公开(公告)号：US20170299698A1

公开(公告)日：2017-10-19

申请号：US15513632

申请日：2016-01-06

Applicant: NTT ADVANCED TECHNOLOGY CORPORATION

Inventor： Shogo Yagi ,  Fumio Saito ,  Kazunori Naganuma ,  Eiichi Sugai ,  Tohru Kodaira ,  Akira Sawaguchi ,  Hideki Hagino ,  Takeshi Watanabe ,  Noriyuki Ishidu ,  Hiizu Takemura

IPC: G01S7/481 ,  G01S17/36 ,  G01S17/10

CPC classification number: G01S7/4814 ,  G01C3/08 ,  G01C7/06 ,  G01C15/002 ,  G01S17/10 ,  G01S17/36

Abstract: Provided is a position locating instrument for a position locating method in which position locating instruments that transmit and receive light beams are arranged in series connection. The position locating instruments reduce error factors and improve measurement accuracy by providing all or some of necessary position and attitude parameters. The position locating instrument has at least one light emission port through which light from a wavelength-changeable light source is emitted; and at least one light receiving port that receives light emitted or reflected by an adjacent position locating instrument. The light emitted from the light emission port has a fanlike pattern and has an emission angle varying, as a monotonic function of a wavelength of the light, in a direction perpendicular to a direction in which the light spreads in the fanlike pattern.