Lens Mold Patents (Class 425/808)
  • Patent number: 9914272
    Abstract: There is described a method of separating excess lens forming material from a molded ophthalmic lens, in particular a contact lens. After polymerization and/or cross-linking of a lens forming material (P) within a mold cavity (4) of a mold (1) comprising female and male mold halves (2, 3) to form an ophthalmic lens non-polymerized and/or non-cross-linked lens forming material is flushed away from the mold halves (2, 3) with a jet of a fluid flushing medium, such as, e.g., water or a solvent or an inert gas. Subsequently the molded lens is dried. In accordance with the invention the flushing is accomplished with the mold halves (2, 3) still in the closed position. There is also described an apparatus for carrying out the method.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: March 13, 2018
    Assignee: Novartis AG
    Inventors: Axel Heinrich, Bernhard Seiferling, Peter Hagmann
  • Patent number: 9004892
    Abstract: An optical lens mold includes a mold body, a magnetic fluid, a plurality of thermocouples, a plurality of electromagnets, a controlling unit and a power source. The mold body defines a plurality of injection chambers and a cooling channel surrounding the plurality of injection chambers. The magnetic fluid contains magnetic particles and flows in the cooling channel. The thermocouples are capable of sensing temperatures of the plurality of injection chambers correspondingly. The electromagnets are positioned above the cooling channel corresponding to the plurality of thermocouples. The plurality of thermocouples and the plurality of electromagnets are connected to the controlling unit via the power source, the controlling unit is capable of the comparing the standard temperature value with temperature values sensed by the plurality of thermocouples, and maintaining the temperature of the plurality of injection chambers in a normal state.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: April 14, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chien-Chun Wang
  • Patent number: 8945438
    Abstract: A metal mold including: a first inner metal mold which forms a first lens surface and a first flat surface portion of a lens; a first outer metal mold which forms a second flat surface portion; a second inner metal mold which forms a second lens surface and a third flat surface portion; and a second outer metal mold which forms a fourth flat surface portion, and wherein a first protruded portion which forms a first concaved portion on the lens is formed all around an outer periphery of the first inner metal mold, the first concaved portion serving as clearance for a burr, and a second protruded portion which forms a second concaved portion on the lens is formed all around an outer periphery of the second inner metal mold, the second concaved portion serving as clearance for a burr.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: February 3, 2015
    Assignee: Hoya Corporation
    Inventors: Shungo Hanashiro, Akihiro Sugiyama, Hiroshi Kanazawa
  • Patent number: 8926312
    Abstract: A detachable threaded rod is used in an injection mold, and includes an operation portion, a molding portion, and a screw. The operation portion includes a rod part, the rod part defines a mating hole and a screw hole on a bottom surface of the mating hole. The molding portion includes a front end, a rear end, and a side surface connected between the front end and the rear end. The molding portion defines a cavity on a front end. The molding portion includes a mating portion extending from the rear end and received in the mating hole. The mating portion defines a through hole communicating with the cavity. The molding portion defines external threads on the side surface. The screw penetrates the through hole and screwing in the screw hole, the operation portion is fixed with the molding portion by the screw.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: January 6, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Min-Tsang Tseng
  • Patent number: 8916233
    Abstract: Methods and apparatuses for coating at least a portion of a curved surface of a lens with a polarizing liquid are disclosed throughout the specification. For example, there is provided a method comprising providing a lens having a curved surface, and applying a polarizing liquid to at least a portion of the curved surface by shear flow with a flexible apparatus. Other methods are included. Apparatuses include ophthalmic lenses having polarized coatings formed according to any of the disclosed methods.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: December 23, 2014
    Assignee: Essilor International (Compagnie Generale d'Optique)
    Inventors: Herbert Mosse, Richard Muisener
  • Patent number: 8905745
    Abstract: A mold core includes first and second main bodies and an adjustment assembly. The first main body includes a front surface, a rear surface opposite to the front surface, and a receiving cavity passing through the front and rear surfaces. The front surface defines two first cavities at opposite sides of the receiving cavity. A connection line of centers of the first cavities intersects with a symmetry axis of the first cavities to form a first intersection point. The second main body includes a forming surface defining second cavities. A connection line of centers of the molding cavities intersects with a symmetry axis of the second cavities to form a second intersection point. The forming surface is coplanar with the front surface. The adjustment assembly abuts the first and the second main bodies to compensate an offset between the first and second intersection points to satisfy a predetermined range.
