Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 6695607 | Mold half-block for injection molding an optical article out of thermoplastic material, and a mold including such a half-block A mold half-block possesses at least one mold recess defined transversely by the working face of a shell provided with heat-transfer parts that are intrinsic and both-way (both heating and cooling), the shell including a base that receives all of the heat... | 02/24/2004 |
| 6663481 | Method of improving the accuracy of a beveling operation applied to a spectacle lens, and a corresponding beveling tool A beveling operation is applied to a spectacle lens to blunt the sharp edges of its contour. Compensation means having a capacity for elastic deformation are operative between an active periphery of a beveling tool and its support shaft during the bevelin... | 12/16/2003 |
| 6514133 | Tool for smoothing optical surfaces, in particular for ophthalmic lenses A tool for smoothing optical surfaces including a rigid support and a generally annular working member which is at least in part axially deformable. The support forms a recessed annular housing and the working member is attached to the support via the bot... | 02/04/2003 |
| 6382406 | Eyeglass lens display unit An eyeglass lens display unit comprises at least two branches for supporting at least two different eyeglass lens portions. The two branches are mobile relative to each other to position the eyeglass lens portions edge-to-edge along their diameter.... | 05/07/2002 |
| 6379008 | Method of determining the shape of an opthalmic contact lens for correcting optical aberrations of the eye beyond defocusing or astigmatism and system for implementing the method A method of determining the shape of an ophthalmic contact lens for correcting optical aberrations of the eye beyond defocusing or astigmatism includes the steps of measuring the optical aberrations of the eye to be corrected, determining the shape of the... | 04/30/2002 |
| 6375747 | Distribution mask for depositing by vacuum evaporation A distribution mask including at least two separate blanking panels (22), one of which is mounted mobile. The two blanking panels (22) are substantially coplanar, and, controlled by a common control unit (23), both mounted continuously mobile between two ... | 04/23/2002 |
| 6354504 | Symbol reader for reading a symbol on a transparent object A symbol reader including an illumination system comprising a plurality of light sources on one side of an object carrying a symbol to be read and a CCD camera on the other side of the object. The light sources of the illumination system are disposed in a... | 03/12/2002 |
| 6231433 | Blank clamping device for a machine for trimming optical lenses A machine for trimming optical lenses includes two coaxial clamping jaws for clamping faces of a blank provided with bearing arrangements each of which cooperates with one face of the blank. At least one of the jaws includes a plate and a body. The plate ... | 05/15/2001 |
| 6086202 | Method of producing angular tolerance markings for lenses for correcting astigmatism, and associated lenses In a method of producing tolerance markings on a contact lens for correcting astigmatism which has a given cylinder, the tolerance markings comprise at least two straight line segments in the peripheral part of the contact lens with an angle 2... | 07/11/2000 |
| 5962561 | Internal mold release compositions containing phosphate esters Internal mold release compositions for molding polyurethane and polythiourethane is disclosed herein. The composition includes a mixture of: (a) a mono C2 -C6 alkyl phosphate; (b) a di C2 -C6 alkyl phosphate, wh... | 10/05/1999 |
| 5754271 | Heterocyclic chromenes and their use in the field of ophthalmic optics The invention relates to photochromic compounds of general formula: ##STR1## wherein Ra, Rb and Rc is denote hydrogen; alkyl; aryl; OR, SR, COR or COOR, in which R denotes hydrogen, alkyl or aryl, amino of formula NR | 05/19/1998 |
| 5702825 | Low yellow index polymer compositions, polymerizable compositions and lenses using said compositions The present invention relates to a new polymer compositions for use in the manufacture of ophthalmic lenses, to their use in ophthalmology and to apparatus using these lenses, such as eyepieces and film/video camera optics.... | 12/30/1997 |
| 5631720 | Ophthalmic lenses with heterocyclic chromene compounds The invention relates to ophthalmic lenses comprising a transparent organic polymer material and photochromic compounds of general formula ##STR1## wherein Ra, Rb and Rc are hydrogen; alkyl; aryl; OR, SR, COR or COOR,... | 05/20/1997 |
