Shutter, in particular for an objective, and a CCD-camera

US6606125B1 · kind B1 · utility

Assignee

• Henke-Sass, Wolf GmbH · DE

Inventors

• Dieter Schulz · Dunrobin, CA
• Norbert Haeckl · Meßkirch, DE

Key dates

• Filing date: Jun 10, 1999
• Grant date: Aug 12, 2003
• Expiry date: Jun 10, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B9/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A shutter for use as an objective for improving the depth of focus in a camera is disclosed. The shutter has, in a central area, a radially uniform transmission function averaged over the circumferential angle. The radial transmission function first drops off toward zero in a radial transition area which is a continuation of the central area and which has a quantity n of cutouts which extend toward the radial outside and are spaced apart from one another at equal angles 360°/n in the circumferential direction. The quantity n of cutouts has the value 5, 6 or 7.