    Type: Grant
    Filed: April 7, 2013
    Date of Patent: December 9, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chang-Wei Kuo
  • Patent number: 8899547
    Abstract: The present invention encompasses, in part, a method and apparatus for lens casting in which two molds, preferably formed of plastic, are interconnected or joined together via a ring to form a mold cavity having substantially the same dimensions of the lens to be formed therein. The invention is further directed to compositions and methods used in lens casting. In a first implementation the invention includes a mold having a ring having an interior periphery; a front mold formed of a plastic and having a lens-forming surface, an edge circumscribing the lens-forming surface that is sized to be complementarily received within a portion of the interior periphery of the ring, and a base having dimensions greater than the interior periphery; and a rear mold formed of a plastic and having a lens-forming surface.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: December 2, 2014
    Assignee: QSpex Technologies, Inc.
    Inventors: Kai Su, Debbie Makita
  • Patent number: 8824035
    Abstract: A molded plastic part prepared by injecting a resin in a cavity of a die so that a pressure is generated in the resin in the cavity and at least one transfer wall surface of the cavity is transferred to the resin. The plastic part has at least one transferred surface; at least one imperfectly transferred concave portion on a first surface thereof other than the transferred surface; and at least one imperfectly transferred convex portion on the first surface or a second surface thereof other than the transferred surface. The ratio (a)/(b) of the thickness (a) of the plastic part in a direction perpendicular to the transferred surface to the thickness (b) of the plastic part in a direction parallel to the transferred surface is less than 1.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: September 2, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Takamichi Ohhashi, Yasuo Yamanaka, Akio Hirano, Eiichi Hayashi, Go Takahashi, Kan Aoki
  • Patent number: 8790104
    Abstract: An optical wavefront correction plate incorporates a unique, three-dimensional spatial retardation distribution utilizing the index of refraction change of resin mixture in its cured state. The optical wave plate comprises a pair of transparent plates, containing a layer of a monomers and polymerization initiators, such as resin mixture. This resin mixture exhibits a variable index of refraction as a function of the extent of its curing. Curing of the resin mixture may be made by exposure to light, such as ultraviolet light, and may be varied across and through the surface of the resin mixture to create a particular and unique three-dimensional wavefront retardation profile. The optical wave plate provides improved performance in large area mirrors, lenses, telescopes, microscopes, and ophthalmic diagnostic systems.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 29, 2014
    Assignee: Essilor International (Compagnie Generale d'Optique
    Inventor: Shui T. Lai
  • Patent number: 8749863
    Abstract: A plastic article is formable by using a metal die having a cavity to accommodate melted resin therein at a given pressure. The plastic article includes a transfer face to which is transferred a face shape of the metal die, a projection disposed at least one face other than the transfer face, an incomplete transfer face having a concave shape disposed at the same face on which the projection is disposed, formed by an incomplete transfer of a face shape of the cavity of the metal die, and an incomplete transfer face having a convex shape disposed at least one face other than the transfer face.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 10, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Takamichi Ohhashi, Yasuo Yamanaka, Eiichi Hayashi, Go Takahashi
  • Patent number: 8721932
    Abstract: The gauge lens with anti-fog includes a substantially planar transparent lens substrate having an outer surface and an inner surface and a thin film possessing anti-fog properties adjacent and substantially covering the inner surface of the lens substrate to provide a low angle of contact for water and moisture. The anti-fog film is bonded to the lens substrate during the molding process that produces the lens substrate shape. The anti-fog film comprises a hydrophilic material or is coated with a hydrophilic coating. In addition to the anti-fog film, in another embodiment, the outer surface of the lens substrate has a hard coat film adjacent and substantially covering the outer surface of said lens. The materials for the lens substrate, anti-fog film, and hard coat film are selected based on the application, performance, and stability of the gauge lens in the environment that it is operated.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 13, 2014
    Assignee: Flextronics Automotive Inc.
