Optics: measuring and testing – Range or remote distance finding – Triangulation ranging to a point with one projected beam
Patent
1993-10-26
1996-01-16
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
Triangulation ranging to a point with one projected beam
354403, 356 304, G01C 300, G01C 500
Patent
active
054852625
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.
REFERENCES:
patent: 4582424 (1986-04-01), Kawabata
patent: 4941009 (1990-07-01), Yoshida
patent: 5099266 (1992-03-01), Nakajima et al.
patent: 5172155 (1992-12-01), Kosaka
patent: 5210585 (1993-05-01), Suzuki
Ohtsuka Masanori
Tsunemiya Takanobu
Buczinski Stephen C.
Canon Kabushiki Kaisha
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