Patents by Inventor Byung Jin Chang

Byung Jin 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: 11112090
    Abstract: A head-mountable light includes a user-adjustable spot size. Light from an LED travels through beam-forming optical elements supported at the front opening of a housing to form a spot of light at a working distance. An adjustable iris, situated between the LED and the beam forming optical elements, enables a user to adjust the iris and vary the size of the aperture and the spot size of the light at the working distance. The manually operated iris size control may comprise a rotatable ring on the exterior of the housing, and the plurality of beam-forming optical elements may comprise a singlet lens followed by a doublet lens. The light from the LED strikes the beam-dispersing element directly without an intervening condensing optical element (i.e., condensing lens). The assembly further includes a mechanical connector adapted to couple the housing to a pair of eyeglass frames, headband or other head-worn structure.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: September 7, 2021
    Assignee: General Scientific Corp./Surgitel
    Inventor: Byung Jin Chang
  • Patent number: 8068169
    Abstract: A video camera system includes a mount with a clip-on structure adapted for attachment to a pair of eyeglass frames, loupes, or a headband. The preferred embodiment includes a camera mounted on a first pivot arm, and a light source mounted on a second pivot arm. One or both of the pivot arms are rotatable, enabling the beam from the light source and field of view of the camera to be aligned for a given working distance. Polarizing filters may be mounted to the camera, light source, or both to control glare, reflection or other undesired visual artifacts.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: November 29, 2011
    Assignee: General Scientific Corporation
    Inventor: Byung Jin Chang
  • Publication number: 20110013277
    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: Application
    Filed: August 30, 2010
    Publication date: January 20, 2011
    Applicant: General Scientific Corporation
    Inventors: Thomas Cummings, Byung Jin Chang
  • Patent number: 7791798
    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: June 8, 2006
    Date of Patent: September 7, 2010
    Assignee: General Scientific Corporation
    Inventors: Thomas Cummings, Byung Jin Chang
  • Patent number: 7673989
    Abstract: An improvement upon telemicroscopic loupes of the type which are adjustably mounted to an eyeglass frame, headmount or through-lens designs. The preferred embodiment includes a cap including an optical element to adjust for the working distance of a loupe. The cap may be frictionally fit onto the loupe or threadably attached to the loupe body. According to an alternative embodiment, one or more eyepiece components may be used alone or in combination with the end cap for adjusting prescription and/or working distance.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: March 9, 2010
    Assignee: General Scientific Corporation
    Inventor: Byung Jin Chang
  • Patent number: 7641335
    Abstract: The entire front portion of eyeglass frames for medical, surgical or dental applications are constructed from a solid piece of machined metal, preferably titanium. This results in no welding of the nose bridge, resulting in a one-piece frame that is substantially more stable than existing designs. In a preferred embodiment, the basic shape is cast or stamped from plate stock from titanium, then machined down, if necessary, to a desired finished product. Holes are provided on the bridge portion for the mounting of medical, surgical or dental optics or other accessories.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: January 5, 2010
    Assignee: General Scientific Corporation
    Inventor: Byung Jin Chang
  • Patent number: 7465078
    Abstract: A heat-dissipating headlamp assembly comprises a housing including a light source such as a light-emitting diode (LED) disposed therein, and a detachable heat shroud covering the rearward portion of the housing. In the preferred embodiment the housing includes a pair of opposing detents, and the detachable heat shroud includes a pair of opposing protrusions that cooperate with the detents to hold the shroud in position. The assembly further includes a mounting bracket extending downwardly from the rearward portion for attachment to a headband, spectacle frames, or other head-worn item, and the heat shroud includes an upper rearward notch to accommodate the electrical cable connected to the light source and a lower rearward notch to accommodate the mounting bracket. The heat shroud is generally cylindrical in shape, and so, too, is the housing, at least where the heat shroud attaches thereto.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: December 16, 2008
    Assignee: General Scientific Corporation
    Inventor: Byung Jin Chang
  • Publication number: 20080204589
    Abstract: A video camera system includes a mount with a clip-on structure adapted for attachment to a pair of eyeglass frames, loupes, or a headband. The preferred embodiment includes a camera mounted on a first pivot arm, and a light source mounted on a second pivot arm. One or both of the pivot arms are rotatable, enabling the beam from the light source and field of view of the camera to be aligned for a given working distance. Polarizing filters may be mounted to the camera, light source, or both to control glare, reflection or other undesired visual artifacts.