    Inventor: Brian Sneek
  • Patent number: 8715541
    Abstract: Described herein are devices for producing ophthalmic lenses including at least one mold half defining an optical surface where the mold half is made from a polymer that includes an aromatic polyimide, a polyphenylene, or a combination thereof. The devices exhibit numerous advantages including, but not limited to, good chemical resistance, durability, machineability, and UV absorbing properties. Also described are methods for producing ophthalmic lenses using the devices described herein. The ophthalmic lenses produced with the devices described herein exhibit excellent optical properties when compared to lenses produced from conventions molds.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: May 6, 2014
    Assignee: Novartis AG
    Inventor: Alice Weimin Liu
  • Patent number: 8673187
    Abstract: There is described a method of separating excess lens forming material from a molded ophthalmic lens, in particular a contact lens. After polymerization and/or cross-linking of a lens forming material (P) within a mold cavity (4) of a mold (1) comprising female and male mold halves (2, 3) to form an ophthalmic lens non-polymerized and/or non-cross-linked lens forming material is flushed away from the mold halves (2, 3) with a jet of a fluid flushing medium, such as, e.g., water or a solvent or an inert gas. Subsequently the molded lens is dried. In accordance with the invention the flushing is accomplished with the mold halves (2, 3) still in the closed position. There is also described an apparatus for carrying out the method.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: March 18, 2014
    Assignee: Novartis AG
    Inventors: Axel Heinrich, Bernhard Seiferling, Peter Hagmann
  • Patent number: 8663510
    Abstract: Apparatus and methods for injection molding intraocular lenses includes an embodiment having first and second runners extending into first and second optic cavities of a mold configured to make a dual optic lens device.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: March 4, 2014
    Assignee: Bausch & Lomb Incorporated
    Inventors: Anita M. Graney, Graham W. Biddle, Thomas Lodadio, William J. Appleton
  • Patent number: 8652365
    Abstract: A mold set includes: a first mold and a second mold placed so that they sandwich an optical material and face each other; and a first spacer and a second spacer provided between the first and second molds, wherein: the first spacer secures an interval between the first and second molds at a first temperature achieved in a process of pressurizing the optical material; the first spacer shrinks in a mold opening-closing direction more greatly than the second spacer while the first temperature is changing to a second temperature achieved in a process of cooling the optical material; and the second spacer secures the interval between the first and second molds at the second temperature.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: February 18, 2014
    Assignee: Olympus Corporation
    Inventor: Norimitsu Nagayama
  • Patent number: 8641937
    Abstract: A method for producing a mold for molding a lens wherein the upper surface of a glass material to be molded is molded by a thermal sag method using a continuous heating furnace. A mold having a curvature distribution on the molding surface is used, the highest temperature direction from the geometric center of the molding surface to the highest temperature point in the furnace is determined in one or more regions by measuring the temperature at a plurality of measuring points on the molding surface and the mold is rotated during the forming of the mold in which an eyeglass lens is subsequently molded.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: February 4, 2014
    Assignee: Hoya Corporation
    Inventors: Noriaki Taguchi, Shigeru Takizawa
  • Patent number: 8580164
    Abstract: A method of manufacturing a mold includes following steps. Providing a solution, which includes a solvent, a solute and a plurality of nanoparticles. Providing a first substrate. Spin coating the solution on the first substrate, and then vaporizing the solvent to form a first mold on the first substrate. Thus, an upper surface of the first mold has a plurality of first porous structures. The present invention further includes forming an optical film having protrusion patterns with the aforementioned mold.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: November 12, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chun-Yu Shen, Sheng-Fa Liu, Yu-Hsien Chen, Huai-An Li, Bao-Sian Ciou
  • Patent number: 8568626
