`
`The following listing is the entire set of pending claims pursuant to 37 C.F.R.
`
`§l.121(c)(3)(i), with any mark—ups showing the changes made by the present preliminary
`
`amendment.
`
`1—20. (Cancelled)
`
`21.
`
`(Previously Presented) A polarization conversion system operable to direct time—
`
`sequential left and right stereo images onto an overlapping area of a cinema projection
`
`screen, the system comprising:
`
`a polarization beam splitter (PBS) operable to receive from a projector lens randomly—
`
`polarized, diverging image light bearing the time—sequential left and right stereo images, to
`
`direct first diverging image light having a first state of polarization (SOP) along a first image
`
`light path, and to direct second diverging image light having a second SOP along a second
`
`image light path;
`
`a reflector located on one of the first and second image light paths and positioned to
`
`receive either of the first diverging image light or the second diverging image light, the
`
`reflector positioned so as to direct the received first or second diverging image light toward
`
`the cinema projection screen;
`
`a first polarization switch located on the first image light path, the first polarization
`
`switch operable to receive the first diverging image light from the first image light path, and
`
`to selectively translate the polarization state of the first diverging image light to one of a first
`
`output circular SOP and a second output circular SOP;
`
`
`
`a second polarization switch located on the second image light path, the second
`
`polarization switch operable to receive the second diverging image light from the second
`
`image light path, and to selectively translate the polarization state of the second image light
`
`to one of the first output circular SOP and the second output circular SOP;
`
`wherein the first polarization switch and the second polarization switch are located
`
`such that the first diverging image light received at the first polarization switch does not
`
`overlap with the second diverging image light received at the second polarization switch; and
`
`alignment optics configured such that the time—sequential left and right stereo images
`
`are overlaid on the cinema projection screen.
`
`22.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`alignment optics are configured such that the time—sequential left and right stereo images are
`
`overlaid on the cinema projection screen within four—pixel accuracy.
`
`23.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`polarization conversion system is configured to maintain spots sizes on the cinema projection
`
`screen within a fraction of a pixel.
`
`24.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`polarization conversion system is configured to maintain lateral color within a pixel.
`
`25.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`
`
`polarization conversion system is configured such that the time—sequential left and right
`
`stereo images are overlaid on the cinema projection screen within two—pixel accuracy.
`
`26.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`first polarization switch and the second polarization switch select between the first output
`
`circular SOP and the second output circular SOP in synchronization with transmission of an
`
`image frame by a projector.
`
`27.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector comprises a prism.
`
`28.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector comprises a mirror.
`
`29.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector is located on the second image light path, and wherein the reflector is tiltable so that
`
`the reflector can direct image light on the second image light path.
`
`30.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising a contrast enhancing element located on one of the first and second image light
`
`paths and operable to enhance contrast of the images projected on the cinema projection
`
`SCI‘CCH .
`
`
`
`3 1.
`
`(Previously Presented) The polarization conversion system of claim 30, wherein the
`
`contrast enhancing element comprises a polarization rotator.
`
`32.
`
`(Previously Presented) The polarization conversion system of claim 30, wherein the
`
`contrast enhancing element comprises a half—wave plate.
`
`33.
`
`(Previously Presented) The polarization conversion system of claim 30, wherein the
`
`contrast enhancing element comprises a retarder stack with a plurality of polymer films
`
`having retardance.
`
`34.
`
`(Previously Presented) The polarization conversion system of claim 30, wherein the
`
`contrast enhancing element comprises a polymer film.
`
`35.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector located on one of the first and second image light paths is tilted to overlay the time—
`
`sequential left and right stereo images onto the projection screen.
`
`36.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector is located on the second image light path.
`
`37.
`
`(Previously Presented) The polarization conversion system of claim 36, wherein the
`
`
`
`second polarization switch is located after the reflector.
`
`38.
`
`(Previously Presented) The polarization system of claim 21, wherein the polarization
`
`beam splitter comprises a wire grid polarization beam splitter.
`
`39.
`
`(Previously Presented) The polarization system of claim 21, wherein the polarization
`
`beam splitter comprises a glass polarization beam splitter cube having first and second glass
`
`prisms.
`
`40.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`polarization beam splitter comprises a tilted plate.
`
`41.
