公开(公告)号：US11035989B2

公开(公告)日：2021-06-15

申请号：US15776386

申请日：2016-11-03

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork ,  John Eric Linstadt

IPC: G02B5/18 ,  H04N5/225 ,  G02B13/14 ,  G03H1/04

Abstract: An imaging system includes a phase grating overlying a two-dimensional array of pixels, which may be thermally sensitive pixels for use in infrared imaging. The phase grating comprises a two-dimensional array of identical subgratings that define a system of Cartesian coordinates. The subgrating and pixel arrays are sized and oriented such that the pixels are evenly distributed with respect to the row and column intersections of the subgratings. The location of each pixel thus maps to a unique location beneath a virtual archetypical subgrating. Portions of the phase grating extend beyond the edges of the pixels array to interference pattern in support of Fourier-domain imaging.

公开(公告)号：US10653313B2

公开(公告)日：2020-05-19

申请号：US16233950

申请日：2018-12-27

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork

IPC: A61B3/14 ,  A61B3/02 ,  A61B3/113 ,  A61B3/15 ,  G02B5/18 ,  G02B27/42 ,  G06T3/40 ,  H04N5/33 ,  G06K9/00 ,  H04N5/225 ,  H04N7/18 ,  H04N5/213 ,  H04N5/232 ,  H04N9/04 ,  H04N9/097

Abstract: A sensing device with an odd-symmetry grating projects near-field spatial modulations onto an array of closely spaced pixels. Due to physical properties of the grating, the spatial modulations are in focus for a range of wavelengths and spacings. The spatial modulations are captured by the array, and photographs and other image information can be extracted from the resultant data. Pixels responsive to infrared light can be used to make thermal imaging devices and other types of thermal sensors. Some sensors are well adapted for tracking eye movements, and others for imaging barcodes and like binary images. In the latter case, the known binary property of the expected images can be used to simplify the process of extracting image data.

公开(公告)号：US10404908B2

公开(公告)日：2019-09-03

申请号：US15739868

申请日：2016-06-15

Applicant: Rambus Inc.

Inventor： David G. Stork ,  Patrick R. Gill ,  Evan L. Erickson ,  Mark D. Kellam ,  Alexander C. Schneider ,  Jay Endsley ,  Salman Kabir

IPC: G02B5/18 ,  H04N5/232 ,  H01L27/146 ,  G02B27/42 ,  G02B3/00 ,  G06K9/00 ,  G06K9/62

Abstract: An imaging system includes multiple diffractive optical gratings disposed over a two-dimensional array of photosensitive pixels. The different gratings present different patterns and features that are tailored to produce point-spread responses that emphasize different properties of an imaged scene. The different responses are captured by the pixels, and data captured from the responses can be used separately or together to analyze aspects of the scene. The imaging systems can include circuitry to analyze the image data, and to support modes that select between point-spread responses, selections of the pixels, and algorithms for analyzing image data.

公开(公告)号：US10176562B2

公开(公告)日：2019-01-08

申请号：US15119701

申请日：2015-02-19

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork ,  Patrick R. Johnstone

IPC: G06K9/46 ,  G06T5/10 ,  G02B5/18 ,  G02B27/42 ,  G02B27/46 ,  G06T7/20

Abstract: An optical method of measuring motion employs a phase grating that produces a diffraction pattern responsive to light from an imaged scene. First and second images of the diffraction pattern are captured and compared to produce an image comparison. Apparent motion is then calculated from the image comparison.

公开(公告)号：US20180275323A1

公开(公告)日：2018-09-27

申请号：US15922026

申请日：2018-03-15

Applicant: Rambus Inc.

Inventor： Alexander C. Schneider ,  Patrick R. Gill

IPC: G02B5/18 ,  G02F1/01 ,  H04N5/345 ,  G06T7/11

CPC classification number: G02B5/1842 ,  G02F1/01 ,  G06T7/11 ,  G06T2207/20164 ,  H04N5/345

Abstract: An optical smart sensor combines a phase grating with a rolling shutting to distinguish between modulated point sources. Employing a phase grating in lieu of a lens dramatically reduces size and cost, while using timing information inherent to imaging techniques that used a rolling shutter allows the smart sensor to distinguish point sources quickly and easily using a single frame of image data.

公开(公告)号：US20180091705A1

公开(公告)日：2018-03-29

申请号：US15714483

申请日：2017-09-25

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  Thomas Vogelsang

IPC: H04N5/217

CPC classification number: H04N5/2173 ,  G02B5/1842 ,  G02B27/0056 ,  G02B27/0068 ,  G02B27/4205

Abstract: An imaging system with a diffractive optic captures an interference pattern responsive to light from an imaged scene to represent the scene in a spatial-frequency domain. The sampled frequency-domain image data has properties that are determined by the point-spread function of diffractive optic and characteristics of scene. An integrated processor can modified the sampled frequency-domain image data responsive to such properties before transforming the modified frequently-domain image data into the pixel domain.

