ( 54 ) comprise:

means for acquiring the position of center (M 90 ) of the overall image ( 90 ) of the drill hole ( 110 ) and

first correction means that are suitable for calculating the position of center (C 1 ) of the orifice of the drill hole ( 110 ) in said face, using the position of said center (M 90 ) of the overall image ( 90 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ).

3. A device according to claim 2 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ) and that are superposed in part, one upon the other, said acquisition means comprise:

means for generating an identification-marking ring ( 60 );

means for superposing said identification-marking ring ( 60 ) onto the overall image ( 90 );

means for storing the position of center (M 60 ) of said identification-marking ring ( 60 ); and

means for associating the stored position of center (M 60 ) of said identification-marking ring ( 60 ) with the position of center (M 90 ) of the overall image ( 90 ) of the drill hole ( 110 ).

4. A device according to claim 1 , wherein the processor means ( 54 ) comprise:

means for acquiring the transverse dimension (DA) of the acquired overall image ( 90 ) of the drill hole ( 110 ); and

first correction means that are suitable for calculating the transverse dimension (D) of the orifice of the drill hole ( 110 ) in said face, using the transverse dimension (DA) of the overall image ( 90 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ).

5. A device according to claim 4 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ) and that are superposed in part, one upon the other, said acquisition means comprise:

means for generating an identification-marking ring ( 60 );

means for superposing and sizing said identification-marking ring ( 60 ) on the overall image ( 90 );

means for storing the transverse dimension (DA) of said identification-marking ring ( 60 ); and

means for associating the stored transverse dimension (DA) of said identification-marking ring ( 60 ) with the transverse dimension (DA) of the overall image ( 90 ) of the drill hole ( 110 ).

6. A device according to claim 2 , wherein said first correction means also operate as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

7. A device according to claim 1 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ) and that are superposed in part, one upon the other, the processor means ( 54 ) comprise:

means for acquiring the center (MC 1 ) of the image ring ( 40 ) formed by the image of the orifice of the drill hole ( 110 ) opening into said face ( 98 ); and

means for defining, with or without correction, the position of center (C 1 ) of the orifice of the drill hole ( 110 ) opening into said face ( 98 ), as a function of the position of center (MC 1 ) of said image ring ( 40 ).

8. A device according to claim 7 , wherein said means for defining the position of the center (C 1 ) of the orifice of the drill hole ( 110 ) opening into said face ( 98 ) calculate the first correction as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

9. A device according to claim 1 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ), and that are superposed, one upon the other, the processor means ( 54 ) comprise:

means for acquiring the transverse dimension (D 40 ) of the image ring ( 40 ) formed by the image of the orifice of the drill hole ( 110 ) opening into said face ( 98 ); and

first correction means that are suitable for using the transverse dimension (D 40 ) of said image ring ( 40 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ) to calculate the transverse dimension (D) of the orifice of the drill hole ( 110 ) opening into said face.

10. A device according to claim 9 , wherein said first correction means operate in addition as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

11. A device according to claim 1 , wherein the processor means ( 54 ) are suitable for using the overall image ( 90 ) of the drill hole ( 110 ) to determine a relative distance in projection, between the center (C 1 ) of the orifice of the drill hole ( 110 ) of the presentation lens ( 100 ) and the edge of the presentation lens ( 100 ), in projection along said lighting or image capture direction in an acquisition plane substantially perpendicular to said lighting or image capture direction.

12. A device according to claim 11 , wherein the processor means ( 54 ) comprise second correction means that are suitable for using the relative distance in projection and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ), to calculate a real relative distance between the center (C 1 ) of the orifice and the edge of the presentation lens ( 100 ), considered in the plane perpendicular to the axis (A 110 ) of the drill hole ( 110 ).

13. A device according to claim 2 , wherein the processor means ( 54 ) comprise:

means for acquiring the transverse dimension (DA) of the acquired overall image ( 90 ) of the drill hole ( 110 ); and

first correction means that are suitable for calculating the transverse dimension (D) of the orifice of the drill hole ( 110 ) in said face, using the transverse dimension (DA) of the overall image ( 90 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ).

14. A device according to claim 3 , wherein said first correction means also operate as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

15. A device according to claim 4 , wherein said first correction means also operate as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

16. A device according to claim 5 , wherein said first correction means also operate as a function of the refractive index ( n ) and/or of the thickness (E) of the presentation lens ( 100 ).

17. A device according to claim 7 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ), and that are superposed, one upon the other, the processor means ( 54 ) comprise:

means for acquiring the transverse dimension (D 40 ) of the image ring ( 40 ) formed by the image of the orifice of the drill hole ( 110 ) opening into said face ( 98 ); and

first correction means that are suitable for using the transverse dimension (D 40 ) of said image ring ( 40 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ) to calculate the transverse dimension (D) of the orifice of the drill hole ( 110 ) opening into said face.

18. A device according to claim 8 , wherein, for the overall image ( 90 ) comprising first and second image rings ( 40 , 41 ) that are formed on the capture means ( 53 ) by the images of the orifices ( 111 , 112 ) of the drill hole ( 110 ), and that are superposed, one upon the other, the processor means ( 54 ) comprise:

means for acquiring the transverse dimension (D 40 ) of the image ring ( 40 ) formed by the image of the orifice of the drill hole ( 110 ) opening into said face ( 98 ); and

first correction means that are suitable for using the transverse dimension (D 40 ) of said image ring ( 40 ) and data representative of the angle of inclination (ALPHA) of the drill hole ( 110 ) formed between the lighting or image capture direction (D 51 , A 52 ; A 53 ) and the axis (A 110 ) of the drill hole ( 110 ) to calculate the transverse dimension (D) of the orifice of the drill hole ( 110 ) opening into said face.

19. A device according to claim 2 , wherein the processor means ( 54 ) are suitable for using the overall image ( 90 ) of the drill hole ( 110 ) to determine a relative distance in projection, between the center (C 1 ) of the orifice of the drill hole ( 110 ) of the presentation lens ( 100 ) and the edge of the presentation lens ( 100 ), in projection along said lighting or image capture direction in an acquisition plane substantially perpendicular to said lighting or image capture direction.