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:
Apr. 04, 2017
Filed:
Aug. 24, 2016
Applicant:
Nikon Corporation, Tokyo, JP;
Inventors:
Naoyasu Uehara, Sagamihara, JP;
Motofusa Kageyama, Fujisawa, JP;
Assignee:
NIKON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 61/30 (2006.01); H01J 61/62 (2006.01); H01J 63/08 (2006.01); C01F 11/22 (2006.01); C30B 29/12 (2006.01); C30B 29/66 (2006.01); B65D 51/24 (2006.01);
U.S. Cl.
CPC ...
H01J 61/302 (2013.01); B65D 51/248 (2013.01); C01F 11/22 (2013.01); C30B 29/12 (2013.01); C30B 29/66 (2013.01);
Abstract
There is provided a calcium fluoride optical member formed from monocrystalline calcium fluoride and having a tubular shape. A {110} crystal plane or a {111} crystal plane of the monocrystalline calcium fluoride is orthogonal to a center axis of the tube.