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

Details Device for forming layer images of a three-dimensional object by Device for forming layer images of a three-dimensional object by

1980-10-14

1983-05-17

Henry, Jon W.

X-ray or gamma ray systems or devices

Photographic detector support

Dental

350 63, 378 41, G02B 2722, G03B 3506

Patent

active

043837336

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.

REFERENCES:
patent: 3746872 (1973-07-01), Ashe et al.

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