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:
Jan. 30, 2024
Filed:
Feb. 28, 2020
Applicant:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Inventors:
Hiroshi Ohno, Tokyo, JP;
Takashi Usui, Saitama Saitama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02S 40/22 (2014.01); F21V 5/04 (2006.01); G02B 3/06 (2006.01);
U.S. Cl.
CPC ...
H02S 40/22 (2014.12); F21V 5/043 (2013.01); G02B 3/06 (2013.01);
Abstract
According to one embodiment, an optical element includes a continuous gradient index distribution area, and a first medium. The continuous gradient index distribution area is configured to continuously attenuate gradient index from a center of the optical element in a radial direction. The first medium is at the center. The first medium includes an area where absolute value of imaginary part of a complex refractive index is greater than zero.