公开(公告)号：US20240310243A1

公开(公告)日：2024-09-19

申请号：US18398607

申请日：2023-12-28

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Mingfeng LU ,  Tianshan ZHANG ,  Peihang LI ,  Chenchen JI ,  Jinmin WU ,  Yao HU ,  Weidong HU ,  Feng ZHANG ,  Ran TAO

IPC: G01M11/00 ,  G06T7/60

CPC classification number: G01M11/30 ,  G06T7/60 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/20132

Abstract: The present application relates to an interferogram phase estimation method. The interferogram phase estimation method includes: obtaining an interferogram for estimation of a measured object; and inputting the interferogram for estimation to a neural network model trained based on a method for training a neural network model for interferogram phase estimation, to obtain a phase image corresponding to the interferogram for estimation. In the interferogram phase estimation method of the present application, features of different scales of an interferogram are learned based on a Unet++ neural network model to obtain an accurately estimated phase image corresponding to the interferogram.

公开(公告)号：US20220317437A1

公开(公告)日：2022-10-06

申请号：US17617318

申请日：2021-02-08

Applicant: Beijing Institute of Technology

Inventor： Qun HAO ,  Xuemin CHENG ,  Yao HU ,  Xu CHANG

IPC: G02B26/08 ,  G06N3/08

Abstract: A method for controlling a deformable mirror surface shape based on a radial primary function processes samples of a neural network training set, obtains elements of the neural network training set, characterizes the complex surface shape of the deformable mirror in each sample by using a radial primary function, takes characterization parameters of the surface shape in the each sample as an input of a neural network, and trains the neural network by taking a voltage of each piezoelectric ceramic corresponding to the complex surface shape as a corresponding output of the neural network. Training times of the neural network are consistent with a number of the samples. Finally, the trained neural network is obtained to verify the training effect of the neural network. According to the characterization parameters of the required surface, the neural network is used to control the deformable mirror to generate the required surface.

公开(公告)号：US20220252391A1

公开(公告)日：2022-08-11

申请号：US17617315

申请日：2021-02-08

Applicant: Beijing Institute of Technology

Inventor： Qun HAO ,  Yao HU ,  Zhen WANG ,  Shaopu WANG

IPC: G01B11/24 ,  G02B27/28 ,  G02B5/30

Abstract: A transient digital moire phase-shifting interferometric measuring device and method for a surface shape of an optical element solves a defect that an instantaneous vibration resistance needs to be sacrificed for a measurement range when using a two-step carrier splicing method, and expands the measurement range of a digital moire phase-shifting method while retaining instantaneous anti vibration characteristics of the digital moire phase-shifting method. The transient digital moire phase-shifting interferometric measuring device includes a light source, a beam splitter, a reference lens, a first polarization grating, a measured lens, a second polarization grating, a first imaging objective lens, a first camera, a second imaging objective lens and a second camera. Different carriers are loaded through a spectral performance of a polarization grating, and the polarization grating is used to separate two beams of an interference light, and two actual interference patterns are obtained at a same time.