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. 28, 2011
Filed:
Oct. 10, 2008
Fumihiko Kamizono, Itabashi-ku, JP;
Kunihiro Hayashi, Itabashi-ku, JP;
Fumihiko Kamizono, Itabashi-ku, JP;
Kunihiro Hayashi, Itabashi-ku, JP;
Kabushiki Kaisha TOPCON, Tokyo-to, JP;
Abstract
A rotary laser projecting device comprising a reference plane forming unit that projects two or more fan-shaped laser beams, a distance measuring unit that projects distance measuring light, a rotator for projecting the fan-shaped laser beams and the distance measuring light by rotary irradiation, a horizontal angle detecting unit, a photodetection unit for receiving the reflected fan-shaped laser beams and the reflected distance measuring light, a storage unit, and a control arithmetic unit is disclosed. The control arithmetic unit measures elevation angle of the object reflector from time difference of photodetection between the two or more laser beams, measures horizontal angle of the object based on the result of detection of the horizontal angle detecting unit when at least one of the reflected fan-shaped laser beams and the reflected distance measuring light is received and the distance measuring unit measures a distance to the object to be measured.