Optical: systems and elements – Lens – With viewed object or viewed field illumination
Patent
1998-11-20
2000-09-05
Epps, Georgia
Optical: systems and elements
Lens
With viewed object or viewed field illumination
359811, 359819, 359822, 40361, G02B 2702, G02B 702
Patent
active
061151955
ABSTRACT:
A magnifier for imaging film units is provided. A magnifying lens is coupled to a view box which may be a stationary view box or mass film motorized viewer for viewing X-ray images. A positioner is provided for positioning the magnifying lens proximate the particular area of interest of the image. Normally, the magnifier remains coupled to the view box, but may be detached such that the view box can operate as a standard view box. With this arrangement, standard view boxes are retrofitted with the present invention. The positioner is hinged to both adjust the focal distance of the magnifier and position the magnifier away from the view box in an open position which does not obstruct the view of the image. The positioner may be coupled to a longitudinal arm situated on a side of the view box which is manually moved or may be driven by one or more motors at the control of an operator's console. Patient information and positions of the magnifier may be entered via the operator's console and stored in a memory. Using two motors, the positioning of the magnifier may be driven by a pair of cross-bars which are coupled to the magnifier at an intersecting point and moved by the motors. The magnifier may be elongated having a flat surface bearing on the film and an arcuate surface opposite thereto for magnifying the image which is particularly suited for imaging dental X-ray images. The magnifier may be integrated inside the view box such that light directed therethrough is re-directed in an oblique direction, passed through the film unit and magnified thereby. A linearizer which may be a transparent overlay covering the film unit linearizes the magnified image to remove any distortions resulting from the magnification.
REFERENCES:
patent: 4510708 (1985-04-01), Pokrinchak
patent: 4529281 (1985-07-01), DeRoche
patent: 5757560 (1998-05-01), Fisherman
Asperas I. Marc
Epps Georgia
Flow X-Ray Corporation
Kowalski Thomas J.
Seyrafi Saeed
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