Optical system of a theodolite

Details Optical system of a theodolite Optical system of a theodolite

1983-01-17

1984-05-01

Rosenberger, R. A.

Optics: measuring and testing

Angle measuring or angular axial alignment

Relative attitude indication along 3 axes with photodetection

33281, 356147, G01C 100

Patent

active

044457774

ABSTRACT:
An optical system of a theodolite has an altitude angle scale plate having an altitude scale, a horizontal angle scale plate having a horizontal angle scale, a light path combining member for combining the light paths from the two scale plates, a rectangular prism member provided between one of the two scale plates and the light path combining member and having slant faces orthogonal to each other, the light beam from said one of the two scale plates being reflected by the inner surfaces of the orthogonal slant faces of the rectangular prism and thereafter reaching the light path combining member, an objective lens disposed at the exit side of the light path combining member to form the images of the scales on the two scale plates and a focusing screen on which the images of the scales by the objective lens are formed.

REFERENCES:
patent: 2363877 (1944-11-01), Larsen et al.
patent: 2552893 (1951-05-01), Hillman et al.
patent: 2837956 (1958-06-01), Schneider
patent: 3417394 (1968-12-01), Sauberlich
patent: 3557458 (1971-01-01), Shultz

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