Mask for viewing reduced-size radiographic film, particularly ma

Details Mask for viewing reduced-size radiographic film, particularly ma Mask for viewing reduced-size radiographic film, particularly ma

1995-12-27

1998-10-06

Dzierzynski, Paul M.

Optical: systems and elements

Light control by opaque element or medium movable in or...

359601, 359893, 359894, 40361, G02B 2602, G02B 2702

Patent

active

058186247

ABSTRACT:
A radiographic film mask includes a planar sheet sized for receipt on an illuminated radiographic film examination box. The mask has two opaque sections and a transparent section. The transparent section is disposed on the sheet between the two opaque sections to form a radiographic film viewing area which has an area less than the entire area of the sheet. The sheet may include semi-transparent sections which border the viewing area and interconnect the opaque portions to provide reduced transmission of light along the marginal edges of the radiographic film.

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