Patents by Inventor Byung J. Chang

Byung J. Chang 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).

  • Patent number: 9383077
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface. A conical mirror may be disposed between the LED and the singlet lens to increase the light collection efficiency of the LED.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: July 5, 2016
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Patent number: 9273836
    Abstract: A head-mounted light source particularly suited to medical and dental applications includes a base unit with a source of illumination directed through a distal opening in the base unit, and a plurality of interchangeable beam-forming units, each separately attachable to the distal opening of the base unit to produce a different light spot size at a given distance. The preferred embodiment includes a wide-field beam-forming unit, an intermediate beam-forming unit and a high-intensity beam-forming unit, such that the diameter of the spot size progressively decreases from the wide-field to the intermediate to the high-intensity unit. The interchangeable beam-forming units are attached to the base unit through a threaded connection. Each interchangeable beam-forming unit may itself include a distal threaded connection for attachment of a UV or other filter. In the preferred embodiment, the base unit includes a clip adapted for attachment to an ocular mounting assembly.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: March 1, 2016
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Patent number: 9052455
    Abstract: An improved head-mounted optical illuminator or magnifier of the type worn by a medical or dental professional includes an optical coating applied to one or more optical surfaces associated with the illuminator or magnifier, and wherein the optical coating is a rejection coating operative to blocks wavelengths in the green, blue, violet and/or ultraviolet portions of the electromagnetic spectrum, depending upon the embodiment. Short-wavelength coatings (blue/violet/uv) may be applied to the surface of a lens used in a head-worn illuminator, for example to the beam-forming optics. The head-worn illuminator may be an LED illuminator, xenon illuminator, or other high-intensity source. In the case of the green notch filter coatings, these would typically only be applied to a head-worn magnifier, including flip-up and through-the-lens styles. In all embodiments, the optical coating may be a multilayer dielectric coating, a holographic filter, or utilize other optical filter technology.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: June 9, 2015
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20150146290
    Abstract: Dental/medical/surgical loupes have an improved declination angle to reduce neck and back strain. Eyeglass frames are provided with carrier lenses having bottom edges. A hole is provided in each carrier lens, each hole having an outer periphery that extends below the bottom edge of the carrier lens, resulting in a pair of opposing pointed ends. A pair of ocular devices are cemented in a respective one of the holes, such that a portion of the ocular body also extends below the bottom edge of the carrier lens. Each ocular is then cemented or otherwise permanently affixed into position to achieve a desired declination angle. For added stability, a pair of holes may be formed into the body of each ocular, each pair of holes being physically aligned with the two opposing pointed ends of the carrier lens associated with that ocular.
    Type: Application
    Filed: November 26, 2014
    Publication date: May 28, 2015
    Inventor: Byung J. Chang
  • Patent number: 8964291
    Abstract: An ocular mounting assembly with mechanical stabilization includes a housing with a through-bore having an interior and opposing open ends, the interior of the through-bore being defined in part by an upper wall having a lower surface interior to the through-bore, and a lower wall having an upper surface interior to the through-bore. A pair of support arms are provided, each arm being slidingly received by a respective one of the open ends of the through-bore of the housing. A pair of stabilizing bodies are also provided, each body being positioned between a respecting one of the support arms and the interior of the housing. In contrast to existing designs, both stabilizing bodies are either positioned between a support arm and the lower surface of the upper wall of the housing, or between a support arm and the upper surface of the lower wall of the housing.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: February 24, 2015
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20150003048
    Abstract: A headlight incorporates an infrared sensor enabling the light to be turned ON and OFF without physical contact. The system includes a light source and a mechanism for coupling the light source to eyeglass frames or to a headband. A power supply and control unit is disposed remotely from the light source and is interconnected to the light source through an electrical cable. An infrared (IR) motion sensor is interconnected to the power supply and control unit, and electrical circuitry within the power supply and control unit is operative to turn the light source ON and OFF is response to the detection of a hand or other body part by the sensor. In the preferred embodiment, the light source includes a light-emitting diode (LED), and the IR detector is a passive IR pyroelectric sensor. The IR sensor may be attached to clothing, eyeglass frames, a headband, or the light source itself.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Applicant: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20150003049
    Abstract: A headlight incorporates an infrared sensor enabling the light to be turned ON and OFF without physical contact. The system includes a light source and a mechanism for coupling the light source to eyeglass frames or to a headband. A power supply and control unit is disposed remotely from the light source and is interconnected to the light source through an electrical cable. An infrared (IR) motion sensor is interconnected to the power supply and control unit, and electrical circuitry within the power supply and control unit is operative to turn the light source ON and OFF is response to the detection of a hand or other body part by the sensor. In the preferred embodiment, the light source includes a light-emitting diode (LED), and the IR detector is user-adjustable to set the ON/OFF activation distance in accordance with user preferences.