    Abstract: A method for making a silicone hydrogel contact lens is provided. In one embodiment, a prepolymer mixture is polymerized in a lens mold in an atmosphere having less than about 10000 ppm oxygen to form a silicone hydrogel contact lens suitable for extended wear as characterized by producing less than 10% corneal swelling after a period of continuous wear of 7 days including normal sleep periods. In one embodiment, the prepolymer mixture comprises at least one oxyperm material containing hydrophilic groups, wherein the at least one oxyperm material is a siloxane-containing macromer or monomer, at least one ionoperm material, and a cross-linking agent. In certain embodiments, the polymerization of the prepolymer mixture may be carried out in an atmosphere having less than about 1000 ppm oxygen.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: October 29, 2013
    Assignee: CIBA Vision Corporation
    Inventors: Paul Clement Nicolson, Richard Carlton Baron, Peter Chabrecek, John Court, Angelika Domschke, Hans Jorge Griesser, Arthur Ho, Jens Hopken, Bronwyn Glenice Laycock, Qin Liu, Dieter Lohmann, Gordon Francis Meijs, Eric Papaspiliotopoulos, Judy Smith Riffle, Klaus Schindhelm, Deborah Sweeney, Wilson Leonard Terry, Jr., Jurgen Vogt, Lynn Cook Winterton
  • Patent number: 8535043
    Abstract: The present invention provides molds useful in contact lens production, which molds incorporate a centering and spacing feature in the form of tabs on one of the mold halves. The spacing feature both centers the mold halves in relationship to each other and permits free flow of excess monomer from the mold. Additionally, the spacing feature aids in height control of the one mold half in relation to the other mold half.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 17, 2013
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Jose L. Perez, David A. Katterhenry, Matias D. Heinrich
  • Patent number: 8535044
    Abstract: An apparatus and method for releasing a lens molded in a cavity between posterior and anterior mold sections and adhered thereto. A post is configured to support a flange of the posterior section while the anterior section remains spaced from the post. Posterior section is compressed between a pin applied to an outer concave surface of the posterior section and the post, thereby initially releasing peripheral regions of the posterior section and subsequently the remaining portions thereof. Upon separation, the anterior section together with the lens drops onto the post so that its outer convex surface rests on the post. A collar unit with gas channels presses against a flange of the anterior section while blowing jets of gas towards an interface between a “monomer” ring formed around the lens. In this manner, initially the “monomer” ring and then peripheral regions of the lens are separated from the anterior section.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 17, 2013
    Assignee: Bausch & Lomb Incorporated
    Inventors: Ger M. Reynolds, Jerry E. Sullivan, John J. Cardiff, Alan D. Kelly, Frank J. Rouse
  • Patent number: 8506857
    Abstract: An injection compression molding method of a lens is provided, where a toggle link mechanism (65) is actuated to close a molding die (50) and a movable die plate (64) is moved to a position establishing a cavity thickness of greater than a thickness of an article to be molded while the die is closed. After injecting a molten resin into the cavity, the molten resin is sealed in the cavity and the toggle link mechanism (65) is actuated to advance the movable die plate (64) toward a fixed die plate (61), the relative position of a rear die plate (62) and the movable die plate (64) is made constant at a position where extension of a tie bar (63) becomes a predetermined value, and the molten resin is cooled for a predetermined time after completion of pressurizing the resin.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: August 13, 2013
    Assignee: Hoya Corporation
    Inventors: Tatsuo Nishimoto, Kiyohiro Saito, Kenji Tanagawa, Tetsuya Uchida
  • Patent number: 8506858
    Abstract: A process for the automatic manufacturing of different toric optical lenses having a front surface and a rear surface having a predetermined rotational orientation relative to one another, and with at least one of the front and rear surfaces having a toric portion, comprises forming a first toric lens by: introducing a starting material into a lens mold (3) comprising a male mold half (30) and a female mold half (31) defining a mold cavity between the shaping surfaces of the male and female mold halves, the shaping surfaces being arranged at a first rotational position relative to one another and at least one of them being toric, and curing the starting material in the mold cavity to form the first toric lens.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: August 13, 2013
    Assignee: Novartis AG
    Inventors: Norbert Doerr, Stefan Schmittner, Alfred Fischer, Peter Brotzmann
  • Patent number: 8476551
    Abstract: An exemplary cutting apparatus for cutting components from a sprue includes a sprue retainer, a laser cutting unit, and a rotating driving unit. The sprue retainer has a supporting surface. The supporting surface defines a receiving hole, and grooves extending across the entire supporting surface. The grooves are in communication with the receiving hole. The laser cutting unit is disposed above the sprue retainer and is configured for emitting a laser beam to cut the sprue carried on the sprue retainer. The sprue retainer is coupled to the rotating driving such that the rotating driving unit is capable of driving the sprue retainer to rotate.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: July 2, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Tsai-Shih Tung
