Laser unit with a laser beam automatically aligned to the vertic

Details Laser unit with a laser beam automatically aligned to the vertic Laser unit with a laser beam automatically aligned to the vertic

1975-03-28

1977-08-09

McGraw, Vincent P.

Optics: measuring and testing

Fiducial instruments

Artificial reference

356148, 350287, G01C 918

Patent

active

040407527

ABSTRACT:
Laser unit for directing a laser beam in a strictly vertical direction, comprising a laser proper having a substantially vertical axis, an afocal system, an optical device for automatically correcting the verticality of the laser beam, and a base structure provided with means for supporting the assembly of said laser, afocal system and optical device in such position that the laser axis be substantially vertical. This invention is applicable to all fields and techniques in which it is desired to determine with the maximum precision the vertical at a given locus where the laser is installed.

REFERENCES:
patent: 1285775 (1918-11-01), Mihalyi
patent: 2147156 (1939-02-01), Geffchen et al.
patent: 3324557 (1967-06-01), Hodges
patent: 3655274 (1972-04-01), Craig
patent: 3684381 (1972-08-01), Zoot
patent: 3729266 (1973-04-01), Mason et al.
patent: 3771876 (1973-11-01), Ljungdahl et al.
patent: 3858984 (1975-01-01), Denton et al.

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