Phase controlled shuttering system with selectable shuttered and unshuttered modes

A shutter for a video camera comprising:

• a first disc of opaque material having,
• a first series of light passages arranged circumferentially about the center of said first disc, and
• a second series of light passages equal in number to said first series of light passages and arranged circumferentially about the center of said first disc each light passage of said second series being positioned in a predetermined angular relationship with an associated one of said light passages in said first series;
• a second disc of opaque material having,
• a third series of light passages arranged circumferentially about the center of said second disc, and
• synchronizing passage means arranged in a predetermined relationship with respect to said third series of light passages;
• indexing means connected to said first and second discs for selective alignment of predetermined ones of said first and third series of light passages;
• and
• a housing surrounding said first and second discs and having,
• an image aperture aligned with said first and third series of light passages, and
• synchronizing signal generating means in alignment with said second series of light passages and said synchronizing passage means.