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Bearing Alignment Auto Collimator

IP.com Disclosure Number: IPCOM000046696D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Burke, MJ: AUTHOR

Abstract

A conventional auto collimator has no provision for selective illumination of the surface to be aligned. In the case where the object to be aligned has several reflecting surfaces, it may not be possible to distinguish between them. The modified auto collimator shown in the drawing has an additional lens and aperture to provide selective illumination of the surface to be tested. A light source is brought to a focus in the plane of aperture A1 by means of lens L1. Lenses L2 and L3 create an image of aperture A1 on the surface of the bearing which is to be aligned. Aperture A2 determines the width of the collimated beam and therefore the amount of light which reaches the bearing surface.

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Bearing Alignment Auto Collimator

A conventional auto collimator has no provision for selective illumination of the surface to be aligned. In the case where the object to be aligned has several reflecting surfaces, it may not be possible to distinguish between them. The modified auto collimator shown in the drawing has an additional lens and aperture to provide selective illumination of the surface to be tested. A light source is brought to a focus in the plane of aperture A1 by means of lens L1.

Lenses L2 and L3 create an image of aperture A1 on the surface of the bearing which is to be aligned. Aperture A2 determines the width of the collimated beam and therefore the amount of light which reaches the bearing surface. Since aperture A2 is positioned at the focal point of lens L3, an image of the aperture is created at the position detector by the beam splitter. Any misalignment of the bearing will cause the position of the image of A2 to shift in the plane of the position detector. The shape of aperture Al can be tailored to match the shape of the bearing to be aligned. Since the side of the inner race is customarily used for alignment purposes, this aperture can be in the shape of an annulus.

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