Optical instruments

Details Optical instruments Optical instruments

1981-09-08

1984-01-03

Punter, William H.

Optics: measuring and testing

Angle measuring or angular axial alignment

Alignment of axes nominally coaxial

350562, 356138, 356255, 356371, G01B 1127, B02B 2732

Patent

active

044239572

ABSTRACT:
An optical instrument for measuring the divergence of two approximately colinear optical axes comprises an afocal telescope having a comparator disposed transversely to its longitudinal axis, the comparator comprising a beam splitter, an eyepiece and a graticule. The instrument is used in conjunction with a mirror disposed orthogonally with respect to one of the optical axes, the telescope being approximately aligned with the other optical axis and disposed so that light rays passing through it are reflected back by the mirror to the beam splitter and hence to the eyepiece. The instrument is insensitive to small inaccuracies in telescope alignment and is particularly applicable to testing the accuracy of a gun sight, in which application it may be hand held.

REFERENCES:
patent: 1012715 (1911-12-01), Saegmu/ ller
patent: 2402856 (1946-06-01), Turrettini
patent: 2701501 (1955-02-01), Cuny
patent: 3049972 (1962-08-01), Malinowski
patent: 3355979 (1967-12-01), Wirtanen
patent: 3518005 (1970-06-01), Weber
patent: 3542478 (1970-11-01), Dessus
Anstiss, R., "Optical Alignment Device for Lasers", Optics Technology, 5-1970, pp. 102.

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