Optical aliasing filter, pixel sensor arrangement and digital recording device

US8593562B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Juergen Ernst · Erlangen, DE
• Michael Schoeberl · Erlangen, DE
• Alexander Oberdoerster · Nuremberg, DE

Key dates

• Filing date: Oct 1, 2010
• Grant date: Nov 26, 2013
• Expiry date: Nov 6, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/46
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A refraction at a suitably structured surface for example with an arrangement of the same between image plane and mapping optics is used to realize on the one hand a desired aliasing filtering or spatial low-pass filtering on the image plane wherein on the other hand the manufacturing of such structured surfaces may be realized in a cost-effective way. In addition to that, the plate thickness except for the amplitude of the surface structure and aspects of the stability of the plate is of no importance for handling the same, so that the integration into optical systems is facilitated.