Patents by Inventor Roland Mandler

Roland Mandler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130221589
    Abstract: Manufacturing spectacle lenses using lens blanks blocked onto holding elements is laborious and time-consuming. Furthermore the manufacture is rendered difficult by different surface curvatures on the receiving side of the lens blanks. The purpose of the invention is to remedy such drawbacks. Accordingly this invention relates to equipment for processing lens blanks comprising a workpiece turret supported rotatably about a main axis of rotation, said turret being fitted with at least two workpiece receptacles configured each outside the main axis of rotation and being rotatable about spindle axes, each workpiece receptacle comprising a workpiece receiving surface having a surface curvature rotationally symmetrical about the spindle axis, whereby said surface curvatures of the workpiece receiving surfaces being different from each other.
    Type: Application
    Filed: February 26, 2013
    Publication date: August 29, 2013
    Inventor: Roland Mandler
  • Publication number: 20120140169
    Abstract: A method for manufacture of spectacle glasses from prefabricated blanks without cutting, consisting preferably of plastic or silicate glass, with a front side no to be finished and an opposite back side to be finished by a CNC machine, having at least one optical focus in common, wherein for the finishing of the back side one calculates a prescription surface on the basis of a prescription of a person, describing the vision defects of a left and a right eye, such that the machined back side together with the front side forms a first prescription lens and a second prescription lens, and from these one makes two spectacle glasses, and wherein the focal points of the first spectacle glass correct the vision defect of the left eye and the focal points of the second spectacle glass correct the vision defect of the right eye of the person.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 7, 2012
    Applicant: OPTOTECH OPTIKMASCHINEN GMBH
    Inventor: Roland Mandler
  • Publication number: 20120057123
    Abstract: The invention relates to a method for the production of spectacle lenses from raw lenses prefabricated in a non-cutting manner. The raw lenses have a front side that is not to be reworked and an opposing back side to be reworked with a CNC machine, which sides have at least one optical focal point in common. In order to rework the back side a prescription surface is calculated on the basis of a prescription describing a visual error and of the geometry of the front side. This surface forms a prescription lens in common with the front side, the focal points of which lens correct the visual error. The front side is shaped in such a manner that it is a convex and rotationally symmetrical first freeform surface. This freeform surface is composed in a rotationally symmetrical manner about a middle axis by at least two spherical sections with different radii, whereby the spherical sections border each other tangentially.
    Type: Application
    Filed: September 7, 2011
    Publication date: March 8, 2012
    Applicant: OptoTech Optikmaschinen GmbH
    Inventor: Roland MANDLER
  • Publication number: 20100060848
    Abstract: For manufacturing ophthalmic lenses and other optical form bodies made of plastic material, plastic form parts are used which are made by non-cutting shaping and are then further worked by mechanical production steps. Said plastic form parts are circular blanks (1) made of two different plastic materials which are firmly joined to each other. Thereby, an interior lens element (2) that consists of a high-quality material is concentrically surrounded by a ring fixture (3) which consists of a low priced material. Either surface of the lens element (2) may feature any given geometry. During mechanical working, the ring fixture (3) is used for mounting as well as for depositing and, in addition, for stabilizing the workpiece (9). For this reason it is partially maintained throughout the mechanical working and is cut off at the end only.
