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公开(公告)号：US11635492B2
公开(公告)日：2023-04-25
申请号：US17088495
申请日：2020-11-03
Applicant: Magic Leap, Inc.
Inventor： David Cohen , Assaf Pelman , Robert D. TeKolste , Shlomo Felzenshtein , Giora Yahav
Abstract: A time of flight based depth detection system is disclosed that includes a projector configured to sequentially emit multiple complementary illumination patterns. A sensor of the depth detection system is configured to capture the light from the illumination patterns reflecting off objects within the sensor's field of view. The data captured by the sensor can be used to filter out erroneous readings caused by light reflecting off multiple surfaces prior to returning to the sensor.
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公开(公告)号：US11587245B2
公开(公告)日：2023-02-21
申请号：US16936345
申请日：2020-07-22
Applicant: Magic Leap, Inc.
Inventor： David Cohen , Assaf Pellman , Shai Mazor , Erez Tadmor , Giora Yahav
Abstract: A method for determining a distance to a target object includes transmitting light pulses to illuminate the target object and sensing, in a first region of a light-sensitive pixel array, light provided from an optical feedback device that receives a portion of the transmitted light pulses. The feedback optical device includes a preset reference depth. The method includes calibrating time-of-flight (TOF) depth measurement reference information based on the sensed light in the first region of the pixel array. The method further includes sensing, in a second region of the light-sensitive pixel array, light reflected from the target object from the transmitted light pulses. The distance of the target object is determined based on the sensed reflected light and the calibrated TOF measurement reference information.
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公开(公告)号：US20220237823A1
公开(公告)日：2022-07-28
申请号：US17659145
申请日：2022-04-13
Applicant: Magic Leap, Inc.
Inventor： Daniel Farmer , David Cohen , Bradley Vincent Stuart
Abstract: An eye tracking system can include an eye-tracking camera configured to obtain images of the eye at different exposure times or different frame rates. For example, longer exposure images of the eye taken at a longer exposure time can show iris or pupil features, and shorter exposure, glint images can show peaks of glints reflected from the cornea. The shorter exposure glint images may be taken at a higher frame rate (than the longer exposure images) for accurate gaze prediction. The shorter exposure glint images can be analyzed to provide glint locations to subpixel accuracy. The longer exposure images can be analyzed for pupil center or center of rotation. The eye tracking system can predict future gaze direction, which can be used for foveated rendering by a wearable display system. In some instances, the eye-tracking system may estimate the location of a partially or totally occluded glint.
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公开(公告)号：US11315288B2
公开(公告)日：2022-04-26
申请号：US16878366
申请日：2020-05-19
Applicant: Magic Leap, Inc.
Inventor： Daniel Farmer , David Cohen , Bradley Vincent Stuart
Abstract: An eye tracking system can include an eye-tracking camera configured to obtain images of the eye at different exposure times or different frame rates. For example, longer exposure images of the eye taken at a longer exposure time can show iris or pupil features, and shorter exposure, glint images can show peaks of glints reflected from the cornea. The shorter exposure glint images may be taken at a higher frame rate (than the longer exposure images) for accurate gaze prediction. The shorter exposure glint images can be analyzed to provide glint locations to subpixel accuracy. The longer exposure images can be analyzed for pupil center or center of rotation. The eye tracking system can predict future gaze direction, which can be used for foveated rendering by a wearable display system. In some instances, the eye-tracking system may estimate the location of a partially or totally occluded glint.
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公开(公告)号：US10762651B2
公开(公告)日：2020-09-01
申请号：US15721640
申请日：2017-09-29
Applicant: Magic Leap, Inc.
Inventor： David Cohen , Assaf Pellman , Shai Mazor , Erez Tadmor , Giora Yahav
Abstract: A method for determining a distance to a target object includes transmitting light pulses to illuminate the target object and sensing, in a first region of a light-sensitive pixel array, light provided from an optical feedback device that receives a portion of the transmitted light pulses. The feedback optical device includes a preset reference depth. The method includes calibrating time-of-flight (TOF) depth measurement reference information based on the sensed light in the first region of the pixel array. The method further includes sensing, in a second region of the light-sensitive pixel array, light reflected from the target object from the transmitted light pulses. The distance of the target object is determined based on the sensed reflected light and the calibrated TOF measurement reference information.
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Patent Agency Ranking
公开(公告)号：US20200244857A1
公开(公告)日：2020-07-30
申请号：US16846027
申请日：2020-04-10
Applicant: Magic Leap, Inc.
