| 摘要 |
<p>IMAGE STABILIZATION SYSTEM FOR CONTINUOUS FILM SCANNING APPARATUS An optical scanner system such as a projector for the continuous transmission of images to provide image immobilization is provided. The optical scanner system includes an illumination system, a scanner mechanism, and a projection lens system. The scanner mechanism is capable of creating virtual images of successive film frames with at least one virtual image point of each film frame positioned on a stationary locus point and at least another virtual image point offset from the stationary image locus point and relatively movable during a scanning movement. The scanner mechanism can, for example, be of a reflective or refractive polygon geometry. The specific parameters of the projection lens system and illumination system recognizes the inherent limitations of the dynamic keystoning aberration in scanner assemblies and seeks to nullify its effect in the projected real image. The projection means is of a telecentric design. The illumination system is matched to the vignetting capabilities of the scanner and projection system to selectively illuminate different regions of a real image of each film frame so that the light transmission is progressively decreased in the region of each film frame when the relative movement of the real offset image point becomes progressively greater. Basically, the system deluminates during the greatest rate of defocusing of the real image.</p> |
