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:
May. 16, 2000
Filed:
Apr. 22, 1999
Shigeo Enomoto, Tokyo, JP;
Asahi Kogaku Kabushiki Kaisha, Tokyo, JP;
Abstract
Binoculars are provided with correction lenses which correct a trembling of a focused image. The correction lenses are driven by stepping motors. The difference between an angular position data of optical axes of the binoculars and a driving amount of the correction lenses driven by the stepping motors is calculated. If the difference exceeds a positive threshold value, the stepping motor is rotated clockwise, and if the difference is below a negative threshold value, the stepping motor is rotated counterclockwise in order to cancel the difference. When the difference is between the positive threshold value and the negative threshold value, the stepping motor is not rotated. The threshold value is determined to be a quarter of the driving amount of the correction lenses, which corresponds to one rotational step of the stepping motor.