Diagonal sweep shutter mechanism for video tape camera

Details Diagonal sweep shutter mechanism for video tape camera Diagonal sweep shutter mechanism for video tape camera

1983-12-16

1985-11-05

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358209, 358 55, 352216, H01N 530

Patent

active

045517630

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. The disks have openings which overlie one another and define a light admitting shutter aperture positioned to illuminate the video pickup. Each opening is bounded on first and second sides by lines emanating from a point on the disk which is offset from the disk's axis of rotation preferably by a distance equal to the length of the diagonal of the raster. This enables an even exposure of the video pickup, of equal areas at equal times, no matter where the pickup is positioned relative to the disk's axis of rotation.

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