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. 16, 2013
Filed:
Sep. 14, 2012
Hiroshi Wakai, Hamura, JP;
Hiroshi Wakai, Hamura, JP;
Olympus Corporation, Tokyo, JP;
Abstract
The variable spectroscopic element includes a pair of optical substrates-, four sensors-, four piezoelectric elements 4-4, and a control section. The sensorsare arranged to form symmetry with respect to the center axis, which links gravity centers of mutually facing surfaces of the optical substrates-, and so are the sensors. The control section calculates, from signals of the sensors-, a distance x between the gravity centers of the mutually facing surfaces, and angles θ, φ each of which is formed by a plane perpendicular to the center axis and the facing surface of the movable substrate, to drive the piezoelectric elements-on the basis of the distance x, the angles θ, φ, and to carry out feedback control and feed forward control with respect to at least one of the distance x, the angle θ, and the angle φ.