    Type: Application
    Filed: June 12, 2014
    Publication date: January 1, 2015
    Inventor: Byung J. Chang
  • Patent number: 8913318
    Abstract: In an ocular support assembly material present in the forward-looking cross-section of the outwardly extending support arms is removed, thereby reducing visual obscuration and enhancing peripheral vision. In the preferred embodiment, the top of each outwardly extending support arm is at or below the middle of the height of the housing, thereby resulting in a low-profile design. At the same time, the support arms are received by the housing with sliding engagement on all sides, thereby eliminating the need for ball bearings or spacers to counteract twisting. The result is a lightweight yet highly stable ocular mounting assembly.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: December 16, 2014
    Assignee: General Scientific Corporation
    Inventors: Thomas A Cummings, Byung J. Chang
  • Publication number: 20140293588
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface. A conical mirror may be disposed between the LED and the singlet lens to increase the light collection efficiency of the LED.
    Type: Application
    Filed: June 12, 2014
    Publication date: October 2, 2014
    Inventor: Byung J. Chang
  • Publication number: 20140247582
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface. A conical mirror may be disposed between the LED and the singlet lens to increase the light collection efficiency of the LED.
    Type: Application
    Filed: March 3, 2014
    Publication date: September 4, 2014
    Applicant: GENERAL SCIENTIFIC CORPORATION
    Inventor: Byung J. Chang
  • Patent number: 8662709
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: March 4, 2014
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20130094081
    Abstract: An ocular mounting assembly with mechanical stabilization includes a housing with a through-bore having an interior and opposing open ends, the interior of the through-bore being defined in part by an upper wall having a lower surface interior to the through-bore, and a lower wall having an upper surface interior to the through-bore. A pair of support arms are provided, each arm being slidingly received by a respective one of the open ends of the through-bore of the housing. A pair of stabilizing bodies are also provided, each body being positioned between a respecting one of the support arms and the interior of the housing. In contrast to existing designs, both stabilizing bodies are either positioned between a support arm and the lower surface of the upper wall of the housing, or between a support arm and the upper surface of the lower wall of the housing.
    Type: Application
    Filed: August 9, 2012
    Publication date: April 18, 2013
    Applicant: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20120320454
    Abstract: An improved head-mounted optical illuminator or magnifier of the type worn by a medical or dental professional includes an optical coating applied to one or more optical surfaces associated with the illuminator or magnifier, and wherein the optical coating is a rejection coating operative to blocks wavelengths in the green, blue, violet and/or ultraviolet portions of the electromagnetic spectrum, depending upon the embodiment. Short-wavelength coatings (blue/violet/uv) may be applied to the surface of a lens used in a head-worn illuminator, for example to the beam-forming optics. The head-worn illuminator may be an LED illuminator, xenon illuminator, or other high-intensity source. In the case of the green notch filter coatings, these would typically only be applied to a head-worn magnifier, including flip-up and through-the-lens styles. In all embodiments, the optical coating may be a multilayer dielectric coating, a holographic filter, or utilize other optical filter technology.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 20, 2012
    Applicant: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20120320568
    Abstract: A head-mounted light source particularly suited to medical and dental applications includes a plurality of light-emitting diodes (LEDs). The LEDs include at least one cool white LED; at least one warm white LED; and at least one red LED. By combining a cool white, warm white and red LED, a more natural spectrum is produced. In one preferred embodiment, the system includes a single cool white LED, a single warm white LED, and a single red LED. In an alternative embodiment, the system includes 3 warm white LEDs, 2 cool white LEDs and 2 red LEDs which may be arranged in a hexagonal close-packed pattern.
    Type: Application
    Filed: June 17, 2011
    Publication date: December 20, 2012
    Applicant: General Scientific Corporation
    Inventor: Byung J. Chang
  • Patent number: 8120847
    Abstract: A medical/dental loupe assembly provides through-the-lens oculars with an inconspicuous interpupillary distance adjustment capability. The system includes a pair of lenses, each lens having a telemicroscopic ocular cemented therethrough, and an upper portion, one on each side of a wearer's nose. A generally horizontal slot is formed in the upper portion of one of the lenses, and a bridge member connects the upper portions of the two lenses. The bridge member has two ends, one end of which is coupled to the slot through a fastener that may be loosened and tightened, thereby allowing the distance between the oculars to be adjusted and locked into position in accordance with the interpupillary requirements of a user.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: February 21, 2012
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Publication number: 20110305007
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example. In the preferred embodiment, the achromatic doublet lens, the singlet lens, or both the singlet and the doublet lens have a planar surface.
    Type: Application
    Filed: August 24, 2011
    Publication date: December 15, 2011
    Inventor: Byung J. Chang
  • Patent number: 8047684
    Abstract: An improved illuminator with an adjustable beam pattern to be worn by medical and dental professionals includes a housing, a light-emitting diode (LED) disposed in the housing outputting light through a distal opening in the housing, an achromatic doublet lens mounted in the opening in the housing, and a singlet lens disposed between the LED and the achromatic lens. The distance between the singlet lens and the doublet lens may be adjustable, and/or distance between the LED and the singlet lens may be adjustable, through a threaded connections, for example.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: November 1, 2011
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Patent number: D649571
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: November 29, 2011
    Assignee: General Scientific Corporation
    Inventors: Thomas A Cummings, Byung J. Chang
  • Patent number: D682450
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: May 14, 2013
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang
  • Patent number: D746354
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: December 29, 2015
    Assignee: General Scientific Corporation
    Inventor: Byung J. Chang