H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/32, 350/82
H04N 5/72 (2006.01)
Patent
CA 1133632
ABSTRACT OF THE DISCLOSURE Disclosed is a visibility expander of relatively simple and inexpensive construction for use in reading X-ray photographs. It comprises a TV picture tube and monitor coupled, together via a low pass filter and window amplifier in series as stated. Both the expansion factor and the midpoint of the window amplifier transfer character- istics are continuously variable so that the operator may better detect changes to picture contrasts. It may be used by doctors, X-ray technicians, investigative agencies and others who need a simple and inexpensive device for analyzing X-ray photographs.
312914
Danos Michael
Hewson Donald E.
LandOfFree
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