Back to results
US 2011/0032483 A1Published application
Multi-segment optical retarder for creating 3d images
AssigneeJDS Uniphase Corporation
InventorsCurtis R. HRUSKA, David M. SHEMO, Kim Leong TAN
Life of this patent
Estimating the term…
Abstract
A multi-segment optical retarder that can be used with or within a single projector for creating 3D images. The multi-segment optical retarder is coupled to an actuator used to effect some predetermined linear, rotary, or oscillating movement of the multi-segment optical retarder such that a fast axis orientation of each segment is substantially constant relative to itself over time and for a given area of incidence.
Claims22
A projection system comprising:
- an imager for sequentially emitting left-eye and right-eye images;
- an optical retarder having a plurality of segments including a first segment and a second segment, the first segment for converting left-eye images to a first polarization, the second segment for converting right-eye images to a second other polarization;
- and
- an actuator for one of rotating and translating the optical retarder according to timing synchronization of the left-eye and right-eye image emissions such that a polarized beam of light incident on the first segment samples a first fast axis orientation that is substantially constant relative to itself over time as the optical retarder is one of rotated and translated, and such that the polarized beam of light incident on the second segment samples a second other fast axis orientation that is substantially constant relative to itself over time as the optical retarder is one of rotated and translated.
1 more element
An optical wheel retarder comprising:
- a transparent disc having a center and a plurality of sectors, the plurality of sectors including a first sector and a second sector, the first sector including a first waveplate having a predetermined retardance magnitude, the second sector including a second waveplate having the predetermined retardance magnitude, each of the first and second waveplates having a fast axis orientation that varies with azimuthal angle about the center of the disc,
- wherein the predetermined retardance magnitude provides one of quarter-wave and half-wave retardance within a predetermined wavelength range.
A projection system comprising:
- an imager for sequentially emitting left-eye and right-eye images;
- an optical retarder having a plurality of segments, the plurality of segments including a first segment and a second segment, the first and second segments having a substantially same and uniform retardance magnitude, each of the first and second segments having a spatially varying fast axis orientation, the first segment including a first region having a first fast axis azimuth orientation relative to an incident polarization state at a first instant when the first region is in an optical path, the second segment including a second region having a second fast axis azimuth orientation relative to an incident polarization state at a second instant when the second region is in the optical path;
- and
- an actuator for rotating the optical retarder according to timing synchronization of left-eye and right-eye image emissions
- wherein the first fast axis azimuth orientation is one of 90 degrees and 45 degrees relative to the second fast axis azimuth relative orientation.
2 more elements
Dependencies are inferred from the claim text.