Optical lens systems with dynamic iris for modulating image frames

A polarization conversion system, comprising:

• a first lens system on an initial light path, the first lens system 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 light splitting element configured to receive the image data stream as randomly polarized image light from the first lens system, the light splitting element further configured to direct light with a first polarization state along a first light path, and further configured to direct light with a second polarization state along a second light path;
• a reflecting element located on the second light path and configured to receive light from the light splitting element;
• a polarization rotator element located on the second light path and configured to receive reflected light from the reflecting element;
• a second lens system configured to receive the image data stream on the first light path from the light splitting element;
• a third lens system configured to receive the image data stream on the second light path from the polarization rotator element;
• and
• a dynamic iris in a light path selected from the group consisting of the initial light path, the first light path, and the second light 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.

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, wherein the relay lens system comprises a relay lens pupil, wherein the projection lens system comprises a projection lens pupil, and wherein the dynamic iris is located near a pupil selected from the group consisting of the relay lens pupil and the projection lens pupil.

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, wherein the first image frame comprises a set of pixels, each pixel having a pixel luminance encoded according to a power-law expression based on code values, and wherein after the modulating, the code values are linearized, scaled inversely by the reduction in light transmission, and the power-law expression is reapplied.

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, wherein the dynamic iris is an electro-mechanical iris.