Johannes M Wittkamper

Title: Johannes M. Wittkamper and the Multilayer Information Disc

Introduction

Johannes M. Wittkamper is an inventor associated with Eindhoven, the Netherlands, and U.S. Philips Corporation. His recorded patent concerns a multilayer information disc designed for laser-based reading.

Latest Patents

Wittkamper’s listed patent is “Multilayer Information Disc.” The invention describes a disc with at least two optical structures, each containing a relief-like information track with alternating higher and lower regions. The tracks are read using laser light reflected from the structures, with information detected through phase differences.

At least one reflection layer partially transmits the reading radiation, allowing light to pass through to read another optical structure. The patent also describes matching the reflection coefficients so that approximately the same amount of light returns from each structure. A dielectric material without light absorption is identified as suitable for the partially transmitting layer. Wittkamper is credited with 1 patent in the supplied information.

Career Highlights

The available information connects Wittkamper’s patent work with U.S. Philips Corporation. The multilayer disc invention addresses the technical challenge of reading information from multiple reflective layers within a single optical disc.

Collaborations

Peter L. Holster is identified as Wittkamper’s coworker. The supplied information does not specify whether Holster was a co-inventor or describe the nature of their collaboration.

Conclusion

Johannes M. Wittkamper’s recorded invention focuses on multilayer optical-disc technology, using partially transmitting reflection layers to enable laser reading of multiple information tracks.