Method for sublimation coating on optical lens

A method for dual coating of a first surface and a second surface of an optical lens via sublimation, the steps comprising:

• printing a first coating and a second coating using a sublimation transfer ink onto first and second sublimation papers respectively;
• positioning the first sublimation paper onto the first surface the optical lens such that the first coating is aligned to the first surface of the optical lens;
• placing the first sublimation paper onto the first surface of the optical lens and securing the first sublimation paper onto the first surface of the optical lens;
• positioning the second sublimation paper onto the second surface of the optical lens such that the second coating is aligned to the second surface of the optical lens;
• placing the second sublimation paper onto the second surface of the optical lens and securing the second sublimation paper onto the second surface of the optical lens;
• placing the optical lens on top of a mold that substantially corresponds to the second surface of the optical lens such that the first surface of the optical lens faces upwards;
• preheating a chamber of the vacuum oven to a predetermined temperature between 68° C. and 189° C.;
• placing the optical lens and the mold into the chamber of the vacuum oven such that the first surface of the optical lens faces upwards;
• closing the vacuum oven and setting a predetermined duration between 2 minutes and 12 minutes to heat the optical lens;
• heating and vacuuming the chamber of the vacuum oven during the predetermined duration to permit the first coating and the second coating to transfer onto the first surface and the second surface of optical lens respectively via sublimation;
• removing from the vacuum oven the mold and the optical lens, wherein the first surface and the second surface of the optical lens have the first and second coatings sublimated onto the first surface and the second surface of the optical lens respectively;
• separating the optical lens from the mold;
• and
• cooling the optical lens,
• wherein the first surface of the optical lens is concave,
• wherein the second surface of the optical lens is convex,
• wherein an edge of the first surface of the optical lens has a plurality of recesses,
• wherein the optical lens is a finished lens.

A method of sublimating a first coating onto an optical lens having a first and second surfaces, the method comprising the steps of:

• printing a first coating using a sublimation transfer ink onto a sublimation paper;
• positioning the sublimation paper onto the optical lens such that the first coating printed on the sublimation paper is aligned to the first surface of the optical lens;
• placing the sublimation paper onto the first surface of the optical lens and securing the sublimation paper onto the first surface of the optical lens;
• preheating a chamber of a vacuum oven to a predetermined temperature between 68° C. and 189° C.;
• placing the optical lens into the chamber of the vacuum oven with the first surface of the optical lens facing upward;
• closing the vacuum oven and setting a predetermined time between 2 minutes and 16 minutes for heating;
• heating and vacuuming the chamber of the vacuum oven during about the predetermined time such that the first coating sublimates onto the first surface of the optical lens from the sublimation paper;
• removing from the vacuum oven the optical lens having the first coating on the first surface of the optical lens;
• and
• cooling the optical lens,
• wherein the first surface of the optical lens is concave,
• wherein an edge of the first surface of the optical lens has a plurality of recesses,
• wherein the optical lens is a semifinished lens.