Inventor： Asaf Pellman , Erez Tadmor , David Cohen , Giora Yahav
IPC: H04N5/238 , H04N13/254 , H04N5/232 , G01S7/481 , G02B27/00 , H04N5/347 , H04N5/343 , H04N5/235 , H04N5/225 , G02B27/14 , G02B27/10 , G02B13/14 , G02B5/20 , G01S17/89 , G01S17/42 , G01S7/4865 , G06T7/521
Abstract: An imaging lens includes one or more lens elements configured to receive and focus light in a first wavelength range reflected off of one or more first objects onto an image plane, and to receive and focus light in a second wavelength range reflected off of one or more second objects onto the image plane. The imaging lens further includes an aperture stop and a filter positioned at the aperture stop. The filter includes a central region and an outer region surrounding the central region. The central region of the filter is characterized by a first transmission band in the first wavelength range and a second transmission band in the second wavelength range. The outer region of the filter is characterized by a third transmission band in the first wavelength range and substantially low transmittance values in the second wavelength range.
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公开(公告)号：US20200241635A1
公开(公告)日：2020-07-30
申请号：US16751076
申请日：2020-01-23
Applicant: Magic Leap, Inc.
Inventor： David Cohen
Abstract: An eye tracking system can include an eye-tracking camera configured to obtain images of the eye at different exposure times or different frame rates. For example, longer exposure images of the eye taken at a longer exposure time can show iris or pupil features, and shorter exposure, glint images can show peaks of glints reflected from the cornea. The shorter exposure glint images may be taken at a higher frame rate (than the longer exposure images) for accurate gaze prediction. The shorter exposure glint images can be analyzed to provide glint locations to subpixel accuracy. The longer exposure images can be analyzed for pupil center or center of rotation. The eye tracking system can predict future gaze direction, which can be used for foveated rendering by a wearable display system.
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公开(公告)号：US10659701B2
公开(公告)日：2020-05-19
申请号：US15803351
申请日：2017-11-03
Applicant: Magic Leap, Inc.
Inventor： Asaf Pellman , Erez Tadmor , David Cohen , Giora Yahav
IPC: H04N7/18 , H04N5/238 , G02B27/00 , G01S7/481 , H04N5/232 , H04N13/254 , G06T7/521 , G01S7/4865 , G01S17/42 , G01S17/89 , G02B5/20 , G02B13/14 , G02B27/10 , G02B27/14 , H04N5/225 , H04N5/235 , H04N5/343 , H04N5/347 , G02B1/11 , G02B27/30 , H04N5/378
Abstract: An imaging lens includes one or more lens elements configured to receive and focus light in a first wavelength range reflected off of one or more first objects onto an image plane, and to receive and focus light in a second wavelength range reflected off of one or more second objects onto the image plane. The imaging lens further includes an aperture stop and a filter positioned at the aperture stop. The filter includes a central region and an outer region surrounding the central region. The central region of the filter is characterized by a first transmission band in the first wavelength range and a second transmission band in the second wavelength range. The outer region of the filter is characterized by a third transmission band in the first wavelength range and substantially low transmittance values in the second wavelength range.
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公开(公告)号：US20240377540A1
公开(公告)日：2024-11-14
申请号：US18772067
申请日：2024-07-12
Applicant: Magic Leap, Inc.
Inventor： David Cohen , Elad Joseph , Eyal Preter , Paul Lacey , Koon Keong Shee , Evyatar Bluzer
IPC: G01S17/894 , G06F3/01 , G06F3/03
Abstract: Techniques are disclosed for operating a time-of-flight (TOF) sensor. The TOF may be operated in a low power mode by repeatedly performing a low power mode sequence, which may include performing a depth frame by emitting light pulses, detecting reflected light pulses, and computing a depth map based on the detected reflected light pulses. Performing the low power mode sequence may also include performing an amplitude frame at least one time by emitting a light pulse, detecting a reflected light pulse, and computing an amplitude map based on the detected reflected light pulse. In response to determining that an activation condition is satisfied, the TOF may be switched to operate in a high accuracy mode by repeatedly performing a high accuracy mode sequence, which may include performing the depth frame multiple times.
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公开(公告)号：US12050727B2
公开(公告)日：2024-07-30
申请号：US18302587
申请日：2023-04-18
Applicant: Magic Leap, Inc.
Inventor： Daniel Farmer , David Cohen , Bradley Vincent Stuart
CPC classification number: G06F3/013 , G06T7/77 , G06T2207/10152 , G06T2207/30201
Abstract: An eye tracking system can include an eye-tracking camera configured to obtain images of the eye at different exposure times or different frame rates. For example, longer exposure images of the eye taken at a longer exposure time can show iris or pupil features, and shorter exposure, glint images can show peaks of glints reflected from the cornea. The shorter exposure glint images may be taken at a higher frame rate (than the longer exposure images) for accurate gaze prediction. The shorter exposure glint images can be analyzed to provide glint locations to subpixel accuracy. The longer exposure images can be analyzed for pupil center or center of rotation. The eye tracking system can predict future gaze direction, which can be used for foveated rendering by a wearable display system. In some instances, the eye-tracking system may estimate the location of a partially or totally occluded glint.
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