公开(公告)号：US20220164634A1

公开(公告)日：2022-05-26

申请号：US17517085

申请日：2021-11-02

Applicant: Tsinghua University

Inventor： Qionghai DAI ,  Tiankuang ZHOU ,  Xing LIN ,  Jiamin WU

IPC: G06N3/04 ,  G06N3/067 ,  G06N20/00

Abstract: An optical diffractive processing unit includes input nodes, output nodes; and neurons. The neurons are connected to the input nodes through optical diffractions. Weights of connection strength of the neurons are determined based on diffractive modulation. Each optoelectronic neuron is configured to perform an optical field summation of weighted inputs and generate a unit output by applying a complex activation to an optical field occurring naturally in a photoelectronic conversion. Each neuron is a programmable device.

公开(公告)号：US20180210187A1

公开(公告)日：2018-07-26

申请号：US15459623

申请日：2017-03-15

Applicant: Tsinghua University

Inventor： Qionghai DAI ,  Jijun HE ,  Jiamin WU

IPC: G02B21/36 ,  G02B27/10 ,  G02B3/00 ,  G02B21/16 ,  G02B21/18 ,  G02B21/02 ,  H04N13/02 ,  H04N5/225

CPC classification number: H04N13/204 ,  G02B21/0004 ,  G02B21/16 ,  G02B21/361 ,  G02B21/365 ,  G02B27/0075 ,  G02B27/106 ,  G02B27/1086 ,  H04N13/236 ,  H04N2213/001

Abstract: The three-dimensional microscopic imaging system includes: a microscope; a field diaphragm; a narrow-band filter, configured to perform narrow-band filtering; a beam-splitting grating, configured to duplicate a beam into beams with different angles; a lens array with different focal length, configured to perform different phase modulation to each beam with different angles; a micro lens array, configured to modulate the beams with different angles that pass through the lens array with different focal length respectively to different spatial locations at a back focal plane of the micro lens array respectively; and an image sensor configured to record an image corresponding to the modulated beams at the back focal plane of the micro lens array. The system has a simple structure, a cheap cost, and a relatively weak exciting light, and is suit for living samples, and has the adjustable intervals of imaging depths.

公开(公告)号：US20200241276A1

公开(公告)日：2020-07-30

申请号：US16357811

申请日：2019-03-19

Applicant: TSINGHUA UNIVERSITY

Inventor： Qionghai Dai ,  Zhi Lu ,  Jiamin WU

IPC: G02B21/36 ,  G02B21/22 ,  H04N13/204

Abstract: Provided are a 3D microscopic imaging method and a 3D microscopic imaging system. The method includes: acquiring a first PSF of a 3D sample from an object plane to a plane of a main camera sensor and a second PSF of the 3D sample from the object plane to a plane of a secondary camera sensor, and generating a first forward projection matrix corresponding to the first PSF and a second forward projection matrix corresponding to the second PSF; acquiring a light field image captured by the main camera sensor and a high resolution image captured by the secondary camera sensor; generating a reconstruction result of the 3D sample by reconstructing the light field image, the first forward projection matrix, the high resolution image and the second forward projection matrix according to a preset algorithm.

公开(公告)号：US20180231761A1

公开(公告)日：2018-08-16

申请号：US15490313

申请日：2017-04-18

Applicant: Tsinghua University

Inventor： Qionghai DAI ,  You ZHOU ,  Jiamin WU ,  Jingtao FAN

IPC: G02B21/36 ,  H04N5/225 ,  H04N5/235 ,  H04N9/04 ,  H04N5/232 ,  H04N9/64 ,  G02B21/06 ,  G02B13/00

CPC classification number: G02B21/367 ,  G02B13/0095 ,  G02B21/06 ,  G02B21/361 ,  H04N5/23232 ,  H04N5/2354 ,  H04N9/045 ,  H04N9/64

Abstract: The present disclosure relates to Fourier ptychographic microscopy systems and methods. The system includes: a three-color LED array; a microscope, configured to obtain image information with multi-wavelength, and magnify to generate magnified image information; an RGB camera configured to acquire a first color image with a first resolution based on the magnified image information; and a controller, configured to synchronously control the three-color LED array and the RGB camera, in which the three-color LED array is further configured to display a plurality of illumination patterns, the RGB camera is further configured to acquire synchronously a plurality of first color images, and the controller is further configured to restore a single second image with a second resolution according to the plurality of first color images, and the first resolution is less than the second resolution. The present disclosure improves sampling speed.

公开(公告)号：US20230117456A1

公开(公告)日：2023-04-20

申请号：US17964845

申请日：2022-10-12

Applicant: TSINGHUA UNIVERSITY

Inventor： Qionghai DAI ,  Jiyuan ZHENG ,  Chenchen DENG ,  Jiamin WU

IPC: H04B10/556

Abstract: The present disclosure relates to optical logic element technologies, and more particularly, to an optical logic element for photoelectric digital logic operation and a logic operation method thereof. Here, the element includes a driver member configured to drive a photoelectric integrated member, generate digital modulation information that is capable of being recognized by the photoelectric integrated member, and read an electrical signal outputted by the photoelectric integrated member; and the photoelectric integrated member configured to carry, by using a coherent optical signal, the digital modulation information inputted by the drive member, and perform, in a predetermined optical diffraction neural network, a digital logic operation on the coherent optical signal to obtain an operation result, generate, from the operation result based on a digital logic mapping relationship, the electrical signal, and output, after reading the electrical signal by using the drive member, the operation result.