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:
Jan. 16, 1996
Filed:
Oct. 26, 1993
Takanobu Tsunemiya, Yokohama, JP;
Masanori Ohtsuka, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A distance measuring apparatus includes a first light projecting device for projecting a light to a projection range, and a first light receiving device arranged along a base length direction thereof, for receiving a reflection light of the light projected from the first light projecting device. The first light receiving device has a first position sensor to detect, in accordance with a position of light reception, a distance to an object, the object being located at least within a middle distance. A second light projecting device, provided independent of the first light projecting device, projects a light to substantially the same projection range as the first light projecting device. A second light receiving device, arranged in a direction different from the base length direction of the first light receiving device, receives a reflection light of the light projected from the second light projecting device. The second light receiving device includes (i) a second position sensor to detect, in accordance with a position of light reception, a distance to an object, the object being located at least within a near distance range, and (ii) a third sensor, disposed at a position corresponding to light reception for an object which is located within a far distance range, to detect a distance to the object in the far distance range.