Method for manufacturing of optical element, optical element thus obtained

Abstract

The present invention relates to a method for the manufacturing of an optical element having a refractive index above 1.59 by additive manufacturing to the optical element obtained by such a method and to an ophthalmic lens comprising such an optical element.

Description

technical field

[0001] The invention belongs to the field of optical devices, especially the field of manufacturing optical elements with high refractive index (greater than 1.59).

[0002] More specifically, the present invention relates to a method for manufacturing optical elements having a refractive index greater than 1.59 by additive manufacturing, to optical elements obtained by such a method, and to an ophthalmic lens comprising such an optical element . Background technique

[0003] In the ophthalmic industry, it is desirable to obtain high index polymers (ie, greater than 1.59) to reduce the thickness of prescription lenses when high diopter corrections are required.

[0004] Prescription plastic lenses exhibiting a high index of refraction are typically manufactured by a casting process that involves a very long polymerization cycle of pouring a liquid monomer mixture into a mold and hardening to produce a solid polymeric material. In particular, after filling w...

Examples

example

[0080] 1. Chemicals used

[0081] Optical materials were prepared by:

[0082] - a first composition comprising 50.6 g of diisocyanatonorbornane (CAS No. 74091-64-8) as compound C1, 1.8 g of Seesorb 701 (CAS No. 2440-22-4) as thermal catalyst ) and 0.04 g of dimethyltin dichloride (CAS No. 753-73-1); - a second composition comprising 23.9 g of pentaerythritol tetrakis(3-mercaptopropionate) (CAS No. 7575-23-7) and 25.3 g of 2,3-bis((2-mercaptoethyl)thio)-1-propanethiol (CAS No. 131538-00-6); and

[0083] - 2 g of 9-anthrylmethyl N,N-diethylcarbamate methyl (CAS No. 1228312-05-7) dissolved in 2 g of ethyl acetate as photobase generator.

[0084] 2. Preparation of Optical Components

[0085] Optical elements are built on PMMA substrates by stacking multiple flat layers with different diameters, resulting in plano-convex structures.

[0086] High-end inkjet printers are used to precisely control droplet placement.

[0087] The first composition, the second composition and the...

technical field

[0001] The invention belongs to the field of optical devices, especially the field of manufacturing optical elements with high refractive index (greater than 1.59).

[0002] More specifically, the present invention relates to a method for manufacturing optical elements having a refractive index greater than 1.59 by additive manufacturing, to optical elements obtained by such a method, and to an ophthalmic lens comprising such an optical element . Background technique

[0003] In the ophthalmic industry, it is desirable to obtain high index polymers (ie, greater than 1.59) to reduce the thickness of prescription lenses when high diopter corrections are required.

[0004] Prescription plastic lenses exhibiting a high index of refraction are typically manufactured by a casting process that involves a very long polymerization cycle of pouring a liquid monomer mixture into a mold and hardening to produce a solid polymeric material. In particular, after filling w...

Examples

example

[0080] 1. Chemicals used

[0081] Optical materials were prepared by:

[0082] - a first composition comprising 50.6 g of diisocyanatonorbornane (CAS No. 74091-64-8) as compound C1, 1.8 g of Seesorb 701 (CAS No. 2440-22-4) as thermal catalyst ) and 0.04 g of dimethyltin dichloride (CAS No. 753-73-1); - a second composition comprising 23.9 g of pentaerythritol tetrakis(3-mercaptopropionate) (CAS No. 7575-23-7) and 25.3 g of 2,3-bis((2-mercaptoethyl)thio)-1-propanethiol (CAS No. 131538-00-6); and

[0083] - 2 g of 9-anthrylmethyl N,N-diethylcarbamate methyl (CAS No. 1228312-05-7) dissolved in 2 g of ethyl acetate as photobase generator.

[0084] 2. Preparation of Optical Components

[0085] Optical elements are built on PMMA substrates by stacking multiple flat layers with different diameters, resulting in plano-convex structures.

[0086] High-end inkjet printers are used to precisely control droplet placement.

[0087] The first composition, the second composition and the...

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