Image intensifiers having means to reduce electromagnetic interf

Details Image intensifiers having means to reduce electromagnetic interf Image intensifiers having means to reduce electromagnetic interf

1991-02-27

1993-01-12

Razavi, Michael

Facsimile and static presentation processing

Facsimile

Recording apparatus

358217, 358211, H04N 5235, H04N 330

Patent

active

051794454

ABSTRACT:
The high voltage power supply of an image intensifier is operated intermittently to minimize the effect on a resulting intensified image of interference produced by the power supply, the input capacitance of the intensifier maintaining the high voltage at an acceptable level when the power supply is not operating. When used in conjunction with a video camera, the power supply may be allowed to operate only during the frame synch and/or line synch periods. A shutter may inhibit operation of the image intensifier while its power supply is operating.

REFERENCES:
patent: 3553363 (1968-12-01), Anderson
patent: 3864595 (1975-02-01), Lawrence et al.
patent: 4025955 (1977-05-01), Grallien et al.
patent: 4771333 (1988-09-01), Michaels
patent: 4839569 (1989-06-01), Dallin, II
patent: 4872057 (1989-10-01), Woolfolk
patent: 4882481 (1989-11-01), Gilligan et al.
patent: 4935817 (1990-06-01), Gilligan
patent: 5040070 (1991-08-01), Higashitsutsumi et al.

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