Method and apparatus for automatically compensating for rotation of images in articulated optical systems

US4427269A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Walter Lang · Oberkochen, DE
• Erich Blaha · Oberkochen, DE
• Roland Schmauder · Oberkochen, DE
• Franz Muchel · Oberkochen, DE

Key dates

• Filing date: Nov 25, 1981
• Grant date: Jan 24, 1984
• Expiry date: Nov 25, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/642
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In articulated optical systems, rotation of the image takes place due to the articulations. The invention eliminates this disadvantage by producing a signal whose polarity is dependent on the direction of rotation in which the image produced in the observation plane (64) is turned with respect to the object. By the signal, a compensation element (72) arranged in the articulated optical system is turned until the signal has disappeared. Two devices are disclosed for producing the signal: 1. At the start of the articulated optical system a mark (16) is introduced by reflection, it being focused at the end of the articulated optical system on a sensor (67). 2. On all articulations there are arranged position transmitters (111,112, etc.) which are connected with a minicomputer (130) which calculates the resultant image rotation and gives off a corresponding signal via a digital analog converter (131).