Method of manufacturing an ophthalmic lens for providing an optical display
View Patent ↗The invention relates to a method of manufacturing a vision correction lens that has a front face and a rear face, and into which light beams emitted by an optical element of a light beam generator system are introduced via an entry surface and directed towards the eye of the wearer to enable information content to be viewed, said light beams being reflected a plurality of times between two “reflection” faces between being introduced into the lens and exiting therefrom, said two reflection faces being faces of a transparent optical insert constituted by a light guide. According to the invention, said insert is completely contained within the lens.
1. A method of manufacturing a vision-correction lens that has a front face and a rear face, and into which light beams emitted by an optical element of a light beam generator system are introduced via an entry surface and directed towards the eye of the wearer to enable information content to be viewed, said light beams being reflected a plurality of times between two “reflection” faces between being introduced into the lens and exiting therefrom, said two reflection faces being faces of a transparent optical insert constructed with a light guide, said method comprising the step of placing said insert in said lens while it is being molded in a mold having a first mold portion for molding said front face, and a second mold portion for molding said rear face, and the insert is completely contained within the lens wherein said entry surface is formed by making a molded cavity in the lens, said entry surface constituting the bottom of said cavity and wherein said cavity is molded by means of a stud secured to the second mold portion and said insert is temporarily secured to said stud prior to molding.
2. A method according to claim 1 , wherein said stud is placed on a lateral edge of said second portion.
3. A method according to claim 1 , wherein said lens is obtained by molding a monomer.
4. A method according to claim 1 , wherein said insert is secured temporarily to said stud prior to molding by means of a layer of said monomer.
5. A method according claim 1 , wherein said second mold portion includes micromarking for positioning and identification purposes.
6. A finished lens ready for positioning on a frame, and obtained by means of the method according to claim 1 .
7. A lens blank, requiring at least one treatment in order to be usable, obtained by means of the method according to claim 1 .
8. An ophthalmic display including a correction lens according to claim 6 .
9. An ophthalmic display including a correction lens according to claim 7 .