Patents by Inventor Ernst Rothe

Ernst Rothe 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).

  • Scanning system
    Patent number: 6084698
    Abstract: Disclosed is a scanning system havinga light source,a collimator lens,a scanning unit anda scanning objective. The present invention is distinguished by that for the correction of the chromatic aberration over a large wavelength range, only the transverse chromatic aberration of the scanning objective is corrected, and that the intersection lengths of the light rays having wavelengths in the wavelength range over which the scanning system is to be corrected chromatically is dimensioned after the collimator lens in such a manner that the longitudinal chromatic aberration of the scanning system is compensated as well.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: July 4, 2000
    Assignee: Optische Werke G. Rodenstock
    Inventors: Jakob Bleicher, Ernst Rothe, Manfred Knote, Wolfgang Riedel
  • Objective of great overall length
    Patent number: 4815834
    Abstract: An objective of great overall length having two lens groups with a positive lens power and an aperture disposed in front of or within of the first lens group. The first lens group includes a positive lens and a negative lens. The second lens group has at least four lens components with lens powers of positive, negative, positive and negative, respectively the distance between the two lens groups being greater than the focal length of the objective. Additionally, the lens components of the second lens group satisfy the following conditions:R.sub.21 <fR.sub.26 <f/2-R.sub.29 <fwhereinR.sub.21 is the radius of curvature of the front surface of the first lens component;R.sub.26 is the radius of curvature of the back surface of the second lens component;R.sub.29 is the radius of curvature of the front surface of the fourth element lens component; andf is the focal length of the objective.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: March 28, 1989
    Assignee: Optische Werke G. Rodenstock
    Inventor: Ernst Rothe
  • Scanning objective
    Patent number: 4645311
    Abstract: A scanning objective with two optical elements, which includes at least one aspherical surface; the aspherical surface is so constructed that in comparison with a spherical surface with the same vertex radius of curvature, the thickness of the lens increases toward the outside. By this construction of the aspherical surface in accordance with the present invention, for example, a scanning objective with two lenses and an aspherical surface can be obtained which is limited in diffraction for small image scales.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: February 24, 1987
    Assignee: Optische Werke G. Rodenstock
    Inventor: Ernst Rothe