    Type: Application
    Filed: April 27, 2007
    Publication date: August 28, 2008
    Inventor: Byung Jin Chang
  • Publication number: 20070285772
    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: Application
    Filed: June 8, 2006
    Publication date: December 13, 2007
    Inventors: Thomas Cummings, Byung Jin Chang
  • Patent number: 6513929
    Abstract: Ergonomic eyeglass frames are particularly suited to surgical, medical and dental applications. A set of eyeglass frames having a temple portion and lenses arranged in a plane, whereby the angle between the temple portion and the lens plane defines a pantascoptic angle. A pair of surgical telescopes or loupes are mounted through a lower portion of one of the respective eyeglass frames, with the pantascoptic angle preferably being 80 degrees or less to provide a more stable physical mounting of the telescope or loupe through the lower portion of each lens element.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: February 4, 2003
    Inventor: Byung Jin Chang
  • Patent number: 6493136
    Abstract: An optical accessory of the type used by medical professionals is coupled to a clip-on mount, enabling the assembly to be used with ordinary eyeglass frames. The assembly may be used with specialized frames, in which case the clip-on mount may be removed for a more permanent mounting of the assembly directly to the bridge area of the eyeglass frames. In different implementations, optical accessories in the form of ocular loupes, head lamps, and miniaturized video cameras may be accommodated according to the invention.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: December 10, 2002
    Assignee: General Scientific Corp.
    Inventors: Byung Jin Chang, Thomas A. Cummings
  • Publication number: 20020159024
    Abstract: Ergonomic eyeglass frames are particularly suited to surgical, medical and dental applications. A set of eyeglass frames having a temple portion and lenses arranged in a plane, whereby the angle between the temple portion and the lens plane defines a pantascoptic angle. A pair of surgical telescopes or loupes are mounted through a lower portion of one of the respective eyeglass frames, with the pantascoptic angle preferably being 80 degrees or less to provide a more stable physical mounting of the telescope or loupe through the lower portion of each lens element.
    Type: Application
    Filed: May 20, 2002
    Publication date: October 31, 2002
    Inventor: Byung Jin Chang
  • Publication number: 20020126255
    Abstract: Ergonomic eyeglass frames are particularly suited to surgical, medical and dental applications. A set of eyeglass frames having a temple portion and lenses arranged in a plane, whereby the angle between the temple portion and the lens plane defines a pantascoptic angle. A pair of surgical telescopes or loupes are mounted through a lower portion of one of the respective eyeglass frames, with the pantascoptic angle preferably being 80 degrees or less to provide a more stable physical mounting of the telescope or loupe through the lower portion of each lens element.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 12, 2002
    Inventor: Byung Jin Chang
  • Publication number: 20020126376
    Abstract: An optical accessory of the type used by medical professionals is coupled to a clip-on mount, enabling the assembly to be used with ordinary eyeglass frames. The assembly may be used with specialized frames, in which case the clip-on mount may be removed for a more permanent mounting of the assembly directly to the bridge area of the eyeglass frames. In different implementations, optical accessories in the form of ocular loupes, head lamps, and miniaturized video cameras may be accommodated according to the invention.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 12, 2002
    Inventors: Byung Jin Chang, Thomas A. Cummings
  • Patent number: 6369964
    Abstract: Viewing apparatus, for medical and surgical practitioners incorporating one or more optical filters, each exhibiting a reverse photopic response, such that green light is at least partially attenuated, whereas red and blue light are both substantially transmitted. The invention includes means for supporting one or more optical filters in the practitioner's field of view, such as a pair of eyeglass frames or endoscope mounting for use, for example, in conjunction with laparoscopic surgery. Various technologies may be employed to realize a desired reverse photopic response, including absorptive dyes, dielectric layers, and/or holograms.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: April 9, 2002
    Assignee: General Scientific Corporation