  • Patent number: 8454864
    Abstract: The present disclosure relates to a method for making a mold for forming an anti-flare lens. The lens includes an optically active part and an optically inactive part. In the method, a mold core blank having a bottom surface and a top surface, is provided. The bottom surface is machined into a first surface portion, a second surface portion, and an annular surface portion. The second surface portion is located at a center of the mold core blank. The annular surface portion connects the second surface portion and the first surface portion. The first surface portion is roughened to form a roughened molding surface for forming the optically inactive part. The second surface portion is precisely machined to form a smooth molding surface for forming the optically active part. The annular surface is precisely machined to form a smooth transition surface.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: June 4, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chien-Feng Huang
  • Patent number: 8444408
    Abstract: The invention is related to a method of the manufacture of an implantable lens from a liquid polymer precursor in an open mold, during which the liquid polymer precursor in metered into the open mold in a such measured amount, that comes into contact with a functional shaping inner surface of the open mold, which is located under a peripheral circular sharp edge of the stationary open mold or which reaches up to this peripheral circular sharp edge, at which point the open mold, which contains the liquid polymer precursor, is rotated around it's vertical axis at a speed, at which the edge of the surface of the liquid polymer precursor reaches the peripheral circular sharp edge of the open mold, after which the liquid polymer precursor is exposed to conditions, under which it transforms itself into a state of a clear solid polymer by polymerization and/or cross-linking, until such time, at which the stated transition is attained, and then the implantable intraocular lens is removed from the open mold.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: May 21, 2013
    Assignee: S.K.Y. Polymers, Inc.
    Inventors: Jiri Michalek, Jiri Vacik
  • Patent number: 8425222
    Abstract: Taper portions 151 and 161 are provided in the cavity of a stationary side die 110 and the cavity of a movable side die 120 in an injection molding apparatus, respectively, and a floating mechanism 170 is provided so that one taper portions are able to freely follows the other taper portions while die clamping. This configuration makes it possible to correct axial misalignment in each of the cavities.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 23, 2013
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Masayoshi Uehira, Akihiro Iwane, Akihiko Matsumoto, Takahito Muroi
  • Patent number: 8409481
    Abstract: A method of manufacturing an implantable lens from liquid polymer precursor in an open mold includes metering the liquid into the mold in a measured amount that comes into contact with a functional shaping inner surface of the mold located under a peripheral circular sharp edge of the stationary mold or which reaches up to this peripheral circular sharp edge, at which point the open mold is rotated around it's vertical axis at a speed at which the edge of the surface of the liquid polymer precursor reaches the peripheral circular sharp edge of the open mold, after which the liquid polymer precursor is exposed to conditions under which it transforms itself into a state of a clear solid polymer by polymerization and/or cross-linking, until the transition is attained, and then the implantable intraocular lens is removed from the mold.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: April 2, 2013
    Assignee: S.K.Y. Polymers, Inc.
    Inventors: Jiri Michalek, Jiri Vacik
  • Patent number: 8398902
    Abstract: The invention provides a method of moulding a vision correction lens from a transparent resin. The resin is introduced into a mould cavity, the sides of which cavity which correspond to the front and rear surfaces of the lens being formed by two sheets, at least one of which is flexible. The amount of resin in the cavity is adjusted to deform the flexible sheet(s) so that the shape of the lens defined by the sheet(s) will provide a desired power, and the resin is then cured. The sheets can be transparent, and a user can look through them as the amount of resin is adjusted, to ensure that the lens is of the desired power. Further, the amount of resin in the cavity can be adjusted to accommodate changes in the refractive index of the resin as it cures.
