Methods and devices for determining the position and/or orientation of a spectacle lens on a mounting

A method for determining at least one of a position or an orientation of a spectacle lens mounted on a holder, the spectacle lens having a permanent mark, the method comprising:

• mounting the spectacle lens on the holder, wherein the at least one of the position or the orientation of the spectacle lens relative to the holder is unknown;
• detecting an apparent location of the permanent mark on the spectacle lens from a plurality of observation directions, the apparent location of the permanent mark being different from a real location of the permanent mark on account of light refraction by the spectacle lens;
• illuminating the spectacle lens with an eccentric light source;
• detecting a location of at least one reflection of the eccentric light source on the spectacle lens;
• and
• determining the at least one of the position or the orientation of the spectacle lens in the unknown position and/or orientation relative to the holder on a basis of the apparent location of the permanent mark determined from the plurality of observation directions and mark-independent additional information,
• wherein the real location of the permanent mark and the location of the at least one reflection are on opposite sides of the spectacle lens.

A device for determining at least one of a position or an orientation of a spectacle lens mounted on a holder, the spectacle lens having a permanent mark, the device comprising:

• a providing unit configured to provide a detected apparent location of the permanent mark on the spectacle lens;
• a computing unit configured to determine the at least one of the position or the orientation of the spectacle lens on a basis of the apparent location of the permanent mark and mark-independent additional information, the apparent location of the permanent mark being different from a real location of the permanent mark on account of light refraction by the spectacle lens;
• at least one light source being arranged eccentrically with respect to an optical axis of a camera to eccentrically illuminate the spectacle lens;
• and
• the camera having the optical axis and being configured to detect the apparent location of the permanent mark on the spectacle lens and to detect a location of at least one reflection of the at least one light source on the spectacle lens,
• wherein the mark-independent additional information includes the location of the at least one reflection,
• wherein the real location of the permanent mark and the location of the at least one reflection are on opposite sides of the spectacle lens, and
• wherein determining the at least one of the position or the orientation of the spectacle lens includes detecting the location of the at least one reflection of the at least one light source on the spectacle lens within a region of the spectacle lens, the region of the spectacle lens being smaller than an entire surface of the spectacle lens.

A device for determining at least one of a position or an orientation of a spectacle lens mounted on a holder, the spectacle lens having a permanent mark, the device comprising:

• a providing unit configured to provide the detected apparent location of the permanent mark on the spectacle lens from a camera having an optical axis, the apparent location of the permanent mark being different from a real location of the permanent mark on account of light refraction by the spectacle lens;
• at least one light source being arranged eccentrically with respect to the optical axis of the camera to eccentrically illuminate the spectacle lens,
• a computing unit configured to determine the at least one of the position or the orientation of the spectacle lens on a basis of the apparent location of the permanent mark and mark-independent additional information,
• wherein the camera having the optical axis is configured to detect the apparent location of the permanent mark from a plurality of observation directions,
• wherein the camera is further configured to detect a location of at least one reflection of the at least one light source on the spectacle lens,
• wherein the real location of the permanent mark and the location of the at least one reflection are on opposite sides of the spectacle lens,
• wherein the location of the at least one reflection is on the side of the spectacle lens facing the camera, and
• wherein the at least one of the position or the orientation of the spectacle lens relative to the holder is unknown during the detecting of the apparent location of the permanent mark on the spectacle lens from the plurality of observation directions and the detecting the location of the at least one reflection of the at least one light source on the spectacle lens.

A device for determining at least one of a position or an orientation of a spectacle lens mounted on a holder, the spectacle lens having a permanent mark, the device comprising:

• a providing unit configured to provide a detected apparent location of the permanent mark on the spectacle lens, the detected apparent location of the permanent mark being different from a real location of the permanent mark on account of light refraction by the spectacle lens;
• a computing unit configured to determine the at least one of the position or the orientation of the spectacle lens on a basis of the apparent location of the permanent mark and mark-independent additional information,
• wherein the computing unit is configured to determine the at least one of the position or the orientation of the spectacle lens on a basis of an iterative calculation of the at least one of the position or the orientation,
• wherein the computing unit is configured to carry out the iterative calculation on a basis of a holding characteristic and the detected apparent location of the permanent mark,
• wherein the holding characteristic is determined in advance,
• wherein the holding characteristic determined in advance is stored in a memory or retrievable from a server via a communication network, and
• wherein determining the at least one of the position or the orientation of the spectacle lens includes determining whether the spectacle lens is at least one of tilted, rotated, or decentered relative to the holder;
• and
• a stamping device configured to provide a stamping figure on the side opposite of the permanent marking of the spectacle lens in the detected position and/or orientation based on the detected apparent location of the permanent marking.

A device for determining at least one of a position or an orientation of a spectacle lens mounted on a holder, the spectacle lens having a permanent mark, the device comprising:

• a providing unit configured to provide a detected apparent location of the permanent mark on the spectacle lens, the apparent location of the permanent mark being different from a real location of the permanent mark on account of light refraction by the spectacle lens;
• a computing unit configured to determine the at least one of the position or the orientation of the spectacle lens on a basis of the apparent location of the permanent mark and mark-independent additional information;
• and
• a holder, wherein the holder is configured to releasably attach the spectacle lens,
• wherein the mark-independent additional information includes a characterization of the attachment of the lens on the holder,
• wherein a surface of the lens attached to the holder is approximated locally, and
• wherein determining the at least one of the position or the orientation of the spectacle lens includes determining whether the spectacle lens is at least one of tilted, rotated, or decentered relative to the holder;
• and
• a stamping device configured to provide a stamping figure on the side opposite of the permanent marking of the spectacle lens in the detected position and/or orientation based on the detected apparent location of the permanent marking.