Format recognition device for a film cassette

Details Format recognition device for a film cassette Format recognition device for a film cassette

1996-01-03

1996-10-29

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

25055924, 25055936, 378167, G01J 142

Patent

active

055699090

ABSTRACT:
In a device for recognizing the format of a film cassette for use in a film cassette holder, such as in an x-ray examination apparatus, a radiation receiver is disposed at a location at which radiation incident on the receiver is altered by a corner of the film cassette when the film cassette is inserted. The radiation receiver generates an output signal dependent on the radiation incident thereon, which is supplied to a processor which identifies the format of the film cassette whose corner caused the alteration in the incident radiation. Dependent on the format configuration, the alteration in the radiation may either be an occlusion of the radiation, or a signal indicating an absence of occlusion. The radiation may simply be ambient light, or may be radiation transmitted by a radiation transmitter allocated to the radiation receiver.

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patent: 5410157 (1995-04-01), Davis
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