| 5440383 | Phase detection deflectometer-type optical device having a large measuring range An optical device, of the deflectometer type, particularly with phase detection, comprises a light source, a surface to be tested, a semi-reflective surface between the light source and the surface to be tested to deflect the light beam reflected by the s... | 08/08/1995 |
| 5402607 | Method and multi-axis numerically-controlled machine for machining surfaces In this machining method using a multi-axis numerically-controlled machine, a workpiece holder (4) is rotated (rotation ) in step-by-step motion around an axis (Z), rectilinear movements are produced between a tool (3) and the workpiece holder (4) ... | 04/04/1995 |
| 5310847 | Polymer compositions based on polythiourethanes for the manufacture of organic glasses The present patent application relates to a polyurethane composition for organic glasses characterized in that it comprises: a first constituent formed by a polyisocyanate at least di-functional, and a second constituent formed by an acyclic saturated mon... | 05/10/1994 |
| 5296305 | Method of fabricating a lens made of transparent polymer with modulated refracting index The present invention relates to a method of manufacture of an optical lens providing refractive index modulation, characterized in that, starting from a previously shaped lens of transparent hydrophilic polymer of the hydrogel type, the lens is impregnat... | 03/22/1994 |
| 5272495 | Progressive multifocal ophthalmic lens The lens has an aspherical surface having a zone for far vision, a zone for near vision, and between these two zones, a zone for intermediate vision, with a meridian curve along which the curvature of the surface varies progressively and which is inclined... | 12/21/1993 |
| 5270745 | Progressive multifocal ophthalmic lens The lens has an aspherical surface having a zone for far vision, a zone for near vision, and between these two zones, a zone for intermediate vision, with a meridian curve along which the curvature of the surface varies progressively and which is inclined... | 12/14/1993 |
| 5258024 | Method of manufacture of a lens of transparent polymer having a modulated refractive index The present invention relates to a method of manufacture of an optical lens providing refractive index modulation, characterized in that, starting from a lens of transparent hydrophilic polymer preferably of the hydrogel type, which has previously been sh... | 11/02/1993 |
| 5233038 | Photochronic compounds of the indolino-spiro-benzoxazine type The invention relates to novel photochromic compounds of the family of indolino-spiro-oxazines, these compounds being distinguished by the fact that they correspond to the formula of an indolino-spiro-benzo-cyclodiazene.... | 08/03/1993 |
| 5166298 | Oxygen-permeable transparent polymer compositions for contact lenses of the rigid type An oxygen-permeable transparent polymer composition for contact lenses of the rigid type comprises at least a first constituent having ethylene double bonds of the type which is polymerizable in a rigid matrix, and a second constituent formed by a silane ... | 11/24/1992 |
| 5139707 | Indolino-spiroquinoxalino oxazine photochromatic compounds, methods for their preparation, photochromic compositions and articles containing such compounds The new photochromic compounds of the invention have the formula of a indolino-spiro-oxazine comprising an indolinic part and an oxazine part wherein the oxanine part comprises an unsaturated 6-atoms bi-aza heterocycle of the pyrimidine type included in a... | 08/18/1992 |
| 5114621 | Indolino-spiro-oxazine photochromic compounds with five-membered rings, method for their preparation, photochromic compositions and articles containing such compounds The new photochromic compounds of the invention have the formula of an indolino-spiro-oxazine comprising an indolinic part and an oxazine part, wherein said oxazine part comprises an unsaturated heterocycle with 5 links which comprises one or several atom... | 05/19/1992 |
| 4959118 | Apparatus for applying a protective film on one face of a series of ophthalmic lenses A roll of composite tape composed of an adhesive tape and a strippable backing tape is paid out, and the adhesive tape and the strippable tape are separated. A circular hole of predetermined diameter is punched through the strippable tape, and the strippa... | 09/25/1990 |
| 4940751 | Wettable silicon elastomer for the manufacture of contact lenses The wettable silicone elastomer is obtained by crosslinking of a composition of epoxidized silicones. The elastomer thus obtained is made wettable by grafting saccharide compounds on epoxy groups of the elastomer. The invention is applied in particular to... | 07/10/1990 |
| 4852631 | Method and apparatus for fixing a metal block on a face of an ophthalmic lens, by casting molten metal thereon In this blocking apparatus, at least a portion of the pipe connecting the inlet orifice of the mold to the outlet orifice of the tank containing molten metal is in thermal contact with the mold, which mold includes at least one channel through which a coo... | 08/01/1989 |
