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US 5,847,824 AGranted
Automatic angle compensator
AssigneeTopcon Corporation
InventorsFumio Ohtomo, Hiroo Sugai, Ikuo Ishinabe, Jun-ichi Kodaira
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AssigneeTopcon Corporation
InventorsFumio Ohtomo, Hiroo Sugai, Ikuo Ishinabe, Jun-ichi Kodaira
Estimating the term…
An automatic angle compensator comprising a liquid sealing container 4 having transparent liquid to form a free liquid surface 1 sealed therein, light projecting systems 21 and 22 for projecting light at a given angle to the free liquid surface, and an optical system for guiding the light beam, which is reflected by the free liquid surface and irradiated from the liquid sealing container, whereby optical axis of the light beam reflected by the free liquid surface is aligned with optical axis of the optical system regardless of whether the free liquid surface is turned by 0.degree. or 90.degree., and automatic compensation can be achieved regardless of whether the system is positioned in horizontal or vertical directions.
An automatic angle compensator, comprising a liquid sealing container with transparent liquid to form a free liquid surface sealed therein, a first light projecting system for directing a first light beam at a given angle to the free liquid surface so that it is reflected as a first reflected light beam by the free liquid surface, a second light projecting system arranged face-to-face to the first light projecting system with the free liquid surface therebetween and for directing a second light beam at a given angle to the free liquid surface so that the second light beam is reflected as a second reflected light beam by the free liquid surface when said liquid sealing container, said first light projecting system, said second light projecting system, and the hereinafter-recited projecting optical system are rotated by 90.degree. around an axis which runs perpendicularly or almost perpendicularly to a plane including said first and second light beams, and the projecting optical system for guiding and projecting said first reflected and said second reflected light beams reflected by the free liquid surface.
An automatic angle compensator, comprising a liquid sealing container with transparent liquid to form a free liquid surface sealed therein, a light projecting system for directing a light beam at a given angle to the free liquid surface, a first reflecting member for reflecting and guiding the light beam reflected as a first reflected light beam by the free liquid surface when said liquid sealing container, said light projecting system, said first reflecting member, the hereinafter-recited second reflecting member, and the hereinafter-recited projecting optical system are inclined by 0.degree., and a second reflecting member arranged face-to-face to the first reflecting member and for reflecting and guiding the light beam reflected as a second reflected light beam by the free liquid surface when said liquid sealing container, said light projecting system, said first reflecting member, said second reflecting member, and the hereinafter-recited projecting optical system are rotated by 90.degree. around an axis which runs perpendicularly or almost perpendicularly to a plane including said light beam directed by said light projecting system, and the projecting optical system for projecting said first and second reflected light beams reflected by the free liquid surface.
An automatic angle compensator, comprising a liquid sealing container having transparent liquid to form a free liquid surface sealed therein, a light projecting system for irradiating a light beam at a given angle to the free liquid surface, a first reflecting member for reflecting and guiding again the light beam reflected as a first reflected light beam by the free liquid surface toward the free liquid surface when said liquid sealing container, said light projecting system, said first reflecting member, the hereinafter-recited second reflecting member, and the hereinafter-recited projecting optical system are inclined by 0.degree., and a second reflecting member arranged face-to-face to the first reflecting member and for reflecting and guiding again the light beam reflected as a second reflected light beam by the free liquid surface toward the free liquid surface when said liquid sealing container, said light projecting system, said first reflecting member, said second reflecting member, and the hereinafter-recited projecting optical system are rotated by 90.degree. around an axis which runs perpendicularly or almost perpendicularly to a plane including said light beam irradiated by said light projecting system, and the projecting optical system for guiding and projecting said first and second reflected light beams reflected again by the free liquid surface.
Dependencies are inferred from the claim text.