Visibility expander

Details Visibility expander Visibility expander

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

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