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Linear image sensor
Patent reports 31) ultrasonic imaging device Natl Biomed. Res. Foundation Eur 450 667; 9 October 1991 A three-dimensional ultrasonic scanning system is described. A source sequentially transmits ultrasonic energy towards an object in successive directions in a scanning plane. This is by sequential transformation in successive directions in successive planes, parallel to the first. A detector receives reflected energy from the object and converts it to electrical signals for input to an image processor. The signals are processed to develop reconstructed image data. Forward projections of the object are provided in left and right images and form a stereo pair for composite display of the three-dimensional image by a display unit. The system is suitable for medical ultrasonic scanning applications. Binocular perception and savings in hardware are provided by use of advanced processing/programming techniques.
Image intensifier Philips Gloeilampen N V Eur 450670; 1 February 1991 An image intensifier tube for X-ray beam is described. The evacuated tube has a concave input window, a cylindrical side wall and an output plate. The X-rays pass through the input
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window made of an X-ray transparent material such as aluminium, titanium or 'glassy carbon'. The beam impinges on an input phosphorescent screen sandwiched between an aluminium carrier and a photocathode. The secondary electrons from the photocathode impinge on the output screen which consists of a phosphor layer on top of an integrated detection matrix. The matrix consists of 2000 x 2000 pixel elements, each 0.2 mm by 0.2 mm. A conductive gauze screen limits sideways scattering.
Linear image sensor Seiko Instruments Inc. Eur 480 775; 14 October 1991 A linear image sensor is described which has photo-sensing elements on the semiconductor substrate. Each comprises an impurity diffusion layer having a conductivity type differing from that of Ho substrate. Each impurity diffusion layer has the same shape and size. A layer opaque to radiation on the photo-sensing elements has a number of windows. Each window overlaps with a respective photo-sensing element so that each window exposes the same surface area of impurity diffusion layer to improve photo-response uniformity. The sensor is for use in facsimile apparatus, image scanners, digital copiers etc. for reading text and diagrams. It has improved photo-response uniformity.
Displays
Image intensifier Philips Gloeilampen N V Eur 450670; 1 February 1991 An image intensifier tube for X-ray beam is described. The evacuated tube has a concave input window, a cylindrical side wall and an output plate. The X-rays pass through the input
202
window made of an X-ray transparent material such as aluminium, titanium or 'glassy carbon'. The beam impinges on an input phosphorescent screen sandwiched between an aluminium carrier and a photocathode. The secondary electrons from the photocathode impinge on the output screen which consists of a phosphor layer on top of an integrated detection matrix. The matrix consists of 2000 x 2000 pixel elements, each 0.2 mm by 0.2 mm. A conductive gauze screen limits sideways scattering.
Linear image sensor Seiko Instruments Inc. Eur 480 775; 14 October 1991 A linear image sensor is described which has photo-sensing elements on the semiconductor substrate. Each comprises an impurity diffusion layer having a conductivity type differing from that of Ho substrate. Each impurity diffusion layer has the same shape and size. A layer opaque to radiation on the photo-sensing elements has a number of windows. Each window overlaps with a respective photo-sensing element so that each window exposes the same surface area of impurity diffusion layer to improve photo-response uniformity. The sensor is for use in facsimile apparatus, image scanners, digital copiers etc. for reading text and diagrams. It has improved photo-response uniformity.
Displays