公开(公告)号：US11156836B2

公开(公告)日：2021-10-26

申请号：US16171212

申请日：2018-10-25

Applicant: Google LLC

Inventor： Douglas R. Dykaar

IPC: G02B27/01 ,  H04N9/31 ,  H01S5/042 ,  H01S5/02208 ,  G02B26/10 ,  H01S5/40 ,  G02B27/09 ,  G02B27/30 ,  H01S5/0237 ,  H01S5/02253 ,  H01S5/02257 ,  H01S5/02325 ,  H01S5/02345 ,  H01S5/42 ,  H01S5/02251 ,  H01S5/02255

Abstract: Systems, devices, and methods for optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. The optical engines include an optical director element that includes a curved reflective surface (e.g., parabolic cylinder) that redirects laser light beams and collimates the same along the fast axes thereof. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.

公开(公告)号：US10942359B2

公开(公告)日：2021-03-09

申请号：US16216932

申请日：2018-12-11

Applicant: GOOGLE LLC

Inventor： Jörg Pierer ,  Rony Jose James ,  Stefan Mohrdiek ,  Douglas R. Dykaar

IPC: G02B6/12 ,  G02B6/124 ,  G02B6/13 ,  G02B6/42 ,  G02B27/14 ,  G02B27/01 ,  G02B27/18 ,  G03B21/20 ,  G03B21/00 ,  G02B27/10 ,  H01S5/022 ,  H01S5/40 ,  H04N9/31 ,  H01S5/02208 ,  H01S5/02224 ,  G03B33/12 ,  C03B33/12 ,  G02B27/42

Abstract: Systems, devices, and methods of manufacturing optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. Photonic integrated circuits having grating couplers thereon may be used to wavelength multiplex beams of light emitted by the plurality of laser diodes into a coaxially superimposed aggregate beam. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.

公开(公告)号：US11668927B2

公开(公告)日：2023-06-06

申请号：US16254912

申请日：2019-01-23

Applicant: GOOGLE LLC

Inventor： Jörg Pierer ,  Rony Jose James ,  Stefan Mohrdiek ,  Douglas R. Dykaar ,  John Domm

IPC: G02B26/10 ,  H01S5/068 ,  G02B27/01 ,  H01S5/00 ,  H01S5/40 ,  H01S5/024 ,  G02B27/10 ,  H01S5/02253 ,  H01S5/02257 ,  H01S5/02325 ,  G02B27/42 ,  G02B27/00 ,  H01S5/0237

CPC classification number: G02B26/101 ,  G02B26/10 ,  G02B27/01 ,  G02B27/0101 ,  G02B27/017 ,  G02B27/0172 ,  G02B27/1086 ,  H01S5/0071 ,  H01S5/02253 ,  H01S5/02257 ,  H01S5/02325 ,  H01S5/02453 ,  H01S5/06804 ,  H01S5/4012 ,  H01S5/4093 ,  G02B27/0093 ,  G02B27/4205 ,  G02B2027/0178 ,  H01S5/005 ,  H01S5/0237

Abstract: Systems, devices, and methods for providing optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. The optical engines of the present disclosure may integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. Wavelength stabilization for the laser diodes is achieved by controlling the temperature of the lasers to always be in a particular range of operating specifications which provides wavelength stabilization that meets particular performance criteria. The lasers themselves may be used for temperature control by selectively switching them on to maintain their temperature within a specified range. Alternatively, compact resistive heaters may be positioned proximate the laser diodes to control the temperature of the laser diodes during operation. WHUDs that employ such optical engines and laser projectors are also described. Additionally, optical systems for collimating and shifting light beams are described.

公开(公告)号：US20220137420A1

公开(公告)日：2022-05-05

申请号：US17579051

申请日：2022-01-19

Applicant: GOOGLE LLC

Inventor： Jörg Pierer ,  Rony Jose James ,  Stefan Mohrdiek ,  Douglas R. Dykaar ,  Martin Joseph Kiik ,  Syed Moez Haque

IPC: G02B27/01 ,  H01S5/02224 ,  H01S5/40 ,  G02B27/42 ,  H01S5/0237 ,  H01S5/02253 ,  H01S5/02255 ,  H01S5/02257

Abstract: Systems, devices, and methods of manufacturing optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.

公开(公告)号：US11009705B2

公开(公告)日：2021-05-18

申请号：US16171223

申请日：2018-10-25

Applicant: GOOGLE LLC

Inventor： Douglas R. Dykaar

IPC: G02B27/01 ,  H04N9/31 ,  H01S5/042 ,  H01S5/02208 ,  G02B26/10 ,  H01S5/40 ,  G02B27/09 ,  G02B27/30 ,  H01S5/0237 ,  H01S5/02253 ,  H01S5/02257 ,  H01S5/02325 ,  H01S5/42 ,  H01S5/02251 ,  H01S5/02255

Abstract: Systems, devices, and methods for optical engines and laser projectors that are well-suited for use in wearable heads-up displays (WHUDs) are described. Generally, the optical engines of the present disclosure integrate a plurality of laser diodes (e.g., 3 laser diodes, 4 laser diodes) within a single, hermetically or partially hermetically sealed, encapsulated package. The optical engines include an optical director element that includes a curved reflective surface (e.g., parabolic cylinder) that redirects laser light beams and collimates the same along the fast axes thereof. Such optical engines may have various advantages over existing designs including, for example, smaller volumes, better manufacturability, faster modulation speed, etc. WHUDs that employ such optical engines and laser projectors are also described.

公开(公告)号：US10971889B2

公开(公告)日：2021-04-06

申请号：US16046438

申请日：2018-07-26

Applicant: GOOGLE LLC

Inventor： Douglas R. Dykaar

IPC: H01S5/00 ,  H01S5/028 ,  G02B27/01 ,  H04N9/31 ,  H01S5/40

Abstract: Systems, devices, and methods for narrow waveband laser diodes are described. The conventional coating on the output facet of a laser diode is replaced with a notch filter coating that is reflective of wavelengths within a narrow waveband around the nominal output wavelength of the laser diode and transmissive of other wavelengths. The notch filter coating ensures the laser diode will lase at the nominal wavelength and not lase for wavelengths outside of the narrow waveband. The notch-filtered laser diode provides a narrow waveband output that is matched to the playback wavelength of at least one hologram in a transparent combiner of a wearable heads-up display, and thereby reduces or eliminates display aberrations that can result from wavelength sensitivity of the playback properties of the hologram.