The disclosed system includes a flying-spot scanner tube selectively operative with frame frequencies of 50 and 60 hertz, and a capstan for driving a record film at the synchronous speed of an associated synchronous motor selectively supplied with 50 and 60 hertz power. Only those record films having 50 frames recorded with video information per second are provided on the leader with an aluminum piece. Upon reproducing one of these films the aluminum piece contacts a guide roller which causes th...

A star scanner on a spin stabilized spacecraft includes a reticle with a pair of slits having different separations as a function of the spacecraft vertical plane, to form a "V" slit. The time between a star image crossing one of the slits relative to a reference telemetry time provides an indication of azimuth angle. The time between the image crossing the two slits provides an indication of elevation angle of the star. If a star cluster is detected such that two stars pass the slits in less ti...

A temperature scanner for use in a hot strip rolling mill to enable ready determination and analysis of the temperature distribution over a hot strip of material passing through the mill. The temperature scanner comprises a photocell scanner unit 1, situated over and scanning a strip 2 perpendicular to its direction of travel, electronic analyzer 6 connected to the scanner unit via lead 5 and displayer 7 connected to the analyzer 6 by lead 8. The analyzer 6 compares the temperatures detected wit...

A method and apparatus for computed axial tomography (CAT) image reconstruction applicable to X-ray scanning of the human body. Successive series of calculations determine the values of a characteristic in defined segmented areas of an examination plane. A reduction in the time and equipment requirements for reconstruction calculations may thereby be effected. Images representative of the difference between the value of the characteristic at a reconstruction point and the average value of the ch...

In a mechanical sector scanner, a first bevel gear is mounted on the end of an output shaft of a motor, and an ultrasonic transducer is rotatably supported for rotating about a scanning axis transverse to the output shaft. A second bevel gear engaging the first bevel gear is mounted on the back surface of the transducer. The output shaft oscillates about an output axis. Oscillations of the output shaft are coupled to the transducer by the bevel gears. The second gear has a plurality of teeth arr...

A lead screw is provided to move two or more document scanning elements at separate and differing rates of speed. In a preferred embodiment the lead screw consists of two threaded segments, each segment having a length and pitch which provides a 2:1 ratio of travel to a scan element threadingly engaged therein.

A method and apparatus for examining relative movement of two masses of different radiation attenuation characteristics, separated by a boundary and moving relative to one another over a repetitive motion cycle. The masses are examined from a plurality of successive angles about a common center of rotation. The object is scanned over each motion cycle from each of these angles to derive a plurality of attenuation coefficients encompassing the entire motion cycle. A plurality of differential poin...

The rotation of a motor is converted into a swinging movement of an ultrasonic transducer by a conversion mechanism. The relationship between a rotation angle .theta. of the motor and a swinging angle .eta. of the ultrasonic transducer can be expressed by .eta.=tan.sup.-1 (sin.theta.). The rotation of the motor is detected by a rotation detector of a reluctance type having an eccentric rotor. A signal having a nonlinear relationship with respect to an actual rotation angle .theta. of the motor, ...

A heat-sterilizable ultrasonic surgical scanner includes an ultrasonic transducer and a permanent magnet motor for moving the transducer along an arcuate path. The scanner further includes a housing for the ultrasonic transducer and the motor. The housing includes an acoustically transparent window for transmitting ultrasonic energy from and into the housing. A resilient diaphragm permits expansion and contraction of a coupling fluid with which the housing is filled without causing fluid loss fr...

A hologram scanner includes a rotatable hologram disk on which a plurality of hologram lenses are arranged circumferentially, and a light beam guide mechanism for successively shifting irradiation regions in a predetermined direction with respect to the direction of rotation of the hologram disk, to apply a light beam successively to the hologram lenses on the hologram disk, so that the scanning of a reading window with the light beam is effected in all directions with high density. The hologram...