Surveying method and apparatus

Details Surveying method and apparatus Surveying method and apparatus

1982-10-20

1984-09-04

Yasich, Daniel M.

Optics: measuring and testing

Range or remote distance finding

With photodetection

33 1H, 354 77, 356248, 356376, G01B 1124, G01D 942

Patent

active

044694180

ABSTRACT:
A device for producing a plane of light includes a ring flash and/or halogen lamps mounted in a casing defining an inner peripheral aperture slot and an outer peripheral aperture slot coplanar with the inner slot. The device is used in surveying structures and in particular for optically producing photographically recorded tunnel sections. The light plane emitted from the device has high intensity and resolution and serves to illuminate a line profile of the tunnel in the light plane. The photographic image obtained has good contrast and quality and permits on-line numerical analysis to detect deformations.

REFERENCES:
patent: 3168023 (1965-02-01), Harmon
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patent: 3776641 (1973-12-01), Northcutt et al.
patent: 3820903 (1974-06-01), Kindl et al.
patent: 3982839 (1976-09-01), Schwartz
patent: 4031629 (1977-06-01), Paluck
patent: 4052712 (1977-10-01), Ohama et al.
patent: 4063283 (1977-12-01), Rider et al.
patent: 4367021 (1983-01-01), Nordgren et al.
patent: 4396942 (1983-08-01), Gates

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