Arrangement for projecting data onto film

X-ray or gamma ray systems or devices – Auxiliary data acquisition or recording – Patient or exposure data

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Details

378210, H05G 128

Patent

active

045204977

ABSTRACT:
An arrangement for projecting data onto an X-ray film has a housing which is designed to support a film cassette. The housing has a pair of mutually perpendicular slots which are capable of receiving a data carrier card. The slots are so designed that the data-carrying part of the card is exposed when the card is supported in either of the slots. A light source for illuminating the data-carrying part of the card is positioned so as to be on the optical axis of the data-carrying part when the card is accommodated in a first one of the slots but not the second. A partially light-transmissive mirror is mounted between the latter slot and the light source and is inclined at an angle of 45.degree. to both of the slots. The mirror transmits a portion of the light from the light source to one of the slots and reflects the light returning to it from this slot towards the film inverting the image of the data in the process. The mirror further reflects a portion of the light from the light source to the other of the slots and transmits the light returning to it from this slot towards the film without inverting the image of the data. The slot selected for the card is thus determined by the required orientation of the image of the data on the film. A focusing lens is mounted between the mirror and the film. The lens is so arranged relative to the above-mentioned second slot that it is located on the optical axis of the data-carrying part of the card when the latter is inserted in such slot. The position of the light source, as well as the relative positions of the light source and the mirror, make it possible to uniformly and brightly illuminate the data-carrying part of the card in either slot using only a single light source.

REFERENCES:
patent: 3614917 (1971-10-01), Wenthe
patent: 3628864 (1971-12-01), Fessenden
patent: 4127322 (1978-11-01), Jacobson et al.

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