Title:
ELECTRON GUN, ELECTRON GUN CONTROL METHOD AND CONTROL PROGRAM, AND THREE-DIMENSIONAL SCULPTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/110996
Kind Code:
A1
Abstract:
The objective of this invention is to prevent a decrease in the brilliance of an electron beam when an emission current is changed. The electron gun comprises a cathode (111) for emitting a thermal electron, a Wehnelt electrode (112) for focusing the thermal electron, a control electrode (113) for drawing the thermal electron from the forward end of the cathode (111), an anode (114) whereby the thermal electron is accelerated and irradiated as an electron beam onto a powder, and an optimal conditions collection control means (105) that changes at least any one among the bias voltage applied to the Wehnelt electrode (112) and the control electrode voltage applied to the control electrode (113) in order to determine a combination of the bias voltage and the control electrode voltage for which the brilliance of the electron beam forms a peak.
Inventors:
SATO TAKASHI (JP)
Application Number:
PCT/JP2015/050460
Publication Date:
July 14, 2016
Filing Date:
January 09, 2015
Export Citation:
Assignee:
TECHNOLOGY RES ASS FOR FUTURE ADDITIVE MFG (JP)
International Classes:
H01J37/06; H01J37/04
Foreign References:
| JP2000011932A | 2000-01-14 | |||
| JP2010261072A | 2010-11-18 | |||
| JPH01274349A | 1989-11-02 |
Other References:
See also references of EP 3065161A4
Attorney, Agent or Firm:
KATO Takashi et al. (JP)
Takushi Kato (JP)
Takushi Kato (JP)
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