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An Optical Alignment Fixture

IP.com Disclosure Number: IPCOM000098500D
Original Publication Date: 1960-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Longwell, FP: AUTHOR

Abstract

This optical alignment fixture is used to align a piece of equipment about three mutually perpendicular axes. It consists of a box which has a mirror with a hole in the center mounted on one vertical exterior surface and a sensitive bubble level mounted on the bottom inside surface. The inside of the box also contains a combination of mirrors and a collimating lens which project the image of the bubble through the hole in the mirror.

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An Optical Alignment Fixture

This optical alignment fixture is used to align a piece of equipment about three mutually perpendicular axes. It consists of a box which has a mirror with a hole in the center mounted on one vertical exterior surface and a sensitive bubble level mounted on the bottom inside surface. The inside of the box also contains a combination of mirrors and a collimating lens which project the image of the bubble through the hole in the mirror.

In operation, the box is mounted on the equipment to be measured and an auto collimating telescope (not shown) is adjusted so that the image of its crosshairs reflected by the mirror can be seen in the eye piece. If the collimator is perpendicular to the mirror and the fixture is horizontal, the observer sees in the eye piece the illuminated crosshair superimposed on the reticle with the image of the bubble centered on the crosshair. Motion in pitch or azimuth rotates the mirror and causes the crosshair image to be displaced from the center of the reticle. Motion in roll causes the bubble to shift from its original position.

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