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: March 19, 2013
    Inventor: Joshua David Silver
  • Patent number: 8377345
    Abstract: A method of manufacturing an optical member by mixing isocyanate terminal prepolymer component (A) and aromatic diamine component (B), and immediately after mixing, casting a mixture into a casting mold to obtain a molded article. A method of manufacturing a plastic lens by mixing said components (A) and (B), immediately after mixing, casting a mixture into a casting mold and polymerizing it to obtain a molded article. A gasket for molding plastic lenses comprised of a cylindrical member. A casting mold for molding plastic lenses using this gasket and a monomer casting jig.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: February 19, 2013
    Assignee: Hoya Corporation
    Inventors: Masanori Kadota, Shigeo Nakamura, Kengo Hirayama, Yoshitaka Kitahara, Yuji Hoshi, Yasuhisa Okamoto
  • Patent number: 8372317
    Abstract: A method of casting a plastic lens starting material liquid using a casting apparatus comprising at least a mixing and discharging part and a casting part, and casting a plastic lens starting material liquid sequentially into multiple casting molds.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: February 12, 2013
    Assignee: Hoya Corporation
    Inventor: Yasuhisa Okamoto
  • Patent number: 8354047
    Abstract: A method for press molding a lens array is provided. First, a mold core is provided. The mold core has a first surface having a first alignment formed thereon using a lithography method, and a lens molding surface array and a second alignment formed thereon using an ultra-precision machining method. Then, a substrate is provided. The substrate has a second surface having a third alignment mark formed thereon using the lithography method. The substrate is first aligned with the mold core by aligning the third alignment mark with the first alignment mark, then is further aligned by offsetting the substrate the spacing between the first and second alignment marks to align the center of the substrate with the center of the lens molding surface array. Finally, a molding material is applied on the substrate, then the mold core is applied on the molding material to press mold the lens array.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: January 15, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Sei-Ping Louh
  • Patent number: 8343393
    Abstract: In a molding apparatus in which upper and lower dies are held in a bearing, there are provided pipes for introducing N2 gas used for controlling temperatures of balls of the bearing, whereby difference in temperature between the guide member and the upper and lower dies is controlled. With this structure, it is possible to prevent generation of an excessive compressive force between the upper die and the lower die and the bearing, to thereby prevent breakage of the dies. Further, it is also possible to prevent formation of gaps between the upper die and the lower die and the bearing, to thereby mold an optical element excellent in accuracy of an optical axis.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Nomura
  • Patent number: 8308999
    Abstract: Methods for producing contact lenses from a polymerizable composition are provided. The methods generally include providing a carrier carrying a plurality of molds each of which contains a polymerizable composition. A chamber is provided which contains a light source providing light to the chamber effective to facilitate polymerization of the polymerizable composition. The molds in the carrier are exposed to the light in the chamber. During this exposing, the light source is monitored, for example, using digital addressable lighting interface (DALI) technology.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: November 13, 2012
    Assignee: CooperVision International Holding Company, LP
    Inventor: Richard C. Rogers
  • Patent number: 8298458
    Abstract: Systems and methods of manufacturing ophthalmic lenses, for example, silicone hydrogel contact lenses, are provided. The present systems and methods provide certain amounts of ultraviolet light to contact lens mold assemblies that comprise a silicone hydrogel precursor composition. For example, the systems and methods may provide ultraviolet light at an intensity from 20 ?W/cm2 to 4000 ?W/cm2. The ultraviolet light intensity can be provided as substantially uniform levels to provide consistent curing for batches of silicone hydrogel contact lenses.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: October 30, 2012
    Assignee: CooperVision International Holding Company, LP
    Inventor: Richard C. Rogers
  • Patent number: 8292256
    Abstract: This invention describes molds made from alicyclic co-polymers that are useful in the production of contact lenses and methods for their use.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: October 23, 2012
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Changhong Yin, Scott F. Ansell
  • Patent number: 8287269
    Abstract: The invention provides molds useful in the production of contact lenses having seamless edges and in which molds movement of one mold half in relation to the other mold half is decreased. These results are attained by providing mold halves with shoulder stops and seam-matching features.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: October 16, 2012
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Dharmesh K. Dubey, Xu Song, Mark E. Schlagel
  • Patent number: 8273272