`
`(Previously Presented) The polarization conversion system of claim 40, further
`
`comprising a flat plate positioned after the tilted plate polarization beam splitter, the flat plate
`
`being configurable in the system to reduce or correct astigmatism of an image at the
`
`projection screen.
`
`42.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising one or more de—centered optical elements located after the polarization beam
`
`splitter.
`
`43.
`
`(Previously Presented) The polarization conversion system of claim 42, wherein the
`
`
`
`one or more de— centered optical elements reduce astigmatism of an image at the projection
`
`SCI‘CCH .
`
`44.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector has a curved surface.
`
`45.
`
`(Previously Presented) The polarization conversion system of claim 44 wherein the
`
`curved surface provides optical power that compensates for path length difference between
`
`the first and second image light paths.
`
`46.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector has a Fresnel lens or diffractive surface that provides optical power that
`
`compensates for path length difference between the first and second image light paths.
`
`47.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising a refractive element on one of the first and second image light paths.
`
`48.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising one of a lens having positive power on the first image light path and a lens
`
`having negative power on the second image light path.
`
`49. (Previously Presented) The polarization conversion system of claim 21, further
`
`
`
`comprising a lens pair located on one of the first and second image light paths.
`
`50. (Previously Presented) The polarization conversion system of claim 49, wherein the lens
`
`pair is operable to adjust a magnification difference between the first image light and the
`
`second image light.
`
`5 1. (Previously Presented) The polarization conversion system of claim 49 wherein the lens
`
`pair comprises a first lens having positive power and a second lens having negative power.
`
`52. (Previously Presented) The polarization conversion system of claim 49 wherein the lens
`
`pair comprises a doublet lens.
`
`53. (Previously Presented) The polarization conversion system of claim 49 wherein the lens
`
`pair comprises a telephoto lens.
`
`54. (Previously Presented) The polarization conversion system of claim 49 wherein the lens
`
`pair is adjustable by mechanically decentering a lens or element with optical power.
`
`55.
`
`(Previously Presented) The polarization conversion system of claim 47, wherein the
`
`refractive element is located between the polarization beam splitter and one of the first and
`
`second polarization switches.
`
`
`
`56.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`polarization beam splitter comprises a polarizing surface that is oriented at other than a 45
`
`degree orientation from an optical aXis of the diverging image light received from the
`
`projector.
`
`57.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector comprises a reflecting surface that is oriented at other than a 45 degree orientation
`
`from an optical aXis of the one of the first and second image light paths that it receives.
`
`58.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`alignment optics comprise mechanical components operable to tilt either of the polarization
`
`beam splitter or the reflector.
`
`59.
`
`(Previously Presented) The polarization conversion system of claim 58, wherein the
`
`mechanical components are operable to tilt the polarization beam splitter.
`
`60.
`
`(Previously Presented) The polarization conversion system of claim 58, wherein the
`
`mechanical components are operable to tilt the reflector.
`
`61.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`alignment optics comprise a lens or other element with optical power in one of the first and
`
`second image light paths to adjust the overlap of the time—sequential left and right stereo
`
`
`
`images on the projection screen.
`
`62.
`
`(Previously Presented) The polarization conversion system of claim 61, wherein the
`
`lens or other element with optical power comprises a telephoto lens pair.
`
`63.
`
`(Previously Presented) The polarization conversion system of claim 61, wherein the
`
`alignment optics further comprise mechanical components operable to de—center the lens or
`
`other element with optical power.
`
`64.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein at
`
`least one of the polarization beam splitter and the alignment optics include an anti—reflection
`
`coating thereon to minimize stray light reflection.
`
`65.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising:
`
`a means, located on the first image light path, for correcting a magnification of
`
`images produced by the first diverging image light on the first image light path so that the
`
`magnification becomes substantially the same on the cinema projection screen as a projection
`
`of images produced by the second image light on the second image light path.
`
`66.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising:
`
`10
`
`
`
`a means for adjusting locations of images from the first image light and locations
`
`from the second image light so that the locations become substantially the same on the
`
`cinema projection screen.
`
`67.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising:
`
`a means for adjusting one of size of images from the first image light and size of
`
`images from the second image light so that the size of images become substantially the same
`
`on the cinema projection screen.
`
`68.
