Patents Assigned to American Optical Corporation
  • Attachment for connecting a plurality of independent microscopes
    Patent number: 4244634
    Abstract: An attachment for connecting independent microscopes to permit the object under inspection in one microscope to be simultaneously viewable through other microscopes is disclosed. Optical systems are described for connecting two or three microscopes in a manner which permits an object on the stage of any of the microscopes to be viewed in all of the microscopes or selectively viewable only in the microscope having the object.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: January 13, 1981
    Assignee: American Optical Corporation
    Inventors: Joseph C. Dianetti, Robert W. Leonard
  • Convergence mechanism for binocular refracting instrument
    Patent number: 4243304
    Abstract: A mechanism which has a continuously variable amount of convergence and inward movement over the entire range of pupillary distance (PD) settings is disclosed. The repositioning of a pair of straight tracks transfers a continuously variable amount of motion to a pair of respective levers that control the position of a pair of carriages relative to the PD control and the angular relationship of lens batteries relative to the respective carriages.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: January 6, 1981
    Assignee: American Optical Corporation
    Inventor: Rato R. Buhler
  • Variable threshold R-wave detector
    Patent number: 4240442
    Abstract: An improved R-wave detector is provided for use in monitoring and/or analyzing electrical heart waveforms. Generally conventional R-wave detection means employ automatically variable scaling means for providing a threshold or reference value to a comparator which is variable not only in magnitude but also as a percentage of the average R-wave peak value from which it is derived. An ECG waveform is compared with this threshold of automatically variable percentage value and an indication of R-wave occurrence is provided when the ECG waveform exceeds the threshold. Upon an indication of R-wave occurrence, the percentage value of the threshold is rapidly increased such that a closely following T-wave of unusually large magnitude is not falsely detected as an R-wave.
    Type: Grant
    Filed: January 5, 1979
    Date of Patent: December 23, 1980
    Assignee: American Optical Corporation
    Inventors: Richard P. Andresen, Robert M. Armington, Robert L. Cannon, III, Andrew J. Griffin
  • Method and apparatus for examining and photographing the ocular fundus
    Patent number: 4238142
    Abstract: An instrument for photographing the ocular fundus is aligned by using a physical aperture designed to permit illumination of only a small area of the optic disc for minimal patient awareness of incident light and corresponding pupil dilation without mydriatics. The increased field of view and obliquity of viewing afforded by pupil dilation permits flashing of the fundus for photographic recording without image obscuring corneal reflections. The light restricting aperture is removed immediately before photographic recording.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: December 9, 1980
    Assignee: American Optical Corporation
    Inventors: William Richards, Bernard Grolman, Joseph W. Kantorski
  • Process for identification marking clear plastic articles
    Patent number: 4238524
    Abstract: A fade resistant, visually undetectable identification mark is imparted to an optically clear plastic lens or the like by providing a marking composition comprising a fluorescent dye and a liquid carrier material, and preferably including an inert sublimable solid diluent, applying the composition in a selected pattern on the surface of an article to be marked, removing the carrier material from the composition to leave a solid residue of the fluorescent dye and inert solid diluent, and permanently transferring the dye to a surface layer of the article as by heating. The mark enables a manufacturer to identify a particular article as its product by exposing it to ultraviolet radiation, yet the mark does not adversely affect the visible light optical properties of the article.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: December 9, 1980
    Assignee: American Optical Corporation
    Inventors: Norman U. LaLiberte, Don H. Rotenberg
  • Ophthalmic refracting device
    Patent number: 4236793
    Abstract: A fixture for use in refracting an aphakic eye over a properly patient fitted spectacles frame glazed with major spherical component lenses and placed in a position of use upon the patient. The fixture, having trial lens holders for right and left eye refraction, is attached to rims of the spectacles frame for establishing parallelism of the holders with the frame and provision is made for separately adjusting each right and left eye lens holder vertically and horizontally as needed for centering with a corresponding glazed lens. Refraction over the major lens in each case may be conducted with trial lenses placed in the respective holders.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: December 2, 1980
    Assignee: American Optical Corporation
    Inventors: Donald B. Whitney, Bernard Grolman, William Richards
  • Cuvette and standard holder for oximeters
    Patent number: 4236820