公开(公告)号：US20170112376A1

公开(公告)日：2017-04-27

申请号：US15314404

申请日：2015-06-09

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork

IPC: A61B3/113 ,  G02B5/18 ,  A61B3/14 ,  G06T3/40 ,  H04N5/33 ,  H04N7/18 ,  H04N5/225 ,  G02B27/42 ,  G06K9/00

CPC classification number: H04N5/33 ,  A61B3/113 ,  A61B3/14 ,  A61B3/145 ,  A61B3/152 ,  G02B5/1871 ,  G02B5/1876 ,  G02B27/4205 ,  G06K9/00604 ,  G06T3/4053 ,  H04N5/213 ,  H04N5/2253 ,  H04N5/2256 ,  H04N5/23241 ,  H04N5/23245 ,  H04N5/332 ,  H04N7/181 ,  H04N9/045 ,  H04N9/097 ,  H04N2209/048

Abstract: A sensing device with an odd-symmetry grating projects near-field spatial modulations onto an array of closely spaced pixels. Due to physical properties of the grating, the spatial modulations are in focus for a range of wavelengths and spacings. The spatial modulations are captured by the array, and photographs and other image information can be extracted from the resultant data. Pixels responsive to infrared light can be used to make thermal imaging devices and other types of thermal sensors. Some sensors are well adapted for tracking eye movements, and others for imaging barcodes and like binary images. In the latter case, the known binary property of the expected images can be used to simplify the process of extracting image data.

公开(公告)号：US20170084046A1

公开(公告)日：2017-03-23

申请号：US15119701

申请日：2015-02-19

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork ,  Patrick R. Johnstone

IPC: G06T7/20 ,  G02B27/42 ,  G02B27/46 ,  G06T5/10

CPC classification number: G06T5/10 ,  G02B5/18 ,  G02B27/42 ,  G02B27/4205 ,  G02B27/46 ,  G06T7/246 ,  G06T2207/10004

Abstract: Computational diffractive imagers employ special optical phase gratings integrated with photodetector matrices. Such imagers do not require a lens, and so can be extremely small and inexpensive. Captured interference patterns are unintelligible to a human observer, but the captured data includes sufficient information to allow the image or aspects of the image to be computed. Computational diffractive imagers can be tailored to extract application-specific information or compute decisions (rather than compute an image) based on the optical signal. Both the phase grating and the signal processing can be optimized for the information in the visual field and the task at hand. For example, sequences of interference patterns can be compared to measure changes in angular position, and this information can be used to sense and measure motion. Such interference patterns can also be used for pattern recognition, such as to perform automated face detection and recognition.

公开(公告)号：US09268071B2

公开(公告)日：2016-02-23

申请号：US14824997

申请日：2015-08-12

Applicant: Rambus Inc.

Inventor： Patrick R. Gill ,  David G. Stork

IPC: G02B5/18 ,  G02B27/00 ,  H04N5/225 ,  H04N5/232

CPC classification number: G02B5/1842 ,  G02B5/1871 ,  G02B27/0037 ,  G02B27/0068 ,  G02B27/0087 ,  H04N5/225 ,  H04N5/2254 ,  H04N5/23232 ,  H04N5/23235 ,  H04N5/23245 ,  H04N5/3696 ,  H04N9/045

Abstract: A sensing device with an odd-symmetry grating projects near-field spatial modulations onto a closely spaced photodetector array. The grating includes upper and lower features that define boundaries of odd symmetry. The features include upper and lower segments of various widths on opposite sides of each boundary, the upper segments at a height sufficient to induce one half wavelength of retardation in the band of interest relative to the lower segments. The resultant interference produces the spatial modulations for capture by the array. Photographs and other image information can be extracted from the captured data.

Abstract translation: 具有奇对称光栅的感测装置将近场空间调制投影到紧密间隔的光电检测器阵列上。 光栅包括限定奇对称边界的上部和下部特征。 这些特征包括在每个边界的相对侧上具有各种宽度的上部和下部部分，上部部分的高度足以相对于下部部分在感兴趣的带中引起一半的延迟波长。 所产生的干扰产生用于由阵列捕获的空间调制。 可以从捕获的数据中提取照片和其他图像信息。

公开(公告)号：US20160003994A1

公开(公告)日：2016-01-07

申请号：US14770080

申请日：2014-03-03

Applicant: RAMBUS INC.

Inventor： Patrick R. Gill ,  David G. Stork

IPC: G02B5/30 ,  H04N5/232 ,  G02B5/18

CPC classification number: G02B5/3083 ,  G02B5/1842 ,  G02B5/1871 ,  G02B27/4205 ,  G02B27/46 ,  H01L27/14625 ,  H01L27/14685 ,  H04N5/23232 ,  H04N5/335

Abstract: Image-sensing devices include odd-symmetry gratings that cast interference patterns over a photodetector array. Grating features offer considerable insensitivity to the wavelength of incident light, and also to the manufactured distance between the grating and the photodetector array. Photographs and other image information can be extracted from interference patterns captured by the photodetector array. Images can be captured without a lens, and cameras can be made smaller than those that are reliant on lenses and ray-optical focusing.

Abstract translation: 图像感测装置包括在光电检测器阵列上投射干涉图案的奇对称光栅。 光栅特征对入射光的波长以及光栅与光电检测器阵列之间的制造距离有相当大的不敏感性。 可以从由光电检测器阵列捕获的干涉图案中提取照片和其它图像信息。 图像可以在没有镜头的情况下被捕获，并且相机可以比依赖于镜头和射线光学聚焦的照相机更小。