X-ray photography device

Details X-ray photography device X-ray photography device

1979-03-12

1981-01-20

Smith, Alfred E.

Radiant energy

Means to align or position an object relative to a source or...

250511, 354165, G01N 2100, G01N 2300

Patent

active

042464862

ABSTRACT:
A focus alignment system for X-ray photography devices is provided for use with such devices where the film holder is independent of the X-ray source. The X-ray source has associated therewith two light beam projectors. The beam of one light projector is aligned with the X-ray beam while the beam of the other projector is at an angle thereto. The X-ray beam focus to film distance is correctly set when the light beams intersect on the surface of the film holder. Markings on the film holder indicate central positioning of the X-ray beam when the one light beam is aligned with the markings.

REFERENCES:
patent: 1976179 (1934-10-01), Mannl
patent: 2659824 (1953-11-01), Burnham
patent: 4092544 (1978-05-01), Grim

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