Laser deflection apparatus for a conical laser reference...

G - Physics – 01 – C

Patent

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G01C 9/06 (2006.01) G01C 15/00 (2006.01)

Patent

CA 2135368

An apparatus for projecting a laser beam at an angle to an axis and sweeping the laser beam around the axis around a conical surface having a selected slope is described. The apparatus may be used to aid in the alignment of structures having conical surfaces. The apparatus projects a laser beam along an axis onto a rotating deflection assembly. The deflection assembly contains two mirrors which are optically equivalent to the reflective faces of a pentaprism. Consequently, the angle of the deflected beam is relatively insensitive to vibrations of the deflection assembly. The angle of the deflected beam may be varied by tilting the two mirrors. The alignment of the mirrors is maintained as the mirrors are tilted by a linkage which includes a roller mounted to one of the mirrors which rides on a cam surface coupled to the other mirror. The adjustable mirror-alignment linkage may be used in other optical equipment.

Appareil servant à projeter un rayon laser sous un certain angle par rapport à un axe et à balayer le rayon autour de cet axe et autour d'une surface conique à inclinaison déterminée. L'appareil peut contribuer à aligner des structures à surfaces coniques en projetant un rayon laser, le long d'un axe, sur un dispositif de déviation rotatif comprenant deux miroirs optiquement équivalents aux faces réfléchissantes d'un prisme pentagonal. Par conséquent, l'angle du rayon dévié est relativement insensible aux vibrations du dispositif de déviation. L'angle du rayon dévié peut être modifié en inclinant les deux miroirs. Pendant l'inclinaison, l'alignement des miroirs est maintenu par une tringlerie, qui comprend un cylindre monté sur un des miroirs, et qui roule sur un élément à came relié à l'autre miroir. La tringlerie réglable servant à l'alignement des miroirs peut également servir pour d'autres types d'équipements optiques.

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