公开(公告)号：US11480808B2

公开(公告)日：2022-10-25

申请号：US17067447

申请日：2020-10-09

Applicant: Apple Inc.

Inventor： Refael Della Pergola ,  Chandra Kakani ,  Roei Remez ,  Yuval Tsur

IPC: G01B11/25 ,  G02B5/18 ,  G02B27/28 ,  G02B5/04 ,  G02B3/00 ,  G02B27/00

Abstract: A compact folded projection system is described that includes a laser light source, a folded lens system comprising a lens stack including two or more refractive lenses and a light folding element (e.g., a prism), and a diffractive beam splitter that includes at least one diffractive surface. The light folding element provides a “folded” optical axis for the lens system to reduce the Z-height of the projection system, for example to within a range of 1.7 to 4 millimeters (e.g., 2 millimeters in some implementations). The laser light source emits light that is refracted by the lens stack to the folding element. The folding element redirects the light to the beam splitter which replicates the light into N×M duplications or tiles to thus generate a larger field of view (FOV) than the internal FOV of the lens system.

公开(公告)号：US20210026153A1

公开(公告)日：2021-01-28

申请号：US17067447

申请日：2020-10-09

Applicant: Apple Inc.

Inventor： Refael Della Pergola ,  Chandra Kakani ,  Roei Remez ,  Yuval Tsur

IPC: G02B27/28 ,  G02B5/04 ,  G02B3/00 ,  G02B27/00 ,  G02B5/18

Abstract: A compact folded projection system is described that includes a laser light source, a folded lens system comprising a lens stack including two or more refractive lenses and a light folding element (e.g., a prism), and a diffractive beam splitter that includes at least one diffractive surface. The light folding element provides a “folded” optical axis for the lens system to reduce the Z-height of the projection system, for example to within a range of 1.7 to 4 millimeters (e.g., 2 millimeters in some implementations). The laser light source emits light that is refracted by the lens stack to the folding element. The folding element redirects the light to the beam splitter which replicates the light into NxM duplications or tiles to thus generate a larger field of view (FOV) than the internal FOV of the lens system.

公开(公告)号：US10802291B1

公开(公告)日：2020-10-13

申请号：US16360258

申请日：2019-03-21

Applicant: Apple Inc.

Inventor： Refael Della Pergola ,  Chandra Kakani ,  Roei Remez ,  Yuval Tsur

IPC: G03B21/14 ,  G02B5/18 ,  G02B27/28 ,  G02B5/04 ,  G02B3/00 ,  G02B27/00

Abstract: A compact folded projection system is described that includes a laser light source, a folded lens system comprising a lens stack including two or more refractive lenses and a light folding element (e.g., a prism), and a diffractive beam splitter that includes at least one diffractive surface. The light folding element provides a “folded” optical axis for the lens system to reduce the Z-height of the projection system, for example to within a range of 1.7 to 4 millimeters (e.g., 2 millimeters in some implementations). The laser light source emits light that is refracted by the lens stack to the folding element. The folding element redirects the light to the beam splitter which replicates the light into N×M duplications or tiles to thus generate a larger field of view (FOV) than the internal FOV of the lens system.