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. 25, 2002
Filed:
Oct. 05, 1999
Koji Uchida, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is an ophthalmic apparatus having a measurement unit for measuring an eye to be examined, an illumination light source, disposed near the measurement unit, for illuminating the eye, an area sensor for picking up an image of the anterior part of the eye illuminated by the illumination light source, a driver for driving the measurement unit relative to the eye forward or backward, and a determining unit for determining whether signal levels throughout the whole area of the area sensor are not more than a predetermined level. When the determining unit determines that the signal levels are not more than the predetermined level, it is judged that the apparatus is too close to the eye and the driver drives the measurement unit away from the anterior part of the eye.