公开(公告)号：US20190107729A1

公开(公告)日：2019-04-11

申请号：US16150594

申请日：2018-10-03

Applicant: VOLFONI R&D

Inventor： Stephen PALMER

IPC: G02B27/26 ,  G02B27/22 ,  G02B13/02 ,  G02B27/28 ,  G03B21/28 ,  G03B35/26

CPC classification number: G02B27/26 ,  G02B13/02 ,  G02B27/2264 ,  G02B27/283 ,  G03B21/28 ,  G03B35/26 ,  H04N9/3167 ,  H04N9/317 ,  H04N13/337 ,  H04N13/341 ,  H04N13/363

Abstract: The present invention relates to a time-multiplexed stereoscopic 3d projection system wherein the image-beam from a digital cinema projector is separated by a polarization beam-splitting element into one primary image-beam possessing a first state of polarization and at least one secondary image-beam possessing a second state of polarization. Polarization modulators are provided in order to modulate the polarization state for each of said primary and secondary image-beams thereof and arranged so that all left-eye images possess a first modulated state of polarization and all right-eye images possess a second modulated state of polarization. Additionally, there is provided one uniaxial condensing lens and at least one uniaxial expanding lens in order to minimize the optical path-lengths for each of said primary and secondary image-beams thereof, hence enabling said stereoscopic 3d projection system according to the present invention to operate together with projectors having a shorter throw-ratio as compared to other prior-art technologies.

公开(公告)号：US20200089016A1

公开(公告)日：2020-03-19

申请号：US16574903

申请日：2019-09-18

Applicant: VOLFONI R&D

Inventor： Stephen PALMER

IPC: G02B27/26 ,  G02B27/22 ,  G02B27/28

Abstract: The present invention relates to a time-multiplexed stereoscopic 3d projection system that provides a higher level of on-screen image-brightness and image quality as compared to other prior-art technologies based on a single-beam architecture. The invention is based on the insight that a polarization beam-splitting element can be arranged to split an incident image-beam generated by a projector into one transmitted image-beam and at least one reflected image-beam, wherein each of said transmitted and reflected image-beams possess the same common state of polarization. Furthermore, by utilization of at least one reflecting surface, polarization rotator, polarization modulator, polarization-preserving projection-screen and passive polarized viewing-glasses, a stereoscopic 3d projection system is disclosed that provides for a high level of on-screen image-brightness and image quality.