Surveying instrument and method

Details Surveying instrument and method Surveying instrument and method

1976-11-18

1978-09-12

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250231SE, 356 4, 356152, G01C 308, G01B 1126

Patent

active

041133811

ABSTRACT:
A tacheometer utilizes a gallium arsenide laser diode in a phase shifting distance encoder, a sinusoidal interpolator in a phase shifting shaft angle encoder, a mercury pool in a phase shifting two axis off-level encoder, a shared phase to digital decoder and a digital processor, to measure angles and distances corrected for off-level, speed of light variations, refraction and the earth's curvature.

REFERENCES:
patent: 3779645 (1973-12-01), Nakazawa et al.
patent: 3855461 (1974-12-01), Stockwell
patent: 3895871 (1975-07-01), Strasser
M. L. Bullock et al. Hewlett-Packard Journal, vol. 27, No. 8, pp. 2-12, Apr. 1976.
Aga Geodimeter 700, Brochure; Aga Corp.; Secaucus, N.J. Mar. 1972.
Reg Elta 14 Advertisement, Zeiss, W. Germany. Feb. 1975.

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