System and method for low-stress optical lens using a 3D-print correction technique
A corrected optical lens includes an inner layer that includes a low stress optical lens and an outer layer that includes one or more corrective layers. The outer layer may be formed on at least a portion of an outer surface of the inner layer by scanning the outer surface of the inner layer, generating a surface characterization file based on the outer surface scan, and 3D printing the one or more corrective layers on the outer surface of the inner layer based on the surface characterization file as input to a 3D printer. The surface characterization file may be corrected based on a particular predetermined contour of the inner layer prior to being input to the 3D printer. The correction may include, for example, reduction of root mean square (RMS) values of deviations of detected peaks and valleys on the surface of the inner layer.
1 . An optical lens, comprising:
an inner layer, wherein the inner layer comprises a low stress optical lens; and
an outer layer comprising one or more corrective layers, wherein the outer layer is formed on at least a portion of an outer surface of the inner layer using a three-dimensional (3D) printing technique, wherein:
the outer surface of the inner layer scanned to identify at least one surface imperfection on the outer surface with respect to a particular predetermined contour of the inner layer;
a surface characterization file is generated based on the outer surface scan that includes a correction to the at least one surface imperfection based on the particular predetermined contour of the inner layer; and
the one or more corrective layers are printed, using a 3D printer, on the outer surface of the inner layer to correct the at least one surface imperfection and form the particular predetermined contour based on the correction in the surface characterization file as input to the 3D printer.
2 . The optical lens of claim 1 , wherein the surface characterization file is corrected via reduction of root mean square (RMS) values of deviations of detected peaks and valleys on the outer surface of the inner layer.
3 . The optical lens of claim 2 , wherein the reduction of the root mean square (RMS) values is to less than 5 micrometers.
4 . The optical lens of claim 1 , wherein the outer surface of the inner layer is scanned by a 3D scanner using one or more of visible, infrared, or laser light.
5 . The optical lens of claim 1 , wherein the outer layer has a thickness in a range from 25 micrometers to 100 micrometers.
6 . The optical lens of claim 1 , wherein each of the one or more corrective layers has a thickness in a range from less than 1 micrometer to 10 micrometers.
7 . The optical lens of claim 1 , wherein the 3D printer is an inkjet type 3D printer arranged to provide picoliter size droplets.
8 . The optical lens of claim 1 , wherein the one or more corrective layers are formed using poly-methyl-methacrylate (PMMA), cyclic-olefin-copolymer (COC), cyclo-olefin-polymer (COP), monomer plastic, polymer plastic, polycarbonate (PC), or optical nylon.
9 . A method to form a corrected optical lens, the method comprising:
receiving an inner layer, wherein the inner layer comprises a low stress optical lens; and
forming an outer layer comprising one or more corrective layers on an outer surface of the inner layer by:
scanning the outer surface of the inner layer to identify at least one surface imperfection on the outer surface with respect to a particular predetermined contour of the inner layer;
generating a surface characterization file based on the outer surface scan that includes a correction to the at least one surface imperfection based on the particular predetermined contour of the inner layer; and
forming the one or more corrective layers on the outer surface of the inner layer via three-dimensional (3D) printing to correct the at least one surface imperfection and form the particular predetermined contour based on the correction in the surface characterization file as input to a 3D printer.
10 . The method of claim 9 , wherein correcting the surface characterization file comprises:
reducing root mean square (RMS) values of deviations of detected peaks and valleys on the outer surface of the inner layer to less than 5 micrometers.
11 . The method of claim 9 , wherein receiving the inner layer comprises:
receiving an optical lens produced via one or more of casting, injection molding, compression molding, machining, polishing, or a combination thereof.
12 . The method of claim 9 , wherein scanning the outer surface of the inner layer comprises:
scanning the outer surface of the inner layer by a 3D scanner using one or more of visible, infrared, or laser light.
13 . A system to form a corrected optical lens, the system comprising:
a lens generator to provide an inner layer comprising a low stress optical lens;
a three-dimensional (3D) scanner to scan an outer surface of the inner layer to identify at least one surface imperfection on the outer surface with respect to a particular predetermined contour of the inner layer;
a 3D printer to form an outer layer by 3D printing one or more corrective layers on at least a portion of an outer surface of the inner layer to correct the at least one surface imperfection and form the particular predetermined contour; and
a controller communicatively coupled to the lens generator, the 3D scanner, and the 3D printer, the controller to:
generate a surface characterization file based on the outer surface scan that includes a correction to the at least one surface imperfection based on the particular predetermined contour of the inner layer; and
provide the surface characterization file as input to the 3D printer for printing the one or more corrective layers.
14 . The system of claim 13 , wherein controller is to correct the surface characterization file via reduction of root mean square (RMS) values of deviations of detected peaks and valleys on the outer surface of the inner layer to less than 5 micrometers.
15 . The system of claim 13 , wherein the 3D scanner employs one or more of visible, infrared, or laser light.
16 . The system of claim 13 , wherein:
the outer layer has a thickness in a range from 25 micrometers to 100 micrometers; and
each of the one or more corrective layers has a thickness in a range from less than 1 micrometer to 10 micrometers.
17 . The system of claim 13 , wherein the 3D printer is to print the one or more corrective layers using poly-methyl-methacrylate (PMMA), cyclic-olefin-copolymer (COC), cyclo-olefin-polymer (COP), monomer plastic, polymer plastic, polycarbonate (PC), or optical nylon.
18 . The optical lens of claim 1 , wherein the one or more corrective layers has a matching refractive index with the inner layer.
19 . The method of claim 9 , wherein the one or more corrective layers has a matching refractive index with the inner layer.
20 . The system of claim 13 , wherein the one or more corrective layers has a matching refractive index with the inner layer.