Obturator with mobile disc
Obturating with mobile disc blade or obturator.
Used in cinematographic Projection
It is located between the source of light (burner xenon) and projection fenestrates it.
It has a double role:
-
to hide the descent of film in the corridor of projection
- to avoid the effect of flutter (any image being projected twice; 24 images a second and 48 projections)
One in addition distinguishes different type of obturator: with a blade (monopale) two-bladed, trunk-conical, etc Its shutter speed is synchronized with the block of Maltese cross (system allowing to pass from a continuous motion to an intermittent circular motion, at a rate of twenty-four images a second) When one observes a phenomenon of white drawn to the top or bottom of the image it is that the obturator and the block of Maltese cross are desynchronized, it is a spinning.
| Random links: | Low wall-the-castle | Strongylida | Casola Valsenio | Sidestepper | Blizonje | Hermann_Oppenheim |