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:
Feb. 27, 1996
Filed:
Jan. 19, 1995
Applicant:
Inventors:
Matsuomi Nishimura, Ohmiya, JP;
Kazuo Isaka, Tokyo, JP;
Tadashi Okamoto, Yokohama, JP;
Kazumi Tanaka, Yokohama, JP;
Toshikazu Onishi, Tokyo, JP;
Takeshi Miyazaki, Ebina, JP;
Hidehito Takayama, Chigasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G01N / ;
U.S. Cl.
CPC ...
250251 ; 356 39 ; 356335 ; 356343 ; 356338 ; 2502222 ;
Abstract
A flow of liquid containing floating fine particles is formed in a flow path, thereby causing successive movement of the particles. A light beam having intensity distribution from a laser is focused on the liquid flow, whereby the particle is optically trapped at the irradiating position, thus being stopped against the liquid flow or being slowed by a braking force. This phenomenon is utilized in controlling the spacing of the particles in the flow or in separating the particles.