Arrangement for projecting an image onto a projection surface and associated transformation lens system

US7347567B2 · kind B2 · utility

Assignee

• JENOPTIK LDT GmbH · DE

Inventors

• Christhard Deter · Hermsdorf, DE
• Jorg Wunderlich · Hermsdorf, DE

Key dates

• Filing date: Oct 21, 2003
• Grant date: Mar 25, 2008
• Expiry date: Sep 4, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/0031
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to an arrangement for projecting an image, which is made of pixels, onto a projection surface, including at least one light source whose intensity can be altered and which emits a light beam, also including a deflection device which deflects the light beam onto the projection surface, and a two-stage transformation lens system which is arranged between the deflection device and the projection surface. The invention also relates to optical systems for adjusting the angle of an incident light beam by means of a two-stage transformation lens. The invention includes a transformation lens system is made up of two partial systems having positive refractive power such that when seen in the direction of the propagation of the light, the entrance pupil is arranged in front of the first lens apex of the transformation lens system and the exit pupil of the transformation lens system is arranged between the lens apex of the last lens and the projection surface, and a diaphragm is arranged inside the exit pupil.