`
`(Previously Presented) The polarization conversion system of claim 67, wherein the
`
`means for adjusting the locations is achieved by at least one of (i) tilting the polarization
`
`beam splitter and (ii) mechanically de—centering at least one of the polarization beam splitter,
`
`the polarization rotator, and the reflector with optical power.
`
`69.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising a telephoto lens pair located on the first image light path, wherein the telephoto
`
`lens pair is configured to collimate the first diverging image light on at least a portion of the
`
`first image light path.
`
`70.
`
`(Previously Presented) The polarization conversion system of claim 21, further
`
`comprising a telephoto lens pair located on the first image light path, wherein the telephoto
`
`11
`
`
`
`lens pair is configured to converge the first diverging image light on at least a portion of the
`
`first image light path.
`
`71.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein the
`
`reflector has optical power.
`
`72.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein an
`
`optical component of the system is configured to collimate diverged image light passing
`
`therethrough in at least a portion of its path.
`
`73.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein an
`
`optical component of the system is configured to diverge collimated image light passing
`
`therethrough in at least a portion of its path.
`
`74.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein
`
`image light passing between the polarization beam splitter and the cinema projection screen
`
`comprises collimated image light in at least a portion of its path.
`
`75.
`
`(Previously Presented) The polarization conversion system of claim 21, wherein
`
`image light passing through the system comprises collimated image light.
`
`76.
`
`(Previously Presented) A polarization conversion system operable to direct time—
`
`12
`
`
`
`sequential left and right stereo images onto an overlapping area of a cinema projection
`
`screen, the system comprising:
`
`a polarization beam splitter (PBS) operable to receive from a projector lens randomly—
`
`polarized, diverging image light bearing the time—sequential left and right stereo images, to
`
`direct first diverging image light having a first state of polarization (SOP) along a first image
`
`light path, and to direct second diverging image light having a second SOP along a second
`
`image light path;
`
`a reflector located on one of the first and second image light paths and positioned to
`
`receive either of the first diverging image light or the second diverging image light, the
`
`reflector positioned so as to direct the received first or second diverging image light toward
`
`the cinema projection screen;
`
`a first polarization switch located on the first image light path, the first polarization
`
`switch operable to receive the first diverging image light from the first image light path, and
`
`to selectively translate the polarization state of the first diverging image light;
`
`a second polarization switch located on the second image light path, the second
`
`polarization switch operable to receive the second diverging image light from the second
`
`image light path, and to selectively translate the polarization state of the second image light;
`
`and
`
`alignment optics configured such that the time—sequential left and right stereo images
`
`are overlaid on the cinema projection screen.
`
`77.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein the
`
`13
`
`
`
`alignment optics are configured such that the time—sequential left and right stereo images are
`
`overlaid on the cinema projection screen within four—pixel accuracy.
`
`78.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein the
`
`first polarization switch selectively translates the polarization state of the first diverging
`
`image light to one of a first output circular SOP and a second output circular SOP.
`
`79.
`
`(Previously Presented) The polarization conversion system of claim 77, wherein the
`
`second polarization switch selectively translates the polarization state of the second
`
`diverging image light to one of the first output circular SOP and the second output circular
`
`SOP.
`
`80.
`
`(Previously Presented) The polarization conversion system of claim 78, wherein the
`
`first polarization switch and the second polarization switch select between the first output
`
`circular SOP and the second output circular SOP in synchronization with transmission of an
`
`image frame by a projector.
`
`81.
`
`(Previously Presented) The polarization conversion system of claim 76, further
`
`comprising:
`
`a means, located on the second image light path, for correcting a magnification of
`
`images produced by second diverging image light on the second image light path so that the
`
`magnification becomes substantially the same on a projection screen as a magnification of
`
`14
`
`
`
`images produced by the first image light on the first image light path.
`
`82.
`
`(Previously Presented) The polarization conversion system of claim 78, further
`
`comprising:
`
`a means for adjusting locations of images from the first image light and locations
`
`from the second image light so that the locations become substantially the same on the
`
`cinema projection screen.
`
`83.
`
`(Previously Presented) The polarization conversion system of claim 82, wherein the
`
`means for adjusting the locations is achieved by at least one of (i) tilting the reflector and (ii)
`
`mechanically de—centering at least one of the polarization beam splitter, the polarization
`
`rotator, and the reflector with optical power.
`
`84.
