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:
Dec. 09, 2014
Filed:
Oct. 20, 2011
Fumiaki Ohno, Fujimino, JP;
Fumiaki Ohno, Fujimino, JP;
New Japan Radio Co., Ltd., Tokyo-to, JP;
Abstract
There is provided a position detecting device using reflection type photosensors in which a position sensing of lens located not less than 1 mm apart from a sensor can be conducted. A pair of reflection type photosensors PRand PRare oppositely arranged, a double sided reflectorattached on a movable body is movably arranged between the pair of reflection type photosensors and a position of the double sided reflectoris detected from the outputs of these reflection type photosensors. In the position detecting device of the present invention, an operating formula in which linear values are obtained depending on a moving distance of the double sided reflector can be used. For example, when an output of one of the pair of reflection type photosensors is Vo, and an output of the other is Vo, the position detecting is conducted using the operating formula of (Vo−Vo)/(Vo+Vo).