公开(公告)号：US11255767B2

公开(公告)日：2022-02-22

申请号：US17372419

申请日：2021-07-10

Applicant: Zhejiang Lab ,  Zhejiang University

Inventor： Zhenhai Fu ,  Cheng Liu ,  Zhiming Chen ,  Xingfan Chen ,  Nan Li ,  Huizhu Hu

IPC: G01N15/02 ,  G01N15/06 ,  G03H1/00

Abstract: A method and a device for measuring light field distribution are provided; including steps of utilizing the optical trap to stably levitating particles, moving the optical trap to bring the particles close to the light field to be measured, and utilizing the photodetector to collect the scattered light signals of the particles at different positions in the three-dimensional space of the light field to be measured, and calculating the light field distribution of the light field to be measured according to the scattered light intensity which is proportional to the light intensity at that position. The device for measuring the optical field distribution includes a laser, an optical trapping path, particles, a photodetector, a control system and an upper computer; the laser emits a laser, passes through the optical trapping path, and emits highly focused captured light B to form an V optical trap to capture particles.

公开(公告)号：US12174335B2

公开(公告)日：2024-12-24

申请号：US17927748

申请日：2020-08-28

Applicant: ZHEJIANG UNIVERSITY ,  ZHEJIANG LAB

Inventor： Xingfan Chen ,  Yishi Liu ,  Xiaowen Gao ,  Nan Li ,  Huizhu Hu ,  Cheng Liu

IPC: G01V7/14 ,  G01J9/02 ,  G01V7/04

Abstract: An absolute gravimeter and a measurement method based on vacuum optical tweezers. The micro-nano particle releasing device is equipped with micro-nano particles, and is located above laser optical tweezers, and the laser optical tweezers have two capturing beams which pass through the respective convergent lenses and then converge at an intersection. An area where the intersection is located serves as an optical trap capturing region, and the micro-nano particles are stably captured by the two capturing beams in the optical trap capturing region. The optical interferometer is electrically connected to the signal processing device, the optical interferometer measures a displacement of the micro-nano particles in real time at the beginning of a free fall process from the optical trap capturing region and sends the displacement signal to the signal processing device. The signal processing device obtains a measured value of an absolute gravitational acceleration.

公开(公告)号：US20210333190A1

公开(公告)日：2021-10-28

申请号：US17372419

申请日：2021-07-10

Applicant: Zhejiang Lab ,  Zhejiang University

Inventor： Zhenhai Fu ,  Cheng Liu ,  Zhiming Chen ,  Xingfan Chen ,  Nan Li ,  Huizhu Hu

IPC: G01N15/02 ,  G01N15/06

Abstract: A method and a device for measuring light field distribution are provided; including steps of utilizing the optical trap to stably levitating particles, moving the optical trap to bring the particles close to the light field to be measured, and utilizing the photodetector to collect the scattered light signals of the particles at different positions in the three-dimensional space of the light field to be measured, and calculating the light field distribution of the light field to be measured according to the scattered light intensity which is proportional to the light intensity at that position. The device for measuring the optical field distribution includes a laser, an optical trapping path, particles, a photodetector, a control system and an upper computer; the laser emits a laser, passes through the optical trapping path, and emits highly focused captured light B to form an V optical trap to capture particles.