Optics: measuring and testing – Fiducial instruments – Artificial reference
Patent
1998-01-07
1999-08-31
Kim, Robert H.
Optics: measuring and testing
Fiducial instruments
Artificial reference
3561391, 3561412, G01B 1126, G01C 918
Patent
active
059460873
ABSTRACT:
The present invention provides a laser survey instrument, which comprises a rotary irradiation system main unit and an object reflector, wherein said object reflector has reflection sectors divided into two or more, at least one of the reflection sectors has a reflection surface with shape gradually changing, and said rotary irradiation system main unit comprises a light emitter for emitting a polarized irradiation light beam, a rotator for rotating and irradiating the polarized irradiation light beam toward the object reflector and for detecting an irradiating direction, a tilt setting unit for tilting a rotary irradiation plane of the polarized irradiation light beam, a detecting means for detecting a polarized reflection light beam entering the rotary irradiation system main unit via said rotator and reflected from said object reflector, a reflection light detecting circuit for identifying the object reflector from output of the detecting means, and a control unit for tracing said object reflector by operating said tilt setting unit based on detecting condition of said reflection light detecting circuit and for tilting the rotation plane of said polarized irradiation light beam.
REFERENCES:
patent: 4830489 (1989-05-01), Cain et al.
patent: 5361217 (1994-11-01), Makimura et al.
patent: 5485266 (1996-01-01), Hirano et al.
patent: 5742387 (1998-04-01), Ammann
patent: 5774211 (1998-06-01), Ohtomo et al.
Hayase Shin-ichi
Kasori Naoto
Yoshino Ken-ichiro
Kabushiki Kaisha Topcon
Kim Robert H.
Stafira Michael P.
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