Device for forming layer images of a three-dimensional object by means of a lens matrix

US4383733A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Hermann Weiss · Hamburg, DE
• Erhard Klotz · Halstenbek, DE
• Ulf Tiemens · Pinneberg, DE
• Rolf Linde · Haseldorf, DE
• Wilfried Mauser · Bad Schwartau, DE

Key dates

• Filing date: Oct 14, 1980
• Grant date: May 17, 1983
• Expiry date: Oct 14, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H1/06
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

For the formation of layer images of a three-dimensional object, the object is irradiated from a large number of radiation source positions which are situated in one plane. Thus, a coded image of the object, consisting of individual perspective images, is formed. Subsequently, the coded image is illuminated and the perspective images thereof are superposed for the reconstruction of the object by means of a lens matrix which extends parallel to the plane of the coded image and whose flat lens distribution corresponds to the distribution of the radiation source positions. In the superposition zone of the perspective images, a photosensitive element is introduced in order to form individual layer images of the object. For the formation of the different layer images on the photosensitive element, the lens matrix is displaced in the direction of the optical axis, and the photosensitive element is positioned each time within the depth of focus range of the lenses of the lens matrix.