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:
Jun. 17, 2008
Filed:
Feb. 03, 2005
Isao Minegishi, Tokyo, JP;
Isao Minegishi, Tokyo, JP;
Topcon Corporation, Tokyo, JP;
Abstract
A deformable mirror control device is provided with improved response characteristic by devising the mode of control even if the deformable mirror has a large time constant in comparison with the response speed required in applications such as the retinal camera. The deformable mirror device comprises a deformable mirrorhaving a reflective surface deformed with an applied voltage, and a voltage control circuitfor controlling the voltage applied to the deformable mirrorHere, the voltage control circuitproduces a steady-state voltage at which the reflective surface of the deformable mirrortakes an intended shape in a steady state, and produces a transient voltage that causes the reflective surface of the deformable mirrorto deform toward the intended shape, and also produces a transient voltage that causes the shape of the reflective surface of the deformable mirrorto shift quickly toward the intended shape.