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:
Nov. 08, 2011
Filed:
Feb. 20, 2009
Yasuhiro Muraoka, Gunma, JP;
Masaharu Sakazume, Kanagawa, JP;
Yoshimaru Nakane, Gunma, JP;
Hiroshi Yoshida, Gunma, JP;
Shinya Tsukada, Tochigi, JP;
Yasuhiro Muraoka, Gunma, JP;
Masaharu Sakazume, Kanagawa, JP;
Yoshimaru Nakane, Gunma, JP;
Hiroshi Yoshida, Gunma, JP;
Shinya Tsukada, Tochigi, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
An inspecting method for an object lens driving device including a base, an objective lens, a holder for holding the objective lens on the base, and a drive mechanism for driving the holder so as to move the objective lens in the focus direction, the method comprising the steps of: emitting a laser beam through the objective lens; allowing the laser beam emitted through the objective lens to pass through an aperture having a predetermined diameter; applying to the drive mechanism a drive voltage for moving the holder between a first position closest to a surface of the base and a second position farther than the first position from the surface of the base; performing photoelectric conversion of the laser beam having passed through the aperture; and inspecting the objective lens driving device based on a signal obtained by the photoelectric conversion.