    Type: Application
    Filed: September 28, 2009
    Publication date: March 11, 2010
    Applicant: Essilor International (Compagnie Generale D'optique)
    Inventors: Roland Mandler, Walter Danhardt, Dan Riall, Marc Silva
  • Patent number: 7614742
    Abstract: The invention concerns a method for producing ophthalmic lenses that uses plastic blanks in the form of flat, round discs. The outer edge of said plastic blanks is clamped and the desired final surface geometry and surface quality of the front faces of the lens are subsequently produced by a machining process using grinders and/or lathes and by smoothing and polishing processes. During machining, a thicker annular region is retained on the outer circumference of the workpiece. The annular region clamps or arranges the workpiece during machining and transport operations and stabilizes the lens for additional machining. Shaped pieces for identifying the machining axes are attached to the annular region. The lens is provided with fine markings to characterize the lens that has been produced, with the lens then being separated from the region.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: November 10, 2009
    Assignees: Optotech Optikmashinen GmbH, Carl Zeiss Vision GmbH
    Inventors: Roland Mandler, Reinhold Weis
  • Patent number: 7494305
    Abstract: A raster cutting apparatus and method for producing accurately formed, aspheric ophthalmic lenses having a good quality surface finish. The accurate form and good surface finish are obtained by using a substantially spherically shaped cutting tool having a large radius. The methods include utilizing a cutting path which provides substantially constant cutting-force, such as a constant surface-cutting-speed raster pattern.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: February 24, 2009
    Assignee: Essilor International (Compagnie Generale D'Optique)
    Inventors: James Daniel Riall, Walter Dannhardt, Roland Mandler, Tobias Müller
  • Patent number: 7413502
    Abstract: The invention concerns a method for producing ophthalmic lenses that uses plastic blanks in the form of flat, round discs. The outer edge of said plastic blanks is clamped and the desired final surface geometry and surface quality of the front faces of the lens are subsequently produced by a machining process using grinders and/or lathes and by smoothing and polishing processes. During machining, a thicker annular region is retained on the outer circumference of the workpiece. The annular region clamps or arranges the workpiece during machining and transport operations and stabilizes the lens for additional machining. Shaped pieces for identifying the machining axes are attached to the annular region. The lens is provided with fine markings to characterize the lens that has been produced, with the lens then being separated from the region.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: August 19, 2008
    Assignees: Optotech Optikmaschinen GmbH, Carl Zeiss Vision GmbH
    Inventors: Roland Mandler, Reinhold Weis
  • Publication number: 20080129959
    Abstract: The invention concerns a method for producing ophthalmic lenses that uses plastic blanks in the form of flat, round discs. The outer edge of said plastic blanks is clamped and the desired final surface geometry and surface quality of the front faces of the lens are subsequently produced by a machining process using grinders and/or lathes and by smoothing and polishing processes. During machining, a thicker annular region is retained on the outer circumference of the workpiece. The annular region clamps or arranges the workpiece during machining and transport operations and stabilizes the lens for additional machining. Shaped pieces for identifying the machining axes are attached to the annular region. The lens is provided with fine markings to characterize the lens that has been produced, with the lens then being separated from the region.
    Type: Application
    Filed: January 28, 2008
    Publication date: June 5, 2008
    Inventors: Roland Mandler, Reinhold Weis
  • Publication number: 20070229756
    Abstract: For manufacturing ophthalmic lenses and other optical form bodies made of plastic material, plastic form parts are used which are made by non-cutting shaping and are then further worked by mechanical production steps. Said plastic form parts are circular blanks (1) made of two different plastic materials which are firmly joined to each other. Thereby, an interior lens element (2) that consists of a high-quality material is concentrically surrounded by a ring fixture (3) which consists of a low priced material. Either surface of the lens element (2) may feature any given geometry. During mechanical working, the ring fixture (3) is used for mounting as well as for depositing and, in addition, for stabilizing the workpiece (9). For this reason it is partially maintained throughout the mechanical working and is cut off at the end only.
    Type: Application
    Filed: March 15, 2007
    Publication date: October 4, 2007
    Inventors: Roland Mandler, Walter Danhardt, Dan Riall, Marc Silva
  • Publication number: 20060073771
    Abstract: The invention concerns a method for producing ophthalmic lenses that uses plastic blanks in the form of flat, round discs. The outer edge of said plastic blanks is clamped and the desired final surface geometry and surface quality of the front faces of the lens are subsequently produced by a machining process using grinders and/or lathes and by smoothing and polishing processes. During machining, a thicker annular region is retained on the outer circumference of the workpiece. The annular region clamps or arranges the workpiece during machining and transport operations and stabilizes the lens for additional machining. Shaped pieces for identifying the machining axes are attached to the annular region. The lens is provided with fine markings to characterize the lens that has been produced, with the lens then being separated from the region.
    Type: Application
    Filed: September 12, 2005
    Publication date: April 6, 2006
    Inventors: Roland mandler, Reinhold Weis
  • Publication number: 20060026816
    Abstract: A raster cutting apparatus and method for producing accurately formed, aspheric ophthalmic lenses having a good quality surface finish. The accurate form and good surface finish are obtained by using a substantially spherically shaped cutting tool having a large radius. The methods include utilizing a cutting path which provides substantially constant cutting-force, such as a constant surface-cutting-speed raster pattern.