    Abstract: The present invention provides a method for manufacturing a lens used in a camera module including the steps of: preparing a preform for manufacturing a lens; forming a front lens on a front surface of the preform; and forming an array lens by forming a rear lens on a rear surface of the preform during the formation of the front lens.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: September 25, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Cheong Hee Lee, Jong Ho Ahn, In Cheol Chang, Hye Ran Oh, Seok Cheon Lee, Young Su Jin
  • Patent number: 8262951
    Abstract: A method of forming a mold, concludes: winding a tape around peripheral surfaces of a first molding die and a second molding die to assemble a mold; forming on the tape an injection port for injecting a resin material for forming a plastic lens into the mold; and forming a tab by cutting out a part of the tape non-circularly.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: September 11, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Hiroshi Shimizu
  • Patent number: 8262380
    Abstract: An exemplary injection mold for manufacturing a fiber optic connector includes a first mold, a second mold, an insert, two first positioning bar, and four second positioning bars. The first mold and the second mold cooperatively define a mold cavity. The mold cavity includes two lens molding recesses. The two inserts are attached to the second mold and located in the mold cavity. A dimension of each second bar in cross section is substantially smaller than that of each first positioning bar. One first positioning bar and two second positioning bars are arranged around each insert to position the insert, such that the inserts is suspended in the mold cavity and precisely aligns with the respective molding recesses.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: September 11, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tai-Cherng Yu, Sheng-Jung Yu, Chun-Yu Lin
  • Patent number: 8246335
    Abstract: An apparatus for molding optical fiber connector is provided. The optical fiber connector includes a main body. The main body has a blind hole for receiving an optical fiber two opposite surfaces being substantially parallel with the blind hole, and a lens portion aligned with the blind hole. The apparatus comprises a molding cavity and an insert for forming the blind hole. The molding cavity includes a central portion for forming the main body, a lens-forming portion for forming the lens portion, and two lateral portions for forming the corresponding surfaces. The molding cavity includes a first gate and a second gate for introducing molding material into the molding cavity. The first gate is located between the insert and one of the two lateral portions and the second gate is defined between the insert and the other one of the lateral potions.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: August 21, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chun-Yu Lin
  • Patent number: 8231814
    Abstract: A process and method for fabricating a master lens array for use in the manufacture of duplicate lens arrays is provided. The fabrication methods provided herein are capable of maximizing the quality of the master lens array in an efficient and cost effective manner, thereby reducing the propagation of errors in the lenses formed using the master lens array.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: July 31, 2012
    Assignee: Pelican Imaging Corporation
    Inventor: Jacques Duparre
  • Patent number: 8221665
    Abstract: The invention concerns a process of manufacturing optical components. A replication tool, a sub-master or a replica is manufactured using a structured element (for example a master) and a substrate. A structure of the structured element is replicated into liquid or plastically deformable material disposed at a first place on said substrate, then hardened to make it dimensionally stable, whereon the structured element is removed. These replicating, hardening and removing steps are repeated for a second, third, etc. place on said substrate the same structured element.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: July 17, 2012
    Assignee: Heptagon Oy
    Inventors: Hartmut Rudmann, Andreas Maciossek, Markus Rossi
  • Patent number: 8221659
    Abstract: An apparatus for releasing a molded lens from a deformable mold includes a shear ring for temporarily retaining an annular portion of the deformable mold outside a periphery of the lens and a plunger for deforming an annular section of the deformable mold within the periphery of the lens. The apparatus can be employed to release a non-hydrated hydrogel lens from a deformable mold section.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: July 17, 2012
    Assignee: Bausch & Lomb Incorporated
    Inventors: Kevin Beebe, William J. Seyboth, Raymond Walker, Sanjay Rastogi, Mahendra P. Nandu, James Vermeire, Wen Jin
  • Patent number: 8221114
    Abstract: A mold for fabricating an optical fiber connector is provided. The mold includes a mold body, a core pin and a positioning block. The mold body defines a molding chamber, and the molding chamber has a lens forming portion for forming a lens. The core pin is configured for insertion into the molding chamber and forming an optical fiber insertion hole. The core pin includes a first portion and a second portion thinner than the first portion. The positioning block is configured for being arranged in the molding chamber. The positioning block includes an engaging hole for engagingly receiving the second portion.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: July 17, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shih-Chieh Yen