| 4844143 | Mold for fixing a metal block on one of the faces of an ophthalmic lens The cylindrical side wall of the mold cavity (8) has an inside diameter (D) which is greater than the largest existing ophthalmic lens diameter, and a generally cylindrical membrane (25) of elastomer material is disposed concentrically inside the mold cav... | 07/04/1989 |
| 4838674 | Multifocal ophthalmic lens In this lens, the curvature of the main meridian curve of power progression (MP) begins to vary from a point (A3) situated within the intermediate vision zone (VI) at a predetermined distance d1 from the point (A1) on the main meridian curve (MP) situated... | 06/13/1989 |
| 4831789 | Tool whose shape adapts automatically to the surface of an ophthalmic lens This tool whose shape adapts automatically to the surface of an ophthalmic lens is suitable for use as a polisher or as an applicator buffer. It comprises a rigid support (2) having a cavity (5) in one of its faces, together with a buffer (1) constituted ... | 05/23/1989 |
| 4826548 | Method for applying a protective film on one face of a series of ophthalmic lenses A roll of composite tape comprising an adhesive tape and a strippable backing tape is paid out and the adhesive tape and the strippable tape are separated. A hole of predetermined diameter is punched through the strippable tape and the strippable tape and... | 05/02/1989 |
| 4790644 | Glasses frame This frame, comprising for each of the lenses to be supported an open metallic eye-piece and of which the ends are adapted to abut one against the other by means of a mutually screwing member is characterized in that the two ends of the metallic eye-piece... | 12/13/1988 |
| 4707089 | Spectacles formed of a frame and a saddle bridge Spectacle frame comprising two eyewires associated by at least one assembly bar, wherein each of the eyewires comprises in the nasal rest zone of the frame at least one projecting element adapted to be secured in the wall of a saddle bridge in order to ma... | 11/17/1987 |
| 4685782 | Spectacles having a detachable front Spectacles formed by combining two separate parts, respectively, a support structure connected to spectacle temples and a detachable front. A bridge of the front is adapted to be joined to the central part of the support structure connecting the two spectacle ... | 08/11/1987 |
| 4673265 | Procedure and device for automatic refractometric measurement of the degree of ametropia of a human eye This invention concerns a procedure and device for refractometric measurement of the degree of ametropia of a human eye. The device for this invention comprises a light-emitting source combined with a focusing lens, which produces an image of this source on th... | 06/16/1987 |
| 4653881 | Apparatus for measuring the parameters required when mounting ophthalmic lenses upon a spectacles frame Device for measuring the ocular parameters of a patient, especially parameters for mounting ophthalmic lenses on a spectacle frame with a view to their adaptation to the patient, wherein a reference mark assembly includes two pairs of height reference mar... | 03/31/1987 |
| 4650300 | Luminous source for measuring device of the ocular parameters of a subject Luminous source of device for measuring, by means of corneal reflections, the ocular parameters of a subject. The source comprises a first extended emitting zone globally annular adapted to produce on the cornea of each eye of the subject a reflection obs... | 03/17/1987 |
| 4632526 | Support structure for a spectacles frame and front intended to be adapted thereto The present invention relates to a support structure for a spectacles frame and a front intended to be adapted thereto. The support structure comprises a locking arm or shutter movable in rotation between an open position where it allows to penetrate the ... | 12/30/1986 |
| 4619505 | Refractometry process and device for measuring the degree of ametropia, and especially the degree of astigmatism, of the eye The invention concerns a process and device for measuring the degree of ametropia of an eye. The rays of a luminous source passes through a focussing lens and a test lens in order to create an image on the retina. The rays issuing from the source or from ... | 10/28/1986 |
| 4597651 | Apparatus for the detection of eye sight defects and cassette for the operation of such an apparatus The present invention relates to an apparatus for eye sight examination, allowing to test both of the patient's eyes, especially to detect his common failures and vision defects, for far and close vision, and eventually intermediary distance vision. The t... | 07/01/1986 |
