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:
Jul. 08, 2014
Filed:
Jan. 06, 2012
Kenji Okabe, Kawasaki, JP;
Seiji Shimokawa, Kawasaki, JP;
Kazuki Kitagawa, Kawasaki, JP;
Mitutoyo Corporation, Kawasaki, JP;
Abstract
An autofocus device including: an optical source; an optical unit that allows emitted light from the optical source and object light from a measurement target to pass through the same optical path, the optical unit being arranged between the optical source and the measurement target; and a detection unit that performs focus detection by using the object light passed through the optical unit. The optical unit includes: a tube lens that forms the emitted light into parallel light; an image forming unit that forms a continuous line image on a surface of the measurement target; and a rotation unit that rotates the continuous line.