Patents by Inventor Leslie P. Dudley

Leslie P. Dudley 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: 4159163
    Abstract: Optical assemblies are disclosed for use in producing an effect of three-dimensional relief in the projection of a still photograph or motion picture film by means of polarized light, each still photograph or frame of the motion picture film comprising a single, regular, two-dimensional image. In order to produce the effect of three-dimensional relief the projector is provided with an optical assembly consisting of a lens and a beam-splitting polarizing device located inside the lens barrel which results in the projection of two oppositely polarized and laterally separated images of the photograph or each frame of motion picture film. The screen is of the non-depolarizing type and the images are seen in three-dimensional relief when viewed through polarizing spectacles.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: June 26, 1979
    Inventor: Leslie P. Dudley
  • Patent number: 4131342
    Abstract: An optical viewing system and method is described, whose operating principles are based on two psycho-physiological characteristics of the human visual system. One of these characteristics is the time delay between the arrival of a light stimulus or image on the retina of the eye and its recognition or interpretation at the visual cortex. The other characteristic is the non-achromatism of the eye. The first of these characteristics manifests itself in the so-called Pulfrich illusion, a moving object being apparently displaced from its actual path when viewed by an observer with a neutral filter in front of one eye, as differential visual time-lag results from the difference in brightness of the two retinal images. The second characteristic manifests itself in the so-called chromostereoscopic effect which, under certain conditions, creates the illusion that differently colored objects, although actually at the same distance from an observer, are at different distances from him.
    Type: Grant
    Filed: December 14, 1976
    Date of Patent: December 26, 1978
    Inventor: Leslie P. Dudley
  • Patent number: 4072967
    Abstract: An improved system is provided for converting monocular microscopes to the stereoscopic mode with the aid of polarizing filters or color filters. The embodiment of the system illustrated herein includes means by which the specimen under examination can be viewed by stereo projection. The system may include means by which stereo photomicrography on black-and-white or color film can be easily and effectively accomplished; and it may include means for transmitting stereo microscopic images by television.
    Type: Grant
    Filed: May 4, 1976
    Date of Patent: February 7, 1978
    Inventor: Leslie P. Dudley