Stack of sterile peelable lenses with low creep

A method of manufacturing a stack of peelable lenses to have a target peel strength, the method comprising:

• coating a first lens with a first adhesive coating;
• heating the first adhesive coating to evaporate at least some solvent of the first adhesive coating and to initiate curing of the first adhesive coating;
• after said heating the first adhesive coating, exposing the first adhesive coating to ultraviolet light to continue curing of the first adhesive coating;
• after said exposing the first adhesive coating to ultraviolet light, laminating a second lens onto a surface of the first adhesive coating to produce a first stack of lenses;
• coating a third lens with a third adhesive coating;
• heating the third adhesive coating to evaporate at least some solvent of the third adhesive coating and to initiate curing of the third adhesive coating;
• after said heating the third adhesive coating, exposing the third adhesive coating to ultraviolet light to continue curing of the third adhesive coating;
• after said exposing the third adhesive coating to ultraviolet light, laminating a fourth lens onto a surface of the third adhesive coating to produce a second stack of lenses;
• coating the second lens with a second adhesive coating;
• heating the second adhesive coating to evaporate at least some solvent of the second adhesive coating and to initiate curing of the second adhesive coating;
• after said heating the second adhesive coating, exposing the second adhesive coating to ultraviolet light to continue curing of the second adhesive coating, wherein parameters of the heating and the exposing of the first, second, and third adhesive coatings are selected such that the first, second, and third adhesive coatings are only partially cured to result in respective peel strengths that are less than respective target peel strengths;
• after said exposing the second adhesive coating to ultraviolet light, laminating the second stack of lenses onto a surface of the second adhesive coating to produce a combined stack of lenses from the first and second stacks of lenses;
• and
• exposing the combined stack of lenses to an electron beam to sterilize the combined stack of lenses and to continue curing of the first adhesive coating, the second adhesive coating, and the third adhesive coating.

A method of manufacturing a stack of peelable lenses, the method comprising:

• producing a first stack of lenses, said producing the first stack including:
• providing a lens, the lens initially defining an outermost lens of the first stack;
• and
• performing the following sequence of steps one or more times:
• coating the outermost lens of the first stack with an adhesive coating;
• heating the adhesive coating to evaporate at least some solvent of the adhesive coating and to initiate curing of the adhesive coating;
• exposing the adhesive coating to ultraviolet light to continue curing of the adhesive coating;
• and
• laminating an additional lens onto a surface of the adhesive coating, the additional lens redefining the outermost lens of the first stack;
• producing a second stack of lenses, said producing the second stack including:
• providing a lens, the lens initially defining an outermost lens of the second stack;
• and
• performing the following sequence of steps one or more times:
• coating the outermost lens of the second stack with an adhesive coating;
• heating the adhesive coating to evaporate at least some solvent of the adhesive coating and to initiate curing of the adhesive coating;
• exposing the adhesive coating to ultraviolet light to continue curing of the adhesive coating;
• and
• laminating an additional lens onto a surface of the adhesive coating, the additional lens redefining the outermost lens of the second stack;
• coating the outermost lens of the first stack with an adhesive coating;
• heating the adhesive coating that is coated on the outermost lens of the first stack to evaporate at least some solvent of the adhesive coating and to initiate curing of the adhesive coating;
• after said heating the adhesive coating that is coated on the outermost lens of the first stack, exposing the adhesive coating to ultraviolet light to continue curing of the adhesive coating, wherein parameters of the heating and the exposing of the adhesive coatings are selected such that the adhesive coatings are only partially cured to result in respective peel strengths that are less than respective target peel strengths;
• after said exposing the adhesive coating that is coated on the outermost lens of the first stack, laminating the second stack of lenses onto a surface of the adhesive coating to combine the first and second stacks into a combined stack of lenses;
• and
• exposing the combined stack of lenses to an electron beam to sterilize the combined stack of lenses and to continue curing of the adhesive coatings contained within the combined stack of lenses.