High dynamic range, high contrast projection systems

摘要

A dynamic iris is located on the imaging path of an optical lens system that includes a relay lens system and at least one projection lens system. A dynamic iris modulates image frames in an image data stream, resulting in a reduction in light transmission associated with the modulated image frames. A dynamic iris may be configured to change the size of its aperture as fast as or faster than the image frame period of the image data stream, and may be located at or near the pupil of a relay lens system, a projection lens system, or both. A second dynamic iris in the imaging path further modulates the image frames, resulting in a further reduction in light transmission. A dynamic iris may modulate an image frame based on an electronic preview of the image frame or based on metadata associated with the image frame.

主权项

1. An optical lens system having an imaging path, the optical lens system comprising:
a relay lens system in the imaging path, the relay lens configured to receive an image data stream, the image data stream comprising a sequence of image frames, the image data stream having an image frame period; a projection lens system in the imaging path, the projection lens system configured to receive the image data stream from the relay lens system; and a dynamic iris in the imaging path, the dynamic iris comprising an aperture having a size, the dynamic iris configured to change the size of the aperture at a rate at least as fast as the image frame period, the dynamic iris further configured to modulate a first image frame in the image data stream, the modulating resulting in a reduction in light transmission associated with the first image frame.