    Type: Application
    Filed: August 3, 2004
    Publication date: February 9, 2006
    Inventors: James Riall, Walter Dannhardt, Roland Mandler, Tobias Muller
  • Patent number: 6383061
    Abstract: For two-side processing of optical lenses, the invention provides that blanks to be used for each lens body (7) comprise a chucking extension (18) whereby a single machine is sufficient for implementing the procedure. In addition to workpiece spindles (1, 2) as well as tool spindles (4, 5) with coarse tools (8) and finishing tools (9), the machine also includes an unloading device (10) and a loading device (13) which in successive interacting operations take the lens body (7) when processed on one side and at the circumference from a chucking tool (12) of the tool spindle (1) and turn it round for centered insertion in its inverted position into a chucking tool (15) of the tool spindle (2) for processing on the other side. The workpiece spindles (1, 2) may be mounted parallel to each other on a horizontally displaceable and vertically adjustable feed slide (3). A feed carriage (6) may displace and slew the tool spindles (4, 5) together with the unloading device (10) around a horizontal B axis.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: May 7, 2002
    Assignee: OPTO-Tech GmbH
    Inventor: Roland Mandler
  • Patent number: 6155911
    Abstract: A process and a device for polishing both sides of an optical lens, in which the lens is mounted in a first workpiece holder and is polished on a first side and a second workpiece holder is then positioned opposite the first work piece holder. The lens, without being turned around, is transferred to the second workpiece holder, where its other side is polished by treatment coming from the side of the first workpiece holder.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: December 5, 2000
    Assignee: OptoTech Optikmaschinen GmbH
    Inventor: Roland Mandler
  • Patent number: 5951376
    Abstract: For two-side processing of optical lenses, the invention provides that blanks to be used for each lens body (7) comprise a chucking extension (18) whereby a single machine is sufficient for implementing the procedure. In addition to workpiece spindles (1, 2) as well as tool spindles (4, 5) with coarse tools (8) and finishing tools (9), the machine also includes an unloading device (10) and a loading device (13) which in successive interacting operations take the lens body (7) when processed on one side and at the circumference from a chucking tool (12) of the tool spindle (1) and turn it round for centered insertion in its inverted position into a chucking tool (15) of the tool spindle (2) for processing on the other side. The workpiece spindles (1, 2) may be mounted parallel to each other on a horizontally displaceable and vertically adjustable feed slide (3). A feed carriage (6) may displace and slew the tool spindles (4, 5) together with the unloading device (10) around a horizontal B axis.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: September 14, 1999
    Assignee: Opto Tech GmbH
    Inventor: Roland Mandler
  • Patent number: 5951375
    Abstract: A holder for precision working of optical lenses comprises a cylindrical base (4) designed as a dressing tool, a diaphragm holder (5) fastened thereto, an elastic diaphragm (6) attached air-tight thereto as well as a centric duct (22, 23) crossing the base (4) and the diaphragm holder (5) axially. The dressing tool (4) is preferably a cup-shaped tool to which a lens holder formed as a ring element (15) can be fastened in a capping manner. The lens holder (15) is provided with banking and/or supporting surfaces (21) as well as engaging elements (17) for holding a lens (19) to be worked; moreover, it may be provided with additional dressing elements (18). The dressing tool (4) and the lens holder (15) are combined to a combined tool K which can be fastened to a common rotating machine spindle (1).
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: September 14, 1999
    Assignee: Optotech Optikmaschinen GmbH
    Inventor: Roland Mandler
  • Patent number: 4669226
    Abstract: A device for holding delicate workpieces, particularly optical lenses, includes a membrane having a clamping surface. To receive a workpiece, the membrane is pressurized and bulges in such a manner that the clamping surface is enlarged and becomes funnel-shaped. In order to clamp the workpiece, the pressure in the membrane is decreased so that the membrane assumes a shape in which the clamping surface is constricted and holds the workpiece with a force which is evenly distributed over its entire periphery, through which deformation and destruction of workpieces is safely avoided.
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: June 2, 1987
    Assignee: Wilhelm Loh Wetzlar Optikmaschinen GmbH & Co. KG
    Inventor: Roland Mandler