公开(公告)号：US11372146B2

公开(公告)日：2022-06-28

申请号：US17008663

申请日：2020-09-01

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hao Jiang ,  Song Zhang ,  Honggang Gu ,  Shiyuan Liu

IPC: G02B5/30 ,  G01B11/00

Abstract: A method and a device for real-time attitude angle measurement based on the field of view effect of the birefringent crystal are provided. The device includes a high-speed polarization measurement module and an object attitude adjustment module connected to each other. The high-speed polarization measurement module includes a polarizer unit and a real-time polarization analyzer unit, respectively located on two opposite sides of the object attitude adjustment module. The object attitude adjustment module includes an attitude angle controller, a roll angle adjustment unit, a pitch angle adjustment unit, a yaw angle adjustment unit, and a height adjustment unit respectively connected to the attitude angle controller, and a birefringent crystal. The method includes an algorithm for real-time extraction of object attitude angle according to optical parameters measured by the high-speed polarization measurement module, and a method for compensating attitude angle measurement errors.

公开(公告)号：US20210302640A1

公开(公告)日：2021-09-30

申请号：US17008663

申请日：2020-09-01

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hao Jiang ,  Song Zhang ,  Honggang Gu ,  Shiyuan Liu

IPC: G02B5/30 ,  G01B11/00

Abstract: A method and a device for real-time attitude angle measurement based on the field of view effect of the birefringent crystal are provided. The device includes a high-speed polarization measurement module and an object attitude adjustment module connected to each other. The high-speed polarization measurement module includes a polarizer unit and a real-time polarization analyzer unit, respectively located on two opposite sides of the object attitude adjustment module. The object attitude adjustment module includes an attitude angle controller, a roll angle adjustment unit, a pitch angle adjustment unit, a yaw angle adjustment unit, and a height adjustment unit respectively connected to the attitude angle controller, and a birefringent crystal. The method includes an algorithm for real-time extraction of object attitude angle according to optical parameters measured by the high-speed polarization measurement module, and a method for compensating attitude angle measurement errors.

公开(公告)号：US10739251B2

公开(公告)日：2020-08-11

申请号：US16126230

申请日：2018-09-10

Applicant: Huazhong University of Science and Technology

Inventor： Hao Jiang ,  Jiamin Liu ,  Shiyuan Liu ,  Song Zhang ,  Zhicheng Zhong ,  Xiuguo Chen ,  Honggang Gu

IPC: G01N21/21 ,  G02B5/30

Abstract: The present invention discloses a high temporal resolution Mueller matrix elliptical polarization measuring device and method. In the incident light path, four polarization modulation channels are used to split and modulate a pulse laser beam into four polarized beams in independent polarization states. Due to different light path differences, the pulse beams have a time interval of several nanoseconds, and thus four pulse laser beams are successively irradiated on the surface of the sample. In the reflected light path, six channel polarization detection modules are used to synchronously measure the Stokes vectors of the reflected beams on the sample surface. By using known incident and reflected Stokes vectors of the four pulse beams, linear equations can be solved to obtain the Mueller matrix of the sample.