The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2019
Filed:
Feb. 08, 2018
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Ryo Fujita, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto-shi, Kyoto, JP;
Abstract
A shielding platehaving a forward-side slit openingand return-side slit openingis placed in a free flight spacewith no electric field. Ions which significantly deviate from a reference path are removed by the shielding plateon both the forward-side and return-side paths. The opening width of the forward-side slit openingis smaller than that of the return-side slit opening. Those opening widths and the placement position of the shielding plateare determined based on the result of an ion trajectory calculation by accurate simulation. As compared to a conventional device with a shielding plate placed only on the return side, the present configuration allows for an increase in the opening width of the return-side slit opening while achieving the same level of resolving power. The ion transmission ratio is thereby improved, and the analytical sensitivity is enhanced.