Radiant energy – Means to align or position an object relative to a source or...
Patent
1977-06-08
1979-09-11
Smith, Alfred E.
Radiant energy
Means to align or position an object relative to a source or...
250513, A61B 608
Patent
active
041676750
ABSTRACT:
In the illustrated embodiment, the light source utilized to mark the x-ray beam is a halogen lamp with a small focus, an optical lens system being provided for concentrating the light beam on an operative portion of a light reflective mirror so as to amplify the light intensity of the beam reflected by the mirror and lying within the fully opened pairs of x-ray opaque plates. The mirror is shown disposed at approximately 45.degree. diagonally relative to the collimator longitudinal axis with the axis of the light source and optical system extending approximately perpendicularly to the collimator longitudinal axis. The mirror is located between sets of close-to-focus plates and sets of remote-from-focus plates so as to provide a reflected diverging light beam of frusto-pyramidal configuration conforming with the pyrmidal beam shape for x-ray energy defined by the sets of plates. As the plates are adjusted by a scissors action in respective planes, the transmitted light beam is adjusted so as to conform with the transmitted x-ray beam.
REFERENCES:
patent: 2474422 (1949-06-01), Hollstein
patent: 2667586 (1954-01-01), Oswald
patent: 4060733 (1977-11-01), Franke
Sjostrom Hans
Stodberg Lars
Grigsby T. N.
Siemens Aktiengesellschaft
Smith Alfred E.
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