Title:
ABSOLUTE GRAVITY METER BASED ON OPTICAL TWEEZERS IN VACUUM, AND MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/248698
Kind Code:
A1
Abstract:
An absolute gravity meter based on optical tweezers in vacuum, and a measurement method. A micro-nano particle releasing device is internally provided with micro-nano particles, and is located above laser optical tweezers; two beams of capture light in the laser optical tweezers pass through respective focusing lenses and then converge at an intersection point, an area where the intersection point is located serves as a light trap capture area, and the micro-nano particles are stably captured in the light trap capture area by the two beams of capture light; and an optical interferometer is electrically connected to a signal processing device, the optical interferometer measures displacement of the micro-nano particles in real time in a free fall process starting from the light trap capture area, and sends same to the signal processing device, and the signal processing device obtains a measurement value of the absolute gravitational acceleration by means of processing by a method according to the real-time displacement of the micro-nano particles. The absolute gravity is measured by measuring the displacement and time of the micro-nano particles in the free fall process in real time, eliminating the interference of the ambient air, and the measurement of the absolute gravitational acceleration can be realized, improving the measurement speed and efficiency.
Inventors:
CHEN XINGFAN (CN)
LIU YISHI (CN)
GAO XIAOWEN (CN)
LI NAN (CN)
HU HUIZHU (CN)
LIU CHENG (CN)
LIU YISHI (CN)
GAO XIAOWEN (CN)
LI NAN (CN)
HU HUIZHU (CN)
LIU CHENG (CN)
Application Number:
PCT/CN2020/112092
Publication Date:
December 16, 2021
Filing Date:
August 28, 2020
Export Citation:
Assignee:
UNIV ZHEJIANG (CN)
ZHEJIANG LAB (CN)
ZHEJIANG LAB (CN)
International Classes:
G01V7/14; G01J9/02
Foreign References:
| CN109814165A | 2019-05-28 | |||
| CN104765075A | 2015-07-08 | |||
| CN102346261A | 2012-02-08 | |||
| US20160178792A1 | 2016-06-23 | |||
| KR20110131975A | 2011-12-07 | |||
| CN108897057A | 2018-11-27 |
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE CO., LTD. (CN)
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