Patents by Inventor David Charles Lehnen

David Charles Lehnen 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).

  • Method and apparatus for visually inspecting an object
    Patent number: 6404912
    Abstract: A pickup tool (30) has reflective surfaces (42, 44, 46, 48) attached thereto. The pickup tool (30) picks up an object (38) and moves the object (38) over a light source (51). The reflective surfaces (42, 44, 46, 48) reflect a light beam (61) emitted from the light source (51), generating deflected light beams (63, 65, 67, 69) which back light the object (38). The deflected light beams (63, 65, 67, 69) form silhouette images of the object (38) in cameras (52, 54, 56, 58). A visual inspection of the object (38) is performed by analyzing the images.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: June 11, 2002
    Assignee: Motorola, Inc.
    Inventors: David Charles Lehnen, Christopher John LeBeau, Tonya Marie Twine
  • Method and apparatus for visually inspecting an object
    Patent number: 6160906
    Abstract: A pickup tool (30) has reflective surfaces (42, 44, 46, 48) attached thereto. The pickup tool (30) picks up an object (38) and moves the object (38) over a light source (51). The reflective surfaces (42, 44, 46, 48) reflect a light beam (61) emitted from the light source (51), generating deflected light beams (63, 65, 67, 69) which back light the object (38). The deflected light beams (63, 65, 67, 69) form silhouette images of the object (38) in cameras (52, 54, 56, 58). A visual inspection of the object (38) is performed by analyzing the images.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: December 12, 2000
    Assignee: Motorola, Inc.
    Inventors: David Charles Lehnen, Christopher John LeBeau, Tonya Marie Twine
  • Apparatus and method for acquiring multiple images
    Patent number: 5982493
    Abstract: An image station (40) includes multiple light sources (43, 45, 47, 49) emitting lights of different colors to illuminate an object (41) from different directions, thereby forming multiple images of the object (41). Dichroic filters (54, 56, 58) separate lights of different colors from each other. Lights of different colors form images of the object (41) in corresponding cameras (53, 55, 57, 59) simultaneously.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: November 9, 1999
    Assignee: Motorola, Inc.
    Inventors: David Charles Lehnen, Christopher John LeBeau
  • Method and apparatus for generating a stereoscopic image
    Patent number: 5917655
    Abstract: To generate a stereoscopic image of an object (41), two light beams (151, 161) unparallel to each other are used to back light a portion (43) of the object (41). The two light beams (151, 161) are deflected to form two deflected light beams (153, 163) substantially parallel to each other. The deflected light beams (153, 163) form a stereoscopic image of the portion (43) of the object (41). A camera (46) records the stereoscopic image of the object (41). The signal from the camera (46) is processed by a vision computer (48) to reconstruct the stereoscopic image and determine whether the object (41) meets design specifications.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: June 29, 1999
    Assignee: Motorola, Inc.
    Inventors: David Charles Lehnen, Marcus J. Gering