`
`(Previously Presented) The polarization conversion system of claim 76, further
`
`comprising a telephoto lens pair located on the first image light path, wherein the telephoto
`
`lens pair is located before the first polarization switch.
`
`85.
`
`(Previously Presented) The polarization conversion system of claim 76, further
`
`comprising a telephoto lens pair located on the first image light path, wherein the telephoto
`
`lens pair is configured to collimate the first diverging image light on the first image light path
`
`in at least a portion of its path.
`
`15
`
`
`
`86.
`
`(Previously Presented) The polarization conversion system of claim 76, further
`
`comprising a telephoto lens pair located on the first image light path, wherein the telephoto
`
`lens pair is configured to converge the first diverging image light on at least a portion of the
`
`first image light path.
`
`87.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein the
`
`reflector has optical power.
`
`88.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein an
`
`optical component of the system is configured to collimate diverged image light passing
`
`therethrough in at least a portion of its path.
`
`89.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein an
`
`optical component of the system is configured to diverge collimated image light passing
`
`therethrough in at least a portion of its path.
`
`90.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein
`
`image light passing between the polarization beam splitter and the cinema projection screen
`
`comprises collimated image light in at least a portion of its path.
`
`91.
`
`(Previously Presented) The polarization conversion system of claim 76, wherein
`
`image light passing through the system comprises collimated image light in at least a portion
`
`16
`
`
`
`of its path.
`
`92.
`
`(Previously Presented) A polarization conversion system operable to direct time—
`
`sequential left and right stereo images onto an overlapping area of a cinema projection
`
`screen, the system comprising:
`
`a beam—splitting means for receiving from a projector lens randomly polarized and
`
`diverging image light bearing the time—sequential left and right stereo images, so as to direct
`
`first diverging image light having a first state of polarization (SOP) along a first image light
`
`path, and to direct second diverging image light having a second SOP along a second image
`
`light path;
`
`a reflecting means, located on one of the first and second image light paths, for
`
`receiving either of the first diverging image light or the second diverging image light and
`
`reflecting the received first or second diverging image light so that the received first or
`
`second diverging image light is directed towards the cinema project screen;
`
`a first switching means, located on the first image light path, for receiving the first
`
`diverging image light from the first image light path so as to selectively translate the
`
`polarization state of the first diverging image light to one of a first output circular SOP and a
`
`second output circular SOP;
`
`a second switching means, located on the second image light path, for receiving the
`
`second diverging image light from the second image light path so as to selectively translate
`
`the polarization state of the second image light to one of the first output circular SOP and the
`
`second output circular SOP;
`
`17
`
`
`
`wherein the first switching means and the second switching means are located such
`
`that the first diverging image light received at the first switching means does not overlap
`
`with the second diverging image light received at the second switching means; and
`
`optic alignment means for aligning the time—sequential left and right stereo images
`
`such that the time—sequential left and right stereo images are overlaid on the cinema
`
`projection screen.
`
`93.
`
`(Previously Presented) The polarization conversion system of claim 92, wherein the
`
`optic alignment means are configured such that the time—sequential left and right stereo
`
`images are overlaid on the cinema projection screen within four—pixel accuracy.
`
`94.
`
`(Previously Presented) The polarization conversion system of claim 92, wherein the
`
`reflecting means has optical power.
`
`95.
`
`(Previously Presented) The polarization conversion system of claim 92, further
`
`comprising a collimating means for collimating diverged image light passing therethrough in
`
`at least a portion of its path.
`
`96.
`
`(Previously Presented) The polarization conversion system of claim 92, further
`
`comprising a converging means for converging diverged image light passing therethrough in
`
`at least a portion of its path.
`
`18
`
`
`
`97.
`
`(Previously Presented) The polarization conversion system of claim 92, further
`
`comprising:
`
`a means, located on the second image light path, for correcting a magnification of
`
`images produced by second diverging image light on the second image light path so that the
`
`magnification becomes substantially the same on the cinema projection screen as a
`
`magnification of images produced by the first image light on the first image light path.
`
`98.
`
`(Previously Presented) The polarization conversion system of claim 92, wherein the
`
`optic alignment means is achieved by at least one of (i) tilting the polarization beam splitter
`
`and (ii) mechanically de—centering at least one of the polarization beam splitter, the
`
`polarization rotator and the reflector with optical power.
`
`19
`
`
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