    Inventor: Byung Jin Chang
  • Patent number: 6340228
    Abstract: A formable nose pad distributes the weight of eyeglasses and accessories supported by the eyeglass frames over a large area of the wearer's nose. The nose pad has two inner tabs that can be formed to fit the wearer's nose, outer tabs that can be formed to fit the undersides of the eyeglass lenses and a flange through which the nose pad is attached to the eyeglass bridge. Slotted screw holes on the flange allow for height adjustment to fit the height of the wearer's nose.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: January 22, 2002
    Assignee: General Scientific Corporation
    Inventors: Thomas A. Cummings, David Nowak, Byung Jin Chang
  • Patent number: 6333814
    Abstract: An improved ocular mounting assembly having a pair of ocular support arms which can be extended by sliding out of a box-section assembly housing for supporting a pair of ocular devices attached to the ends of the support arms. The improvement is a pair of stabilizers disposed inside the assembly housing and providing stability against rotational motion when the arms are extended. In one embodiment, the stabilizers are interference-fitted balls, retained in position by retainer holes in the assembly housing, and receding into recess cut-outs at the end of the support arms when the arms are fully retracted. In an alternate embodiment, the stabilizers are L-shaped, and can be either an integral part of the housing or bonded to it with adhesive.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: December 25, 2001
    Assignee: General Scientific Corporation
    Inventors: Byung Jin Chang, Thomas Cummings
  • Patent number: 6039461
    Abstract: A compact, high-intensity light assembly including a substantially hollow shell having a distal end from which the light emerges and a proximal end into which a base unit inserts. A lamp guide holds the light source in a central position within the shell using a spring which urges a rear portion of the lamp guide against an annular seating lip on the base unit. The lamp guide preferably includes a necked-down portion having an inner surface which makes holding contact with the outer surface of the light source, and an outer surface including heat-radiating features. In a preferred embodiment, the base unit is insertable into the proximal end of the shell by way of a threaded connection, enabling the lamp guide and light source to be adjustably moved relative to the distal end of the shell so as to focus the light from the source into a preferred illumination area.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: March 21, 2000
    Assignee: General Scientific Corporation
    Inventors: Tom Cummings, David Nowak, Byung Jin Chang
  • Patent number: 5920371
    Abstract: A versatile optical mounting assembly utilizes a headband mount having a forward portion and a vertical member having upper and lower ends. The forward portion of the headband mount includes a slide assembly which receives the upper end of the vertical member, allowing the vertical member to be vertically adjusted and locked into place once a desired position is achieved. A multiple-degree-of freedom clamp assembly is further provided to connect the lower end of the vertical member to the top edge of the eyeglass frames, facilitating first and second rotational movements about separate axes. The invention may also be used in conjunction with an ocular mounting assembly, in which case a slide rail is centrally attached to the eyeglass frames at a point proximate to where the clamp assembly connects the lower end of the vertical member to the top edge of the eyeglass frames.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: July 6, 1999
    Inventors: Byung Jin Chang, David Nowak
  • Patent number: 5870166
    Abstract: An optical mounting assembly includes a frame, preferably in the form of a shaped wire form, having a proximal section attachable to a headband or to the bridge portion of a pair of eyeglass frames, a mid-section extending downwardly along and in spaced-apart conformity with the ridge of a user's nose, and a distal section which is bent upwardly with respect to the mid section. Optionally, the mid-section may include an adjustable nose pad which is adapted to make contact against the ridge of the user's nose. This provides for improved weight distribution, with the distal section being configured to mountably receive one of a variety of accessories such as light sources, imaging apparatus, face shields, etc.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: February 9, 1999
    Inventors: Byung Jin Chang, David Nowak