Shutter for a video tape camera

Details Shutter for a video tape camera Shutter for a video tape camera

1983-12-16

1985-10-15

Griffin, Donald A.

Optics: motion pictures

Shutters

Rotary

G03B 910

Patent

active

045470510

ABSTRACT:
A focal plane shutter for a video camera has a pair of disks rotated in the same direction about a common axis in synchronism with the raster scan blanking interval, at a nominal rotational rate of 3600 rpm. The disks each have a single opening which overlie one another to define a single light admitting shutter aperture positioned to illuminate the video pickup once per revolution. Stop action or slow motion studies are greatly improved by the increase in shutter speed resulting from this single aperture shutter.

REFERENCES:
patent: 1115196 (1914-10-01), Hermand
patent: 1525346 (1925-02-01), Warren
patent: 3490835 (1970-01-01), Nemeth et al.
patent: 3715486 (1973-02-01), Wright et al.
patent: 3787116 (1974-01-01), Shimizu
patent: 4171529 (1979-10-01), Silberberg et al.
patent: 4257693 (1981-03-01), Hirata et al.
patent: 4284332 (1981-08-01), Sekine
patent: 4301476 (1981-11-01), Keller et al.

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