Patents by Inventor Doug Harwood

Doug Harwood 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: 7235785
    Abstract: A plurality of temperature dependent focal plane arrays operate without a temperature stabilization cooler and/or heater over a wide range of ambient temperatures. Gain, offset and/or bias correction tables are provided in a flash memory in memory pages indexed by the measured temperature of the focal plane arrays. The memory stores a calibration database, which is accessed using a logic circuit which generates a memory page address from a digitized temperature measurement of each of the focal plane array. The calibration database is comprised of an array of bias, gain and offset values for each pixel in the focal plane array for each potential operating temperature over the entire range of potential operating temperatures. The bias, gain and offset data within the database are read out, converted to analog form, and used by analog circuits to correct the focal plane array response.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: June 26, 2007
    Assignee: Irvine Sensors Corp.
    Inventors: Bert Hornback, Doug Harwood, W. Eric Boyd, Randy Carlson
  • Publication number: 20050205785
    Abstract: A plurality of temperature dependent focal plane arrays operate without a temperature stabilization cooler and/or heater over a wide range of ambient temperatures. Gain, offset and/or bias correction tables are provided in a flash memory in memory pages indexed by the measured temperature of the focal plane arrays. The memory stores a calibration database, which is accessed using a logic circuit which generates a memory page address from a digitized temperature measurement of each of the focal plane array. The calibration database is comprised of an array of bias, gain and offset values for each pixel in the focal plane array for each potential operating temperature over the entire range of potential operating temperatures. The bias, gain and offset data within the database are read out, converted to analog form, and used by analog circuits to correct the focal plane array response.
    Type: Application
    Filed: January 31, 2005
    Publication date: September 22, 2005
    Inventors: Bert Hornback, Doug Harwood, W. Boyd, Randolph Carlson