Title:
MAGNETIC LENS AND EXCITING CURRENT CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/107823
Kind Code:
A1
Abstract:
A magnetic lens is disclosed, which includes: a magnetic yoke (10), an exciting coil (20) and a power supply controlling system (30). The magnetic yoke (10) is at outside of the exciting coil (20) and surrounds the coil (20)； the exciting coil (20) is made up of litz wires； the power supply controlling system (30) is arranged to supply power to the exciting coil (20) and control the flow directions and magnitudes of the currents in the exciting coil (20). A method for controlling the magnetic lens is also disclosed.
Inventors:
HE WEI (CN)
LI SHUAI (CN)
LI SHUAI (CN)
Application Number:
PCT/CN2017/100465
Publication Date:
June 21, 2018
Filing Date:
September 05, 2017
Export Citation:
Assignee:
FOCUS EBEAM TECH BEIJING CO LTD (CN)
International Classes:
H01J37/141; H01J37/24
Domestic Patent References:
| WO2013015311A1 | 2013-01-31 |
Foreign References:
| CN106783492A | 2017-05-31 | |||
| CN206451681U | 2017-08-29 | |||
| CN104299872A | 2015-01-21 | |||
| JP2004319378A | 2004-11-11 | |||
| JPH04116347U | 1992-10-16 | |||
| US20040164831A1 | 2004-08-26 | |||
| GB2405524A | 2005-03-02 |
Other References:
See also references of EP 3357079A4
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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