Kees-Jan Delst

Title: Kees-Jan Delst and Optical Security Innovation

Introduction

Kees-Jan Delst is an inventor associated with Fairfax, California, and Viavi Solutions Inc. His work includes an optical security element designed to display different visual effects under incident light.

Latest Patents

The provided information identifies one patent associated with Delst: “Optical Security Element.” The invention describes an element that can be printed on a substrate and contains bifunctional pigment flakes in a binder. Each flake has a first surface with a diffraction-grating relief and a second surface with a smaller modulation. The flakes are arranged so that one region exhibits diffraction colors while another displays an interference color. These contrasting effects can support optical security applications. Delst is credited with 1 patent in the information provided.

Career Highlights

Delst is associated with Viavi Solutions Inc., a company whose work includes optical technologies. The described patent reflects an approach to security features that combines diffraction and interference effects within a printed element.

Collaborations

The provided information names Vladimir P. Raksha as Delst’s coworker. No further details about their collaboration are available in the supplied data.

Conclusion

Kees-Jan Delst’s “Optical Security Element” brings together multiple optical effects in a printed security feature, illustrating his contribution to innovation associated with Viavi Solutions Inc.