Patents by Inventor Alan W. Holmes

Alan W. Holmes 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: 7920324
    Abstract: A system and method for telescope guiding requires creating an artificial reference star which is locked to the line of sight of the imaging means of a main telescope in the field-of-view (FOV) of a guide scope. A real guide star is selected using the guide scope, such that both artificial and guide stars are within the FOV of the guide scope. Guiding is accomplished by varying the line of sight such that the positional displacement between the guide and artificial stars on the guide star's focal plane is maintained approximately constant. The artificial star is created by generating a point source of light near the main scope's imaging means, directing the light outside the main scope and retroreflecting it at the same direction angle of the beam exiting the aperture into the guide scope, effectively locking the guide scope to the line of sight of the imaging means.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 5, 2011
    Assignee: Aplegen, Inc.
    Inventor: Alan W. Holmes
  • Publication number: 20080259448
    Abstract: A system and method for telescope guiding requires creating an artificial reference star which is locked to the line of sight of the imaging means of a main telescope in the field-of-view (FOV) of a guide scope. A real guide star is selected using the guide scope, such that both artificial and guide stars are within the FOV of the guide scope. Guiding is accomplished by varying the line of sight such that the positional displacement between the guide and artificial stars on the guide star's focal plane is maintained approximately constant. The artificial star is created by generating a point source of light near the main scope's imaging means, directing the light outside the main scope and retroreflecting it at the same direction angle of the beam exiting the aperture into the guide scope, effectively locking the guide scope to the line of sight of the imaging means.
    Type: Application
    Filed: April 19, 2007
    Publication date: October 23, 2008
    Inventor: Alan W. Holmes
  • Patent number: 5525793
    Abstract: An optical head for attachment to an optical system, such as a telescope, is shown. The optical head in a housing includes a first sensor for imaging an object in a field of view and a second sensor for tracking a star or other celestial body which is off axis to the field of view of the first sensor. The second sensor is rigidly supported and positioned a selected distance from and adjacent to the first sensor and is adapted to generate correction signals which are used to control a drive system of the optical system or telescope. The correction signals are representative of desired changes in the relative position of the optical system or telescope to the star being tracked. The correction signals are applied to the drive system to maintain, during imaging, optical alignment of the first sensor with an object in the field of view. In the preferred embodiment, the optical head is used for astronomical imaging and tracking wherein the first sensor is an imaging CCD and the second sensor is a tracking CCD.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: June 11, 1996
    Assignee: Santa Barbara Instrument Group
    Inventors: Alan W. Holmes, Matthew J. Longmire
  • Patent number: 5365269
    Abstract: An optical image (54) of an astronomical scene is focussed by a telescope (16) onto a charge-coupled-device (CCD) photosensor array (50) to produce successive electronic pixel images (92) of the scene which are registered and co-added to produce an accumulated image (96) which is substantially free of streaking caused by rotation of the earth. A current image (92) is registered with an accumulated image (94) by sensing the coordinates of a selected bright star (90) in both images (92,94), computing the offset .DELTA.I between the coordinates, and shifting the current image (92) by the offset .DELTA.I prior to addition to the accumulated image. The telescope (16) may have a clock drive (24) to which the offset .DELTA.I is also applied to correct for mechanical tracking errors.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: November 15, 1994
    Assignee: Santa Barbara Instrument Group, Inc.
    Inventors: Alan W. Holmes, Mathew J. Iongmire
  • Patent number: 5258609
    Abstract: A wide field-of-view optical element 12 suitable for use in a laser warning system including a frusto-conical block of optically transparent material having a first surface 14 and a second surface 16. The first surface 14 is parallel with the second surface 16 and coaxial therewith. The radius R.sub.1 of the first surface 14 is less than the radius R.sub.2 of the second surface such that the sides of the element 12 are slanted. Reflective material is coated on the interior 17 of the first surface 14 for directing incident optical energy toward a detector 20 mounted at the second surface 16. Similarly, a reflective material is coated on the interior 18 of the second surface 16 for directing incident optical energy to the detector 20 via the first surface 14. The second reflective coating on the second surface is disposed between the outer periphery thereof and a nonzero distance R.sub.3 from the center thereof to provide an aperture at which the detector 20 may be mounted.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: November 2, 1993
    Assignee: Santa Barbara Research Center
    Inventor: Alan W. Holmes
  • Patent number: 5220165
    Abstract: A radiation detector capable of withstanding illumination by relatively concentrated electromagnetic energy is disclosed herein. The radiation detection system 10 of the present invention includes a sensor assembly 14 for generating radiant energy upon illumination by incident electromagnetic radiation R. The sensor assembly 14 will preferably include a sheet of metallic foil 24 for emitting the radiant energy into a sensor chamber defined by the assembly 14. The inventive radiation detection system 10 further includes an optical fiber cable 18 in communication with the sensor chamber. Radiant energy from within the sensor chamber is guided by the fiber cable 18 to a shielded detector arrangement 20 disposed to provide a detection signal indicative of the intensity of the incident electromagnetic radiation R.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: June 15, 1993
    Assignee: Santa Barbara Research Center
    Inventor: Alan W. Holmes
  • Patent number: 4881070
    Abstract: Meters having a plurality of rotating dials are read automatically by using radiant energy to sense the angular positions of the dials. A single radiant energy detector is time-shared among the several dials to reduce the cost of the meter reading apparatus. The meter can transmit meter readings and other information to remote locations. It can also receive, store, and act upon information received from remote locations. The meter can measure short-term demand, and can produce output signals for indicating and/or controlling demand.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: November 14, 1989
    Assignee: Energy Innovations, Inc.
    Inventors: David E. Burrowes, Alan W. Holmes
  • Patent number: 4855588
    Abstract: A wide-field optical receiver element for determining the direction of a distant source of electromagnetic radiation. A cylindrical reflecting surface is used in an off-axis configuration to produce line images corresponding to sources over the field of view. A planar detector is located at a plane at or near positions where the line images over the field of view are produced, so that a component of the angular direction of the source can be determined from the position of the line image on the detector.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: August 8, 1989
    Assignee: Santa Barbara Research Center
    Inventor: Alan W. Holmes
  • Patent number: 4646084
    Abstract: Meters having a plurality of rotating dials are read automatically by using radiant energy to sense the angular positions of the dials. A single radiant energy detector is time-shared among the several dials to reduce the cost of the meter reading apparatus. The meter can transmit meter readings and other information to remote locations. It can also receive, store, and act upon information received from remote locations. The meter can measure short-term demand, and can produce output signals for indicating and/or controlling demand.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: February 24, 1987
    Assignee: Energy Innovations, Inc.
    Inventors: David E. Burrowes, Alan W. Holmes
  • Patent number: 4587513
    Abstract: Apparatus and method for non-contact determination of shaft angle utilizes a patterned disc secured to the shaft or other rotor being observed. The disc has sectors of different optical properties whereby radiant energy directed to the disc will be encoded by the sectored pattern. A set of detectors, which each correspond to one of the sectors, provides variable output signals according to the amount of radiant energy attenuated by the disc and directed onto the detectors. These signals are converted to a set of digital signals which define a unique rotational position, and a computing means calculates angular position from these signals. The computing means will, if necessary, compare the digital output signals and then calculate angular position in a manner which is insensitive to small decenters (or lack of concentricity) in the arrangement of the shaft, disc, detectors, and any associated optical system.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: May 6, 1986
    Assignee: Energy Innovations, Inc.
    Inventors: David E. Burrowes, Alan W. Holmes, Daniel R. Valentine