  • Patent number: 8202451
    Abstract: A first lens having a first bottom surface and a first top surface at opposite sides thereof; and a first supporter having a first supporting surface and a second supporting surface at opposite sides thereof, the first supporting surface being flat, the second supporting surface being in contact with the first bottom surface, the first supporter being made of transparent material, and a refraction index of the first supporter being different from a refraction index of the first lens. A lens assembly array and method of making the lens assembly array are also provided.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: June 19, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Sei-Ping Louh
  • Patent number: 8197724
    Abstract: Contact lens delensing methods are described, and the present delensing methods include using a gas to facilitate separation of a polymerized contact lens product from a contact lens mold member. The contact lens mold member is compressed to deform a portion of the mold member, and gas, such as air, is directed toward the polymerized contact lens product in contact with the portion. The contact lens mold member can be compressed as the mold member and lens product rotate. A vacuum device can be used to separate the polymerized contact lens product from the contact lens mold member after compressing the portion of the mold member and directing the gas towards the mold member. Delensing systems used to practice the present methods are also described.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: June 12, 2012
    Assignee: Coopervision International Holding Company, LP
    Inventor: Zbigniew Witko
  • Patent number: 8180482
    Abstract: The method for producing at least one rotationally symmetrical lens consisting of an opto-ceramic includes the step of moulding a ceramic green body for the lens, wherein the mould has a shaping surface, which is described by the following equation B: y ? ? 1 = cz 2 1 + 1 - ( k + 1 ) ? c 2 ? z 2 + a 1 ? z 2 + a 2 ? z 4 + a 3 ? z 6 + a 4 ? z 8 + … ? , ( B ) y1 gives a position on an optical axis; x designates a perpendicular distance from the optical axis to the surface; k, c, and a1, a2, a3, a4, . . . are constants describing a surface of the lens to be moulded and z=|x|+b, wherein b is a constant with a value greater than 0 and less than 0.3 mm, which is a measure of a deviation of the shaping surface from the surface of the lens.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: May 15, 2012
    Assignee: Schott AG
    Inventors: Yvonne Menke, Ulrich Peuchert, Yoshio Okano, Steffen Reichel
  • Patent number: 8162656
    Abstract: Disclosed are a microlens array, and a method of positioning and aligning the microlens array on another device. Generally, the microlens array comprises an array of injection molded microlens elements, and a supporting flange. Each of the microlens elements has a generally spheroid or spherical shape, and the supporting flange connects together the array of microlens elements to facilitate positioning that array of lenses on a printed circuit board, semiconductor package or wafer. This array is well suited for use with vertical cavity surface emitting lasers (VCSELs); and, in particular, the preferred embodiment of the invention addresses the problem of VCSEL laser array alignment by using arrays of microlenses elements fabricated by injection molding.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: April 24, 2012
    Assignee: International Business Machines Corporation
    Inventors: Lawrence Jacobowitz, Casimer DeCusatis
  • Patent number: 8153035
    Abstract: An apparatus for wetting and coating ophthalmic lenses having a tank with a cleaning or coating solution and a handling system for sequentially moving a lens and the solution in relation to each other, to wet the lens. A master control module is coupled to the handling system and configured execution a wetting profile. The wetting profile moves the lens to obtain a generally consistent lens surface wetting speed so that the lens coating has a more uniform thickness. According to a method, lenses are wetted in a liquid bath. The lens is placed in a handling system which moves the lens with respect to the bath according to a wetting profile. The wetting profile is based on the incremental vertical lens surface slope with respect to the surface of the solution.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: April 10, 2012
    Assignee: Gentex Optics, Inc.
    Inventor: Russell F. Weymouth, Jr.
  • Patent number: 8147727
    Abstract: Methods and systems are provided for making an ophthalmic lens. The present methods and systems are effecting in coupling two mold sections together at two or more discrete regions. Embodiments of the methods and systems form a bore that extends completely through one of the mold sections and only partially through the other mold section. During formation of the bore, the mold material in proximity to the bore being foamed becomes molten and diffuses from the bore. A portion of the molten mold material is provided at a contact point between the two mold sections and when the molten material cools, the material foams a spot weld between the mold sections. By foaming multiple hollow spot welds in a mold assembly, the two mold sections can be securely coupled to each other during the manufacture of an ophthalmic lens, such as a silicone hydrogel contact lens.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: April 3, 2012
    Assignee: Coopervision International Holding Company, LP
    Inventors: Ian Bruce, Robert Oag, Stuart Bailey, Stephen Saunders