Anamophic optical system

US5890788A · kind A · utility

Assignee

• Raytheon Company · US

Inventors

• Chungte W. Chen · Irvine, US
• Ronald G. Hegg · Los Angeles, US
• Jonathan L. Dugdale · Burleson, US
• John W. Schaefer · Wilmington, US

Key dates

• Filing date: Dec 10, 1997
• Grant date: Apr 6, 1999
• Expiry date: Dec 10, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G09B9/326
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An optical system (10) has an image source (12), a first optical element (34), a second optical element (50), and an aperture stop (52). The first optical element (34) is positioned close to the image source (12) to generate anamophic field curvature of matching the display screen (16). The radiation is then directed to the second optical element (50) which corrects astigmatism of the radiation passing from the first optical element (34). The aperture stop (52) is provided adjacent to the second optical element (50). The system may be used in an infinite display optical system where the radiation would be directed through projector 14 to a screen (16). A mirror (18) is positioned to reflect the radiation from the screen (16) to provide an image to a viewer.