Abstract: The present invention relates to a display device with variable focusing depth. The display device presents from electrical signals an image built up of at least two sub-images for the eye (7) of an observer. Focusing depth is generated in the image by different sub-images being generated with different focal distances and that objects in the image are distributed in the sub-images with regard to the depth effect one intends to create in the image.

Abstract: A device for screening interfering radiation from a radiation source from reaching a radiation receiver. The device includes a sensing device determining the position and orientation of the radiation receiver relative to the radiation source; a matrix, positioned in front of the radiation receiver, of elements which can adopt a varying transmittance and which cover the solid angle within which it is desirable to screen interfering radiation; and control equipment which calculates in what position relative to the radiation receiver a radiation obstacle is to be placed to be able to screen the radiation source and which controls the elements of the matrix in such a manner that the matrix forms a partial or complete radiation obstacle in the estimated position.