Location History:
- Boblingen, DE (1981 - 1985)
- Boeblingen, DE (1982 - 1988)
Company Filing History:
Years Active: 1981-1988
Title: Franz J Schedewie: Innovator in Interferometric Measuring Methods
Introduction
Franz J Schedewie is a notable inventor based in Böblingen, Germany. He has made significant contributions to the field of optical measurement techniques, holding a total of 5 patents. His work primarily focuses on advanced methods for measuring surfaces with high precision.
Latest Patents
One of his latest patents involves interferometric measuring methods for surfaces. In this method, a surface to be tested is illuminated with two beams polarized perpendicularly to each other. These beams extend symmetrically to an optical axis and are focused on the surface by a lens. The light scattered at the surface is separated from the directly reflected light by a reflecting diaphragm. Through electro-optical compensation, the scattered light is tested for phase difference, which is a function of the distance of a scattering element from the optical axis. This phase difference is unique within the illuminated spot when a diffraction-limited optical system is utilized.
Another significant patent is the method and apparatus for mutually aligning objects. In this innovation, alignment marks in the form of periodic gratings are scanned by a TV camera. The relative phase difference of the two scanning signals is electronically determined using digital or analog means. A microprocessor computes the fundamental wave of the Fourier spectrum of each scanning signal to derive relative alignment from the phase positions of these waves. The use of gratings with different periods allows for the generation of beats, which serve as a highly sensitive measure of alignment errors.
Career Highlights
Franz J Schedewie is currently employed at the International Business Machines Corporation (IBM). His work at IBM has allowed him to develop and refine his innovative measuring techniques, contributing to advancements in optical technology.
Collaborations
Throughout his career, Franz has collaborated with notable colleagues such as Gunter Makosch and Arno Schmackpfeffer. These collaborations have further enriched his research and development efforts in the field of optical measurements.
Conclusion
Franz J Schedewie is a distinguished inventor whose work in interferometric measuring methods has made a significant impact in the field of optical technology. His innovative approaches continue to influence advancements in precision measurement techniques.