公开(公告)号：US11733565B2

公开(公告)日：2023-08-22

申请号：US17297811

申请日：2019-12-07

Applicant: Snap Inc.

Inventor： Nicholas William Melena ,  Terry James Scheffer

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1362

CPC classification number: G02F1/133638 ,  G02F1/13363 ,  G02F1/133531 ,  G02F1/136277 ,  G02F2413/05

Abstract: A system includes a spatial light modulator comprising a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The spatial light modulator is characterized by a first retardation and a first phase retardation and has a first slow axis for light propagation. A voltage source is configured to apply a drive voltage to the spatial light modulator and the first retardation of the spatial light modulator is a function of the drive voltage. A retarder is positioned external to the spatial light modulator and is characterized by a second retardation and a second phase retardation. The retarder includes a second slow axis for light propagation. The second retardation has a value such that all illumination wavelengths in a set of illumination wavelengths are above or below a phase retardation value of 0.25. The set of illumination wavelengths includes at least one illumination wavelength in each of at least three different color spectrums.

公开(公告)号：US11782315B2

公开(公告)日：2023-10-10

申请号：US17297811

申请日：2019-12-07

Applicant: Snap Inc.

Inventor： Nicholas William Melena ,  Terry James Scheffer

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1362

CPC classification number: G02F1/133638 ,  G02F1/13363 ,  G02F1/133531 ,  G02F1/136277 ,  G02F2413/05

Abstract: A system includes a spatial light modulator comprising a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The spatial light modulator is characterized by a first retardation and a first phase retardation and has a first slow axis for light propagation. A voltage source is configured to apply a drive voltage to the spatial light modulator and the first retardation of the spatial light modulator is a function of the drive voltage. A retarder is positioned external to the spatial light modulator and is characterized by a second retardation and a second phase retardation. The retarder includes a second slow axis for light propagation. The second retardation has a value such that all illumination wavelengths in a set of illumination wavelengths are above or below a phase retardation value of 0.25. The set of illumination wavelengths includes at least one illumination wavelength in each of at least three different color spectrums.

公开(公告)号：US20230350247A1

公开(公告)日：2023-11-02

申请号：US18347351

申请日：2023-07-05

Applicant: Snap Inc.

Inventor： Nicholas William Melena ,  Terry James Scheffer

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1362

CPC classification number: G02F1/133638 ,  G02F1/133531 ,  G02F1/136277 ,  G02F1/13363 ,  G02F2413/05

Abstract: A system includes a spatial light modulator comprising a first substrate, a second. substrate, and a liquid crystal layer between the first substrate and the second substrate. The spatial light modulator is characterized by a first retardation and a first phase retardation and has a first slow axis for light propagation. A voltage source is configured to apply a drive voltage to the spatial light modulator is a function of the drive voltage. A retarder is positioned external to the spatial light modulator and is characterized by a second retardation and a second phase retardation. The retarder includes a second slow axis for light propagation. The second retardation has a value such that all illumination wavelengths in a set of illumination wavelengths are above or below a phase retardation value of 0.25. The set of illumination wavelengths includes at least one illumination wavelength in each of at least three different color spectrums.