Method of preparing an operation of surfacing of a lens blank

An apparatus (APP) of preparing an operation of surfacing of a lens blank (BLA) to transform the lens blank into a generated lens (GEN), the generated lens having a predetermined prism (P) corresponding to an inclination between a front surface and a back surface of the generated lens at least locally, the apparatus comprising a processing module (PROCESS) configured to:

• for a plurality of devices destined to interact with the lens blank during the operation of surfacing to define the predetermined prism of the generated lens, attribute a priority order (PO) to each device of said plurality of devices,
• based on said priority order, attribute to each of the plurality of devices a prism portion (P1, P2, P3) which comprised in a respective range delimited by a respective minimum prism portion (L1, L2, L3) and a respective maximum prism portion (M1, M2, M3), said prism portion being representative of the contribution of the corresponding device to the prism of the generated lens, for further interaction of each device with the lens blank during the operation of surfacing to obtain, based on the prism portions, the generated lens having said predetermined prism,
• wherein the prism portions respectively attributed to each device of the plurality of devices are determined such that the prism portion attributed to the device with the lowest priority order is maximized, and the prism portion attributed to device with highest priority order is minimized.

A non-transitory computer-readable medium on which is stored a computer program comprising instructions which, when executed by a processor (PROC), causes the processor to perform a method of preparing an operation of surfacing of a lens blank (BLA) to transform the lens blank into a generated lens (LEN), the generated lens having a predetermined prism (P) corresponding to an inclination between a front surface (FRONT) and a back surface (BACK) of the generated lens at least locally, the method being implemented using a processing module (PROCESS) and comprising:

• for a plurality of devices destined to interact with the lens blank during the operation of surfacing to manufacture the predetermined prism of the generated lens, attributing a priority order (PO) to each device of said plurality of devices,
• based on said priority order, attributing to each of the plurality of devices a prism portion (P1, P2, P3) which is zero or is comprised in a respective range delimited by a respective minimum prism portion (L1, L2, L3) and a respective maximum prism portion (M1, M2, M3), said prism portion being representative of the contribution of the corresponding device to the prism of the generated lens, for further interaction of each device with the lens blank during the operation of surfacing to obtain, based on the prism portions, the generated lens having finally said predetermined prism,
• wherein the prism portions respectively attributed to each device of the plurality of devices are determined such that the prism portion attributed to the device with the lowest priority order is maximized, and the prism portion attributed to device with highest priority order is minimized.