Patents by Inventor Carl S. H. Enequist

Carl S. H. Enequist 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 producing a measured value indicative of focusing correctly adjusted sharpness at projected pictures
    Patent number: 5123727
    Abstract: The present invention relates to a method and apparatus for carrying out the focusing of projected images. To carry out such focusing, an image sensor operates on a small section of the projected image to blow it up to a point where only the grains of the image become larger than the resolution of the sensor. The image set obtained is electronically scanned so that a signal is received which includes a low frequency band determined by the grain density and a harmonic span generated by the transitions between grains and interstices, whereby a differential voltage is created which is indicative of the state of focusing.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: June 23, 1992
    Inventor: Carl S. H. Enequist