    Abstract: A mechanism for carrying a calibration standard and receiving a cuvette containing a blood sample to be tested is disclosed. The mechanism permits convenient shifting to either the test position or calibration position.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: December 2, 1980
    Assignee: American Optical Corporation
    Inventor: Terence Walker
  • Bright field-dark field illumination system
    Patent number: 4232937
    Abstract: An illumination system for bright field/dark field microscopy has a swinging deflector which is normally positioned on the optical axis when bright field microscopy is used and which is swung off the optical axis when dark field microscopy is used. When the deflector is swung off the optical axis an alternate illumination axis is utilized to provide a reduced portion of the observation axis having coaxial counterflowing light passing there along.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: November 11, 1980
    Assignee: American Optical Corporation
    Inventors: Krishnaiyer Swaminathan, Milton H. Sussman
  • Method of making ommateal lenses and plates
    Patent number: 4231775
    Abstract: Columnar lens elements of a crossed multi-ocular array are each formed of a rectangular preform of core glass containing a modifying oxide which is clad on each of two of its opposite sides with a glass having an affinity to ions of the modifying oxide and on remaining sides with a substantially non-reactive glass, all cladding glasses being preferentially soluble relative to the core glass. The clad preform is heated and drawn to the cross-sectional size desired of the aforesaid lens elements and cut transaxially into component lengths equal to or greater than desired for the array. A multiplicity of the cut components are tightly juxtapositioned, heated for diffusion of oxide ions into the first mentioned cladding glasses, cooled, annealed and leached free of all claddings for final crossed assembly.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: November 4, 1980
    Assignee: American Optical Corporation
    Inventor: Walter P. Siegmund
  • Seven-component microscope objective
    Patent number: 4231637
    Abstract: A seven-member microscope objective having a numerical aperture of 0.55 providing a magnification of substantially 40X in combination with a telescope objective as described in U.S. Pat. No. 3,355,234 is disclosed.
    Type: Grant
    Filed: March 22, 1979
    Date of Patent: November 4, 1980
    Assignee: American Optical Corporation
    Inventor: Milton H. Sussman
  • Coating composition
    Patent number: 4229228
    Abstract: A coating composition which results from hydrolyzing 35 to 70 weight percent tetraethyl orthosilicate and 60 to 20 weight percent of certain silane is useful for providing abrasion resisting coatings for plastics after curing. Optionally, up to 20 weight percent of a silane having a reactive polar site or, in the alternative, a small percentage of a surfactant may be used to provide a dyeable coated article.
    Type: Grant
    Filed: October 4, 1978
    Date of Patent: October 21, 1980
    Assignee: American Optical Corporation
    Inventors: Don H. Rotenberg, Patricia M. Cuffe, Bernard L. Laurin, Peter R. Ramirez
  • Gasket for casting lenses
    Patent number: 4227673
    Abstract: A gasket for a lens casting cell designed to accommodate for casting material shrinkage during curing in the cell.
    Type: Grant
    Filed: August 10, 1979
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventors: Bertram R. Goodwin, Bradford Canterbury
  • Apparatus for supporting lenses during heat treatment
    Patent number: 4227910
    Abstract: Apparatus for supporting a lens during heat treatment that has a heat-sinking material in contact with one side of a heat-conductive cover and the other side of the heat-conductive cover in contact with a portion of a lens being treated to produce photochromic behavior is disclosed. The portion of the lens in contact with the heat-conductive cover exhibits less photochromic activity than the portion of the lens which is not in contact with the heat-conductive cover.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventor: Emil W. Deeg
  • Body of a tissue culture microscope
    Patent number: D257357
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Body and illuminator of a tissue culture microscope
    Patent number: D257358
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: October 14, 1980
    Assignee: American Optical Corporation
    Inventor: John T. Armbruster
  • Pair of spectacles
    Patent number: D257435
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: October 21, 1980
    Assignee: American Optical Corporation
    Inventor: Richard M. Beane
  • Pair of spectacles
    Patent number: D257436
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: October 21, 1980
    Assignee: American Optical Corporation
    Inventor: Richard M. Beane
  • Pair of spectacles
    Patent number: D257854
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: January 13, 1981
    Assignee: American Optical Corporation
    Inventor: Richard M. Beane
  • Pair of spectacles
    Patent number: D257855
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: January 13, 1981
    Assignee: American Optical Corporation
    Inventor: Richard M. Beane
  • Combined lens cabinet and writing desk
    Patent number: D257881
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: January 13, 1981
    Assignee: American Optical Corporation
    Inventor: Stephen U. Winig