Diaphragm arrangement for X-ray spot-film device

Details Diaphragm arrangement for X-ray spot-film device Diaphragm arrangement for X-ray spot-film device

1983-03-03

1986-03-18

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Collimator

378152, 378176, G21K 102, G21K 104

Patent

active

045773416

ABSTRACT:
The invention relates to diaphragm means arranged close to the film in an X-ray spot film device. The diaphragm means comprises a first diaphragm with several rectangular aperture sections. The sections are displaced in the horizontal direction and have different vertical dimensions. A second diaphragm assembly has vertically extending diaphragm edges. By moving the first diaphragm to different positions in the radiation path, the aperture can be adapted to exposure formats of different vertical dimensions.

REFERENCES:
patent: 3875411 (1975-04-01), Kunert
patent: 3975642 (1976-08-01), Kunert
patent: 4058817 (1977-11-01), Johnson
patent: 4221971 (1980-09-01), Burger
patent: 4335945 (1982-06-01), Johnson
patent: 4352987 (1982-10-01), Hayashi
patent: 4380819 (1983-04-01), Everett
patent: 4490835 (1984-12-01), Wons

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