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, 2014
Filed:
Feb. 14, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Kazutoshi Kawada, Utsunomiya, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An optical apparatus includes a controller configured to control driving of a focus lens in manual focusing. A moving speed of the focus lens is expressed by a function of an operating speed of the operating unit, and the controller generates a control signal for the driver in accordance with the function. When the operating speed of the operating unit is equal to or lower than a threshold, the function is such a linear function that the moving speed of the focus lens linearly increases as the operating speed of the operating unit increases. When the operating speed of the operating unit is higher than the threshold, a differential value of the function increases as the operating speed of the operating unit increases. The function is continuous and smooth at the threshold.