公开(公告)号：US11921306B2

公开(公告)日：2024-03-05

申请号：US17805443

申请日：2022-06-03

申请人： II-VI Delaware, Inc.

发明人： Thomas W. Mossberg ,  Jianji Yang ,  Dmitri Iazikov ,  Christoph M. Greiner

IPC分类号： G02B5/18 ,  G02B27/48

CPC分类号： G02B5/1819 ,  G02B5/1847 ,  G02B27/48 ,  G02B2005/1804

摘要： An incident optical beam illuminates a subset of contiguous array of diffraction gratings on a substrate and produces one or more diffracted output beams. The grating array can be arranged so that (i) multiple incident beams result in a contiguous composite solid angle of far-field illumination, (ii) multiple output beams arising from any one incident beam do not overlap in the far field, or (iii) both. The gratings of the array can be arranged to produce a desired far-field illumination intensity profile. The grating array can be arranged so as to suppress or eliminate laser speckle arising from the output beams.

公开(公告)号：US11500135B2

公开(公告)日：2022-11-15

申请号：US17652362

申请日：2022-02-24

申请人： II-VI Delaware, Inc.

发明人： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov ,  Justin M. Hannigan

IPC分类号： G02B5/02 ,  G02F1/1335 ,  F21K9/69 ,  H01L33/60 ,  F21K9/68 ,  F21Y115/10

摘要： Incident optical signals propagate within a diffuser substrate and impinge upon an optical diffuser within the diffuser substrate or on its output surface. The optical diffuser redirects or transforms respective portions of each incident signal into corresponding forward- and backward-directed optical signals. The backward-directed signals are redirected or transformed into additional incident signals, and so on. The forward-directed optical signals collectively form the optical output of an illumination source that exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to an input surface of the diffuser substrate.

公开(公告)号：US12055738B2

公开(公告)日：2024-08-06

申请号：US17934710

申请日：2022-09-23

申请人： II-VI Delaware, Inc.

发明人： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov

IPC分类号： G02B5/18

CPC分类号： G02B5/1861 ,  G02B5/1871

摘要： An optical element includes a substrate, an intermediate layer, a topmost layer, and a contiguous multitude of recessed and non-recessed areal regions. The intermediate layer is formed over a top surface of the substrate and has a refractive index nI. The topmost layer is formed directly on the intermediate layer and has a refractive index nT where nT≠nI. The intermediate and topmost layers are substantially transparent over an operational wavelength range that includes a design wavelength λ0. A subset of areal regions has a largest transverse dimension less than about λ0. Each non-recessed areal region includes corresponding portions of the intermediate and topmost layers. Each recessed areal region extends entirely through the topmost layer and at least partly through the intermediate layer. A fill medium fills the recessed areal regions. The areal regions are variously sized and distributed transversely across the optical element.

公开(公告)号：US20220291427A1

公开(公告)日：2022-09-15

申请号：US17652362

申请日：2022-02-24

申请人： II-VI Delaware, Inc.

发明人： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov ,  Justin M. Hannigan

IPC分类号： G02B5/02 ,  G02F1/1335 ,  F21K9/69 ,  H01L33/60 ,  F21K9/68

摘要： Incident optical signals propagate within a diffuser substrate and impinge upon an optical diffuser within the diffuser substrate or on its output surface. The optical diffuser redirects or transforms respective portions of each incident signal into corresponding forward- and backward-directed optical signals. The backward-directed signals are redirected or transformed into additional incident signals, and so on. The forward-directed optical signals collectively form the optical output of an illumination source that exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to an input surface of the diffuser substrate.