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Laser Alignment Tool

IP.com Disclosure Number: IPCOM000079658D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Barton, LJ: AUTHOR

Abstract

The tool shown in the figure is used to accurately align a laser beam normal to the planar surface. The base 1 of the tool is circular and is accurately machined to provide a datum surface. A spike 2 projecting from the center of the opposite side of the base 1 has a partially silvered conical part 3. The included angle of the point 3 is 90 degrees and is symmetrical about a line normal to the center of the base. Two accurately machined surfaces 4, 5 surround the spike 2. Surface 4 is at right angles to the base 1 and is concentric with the normal through the point of the spike 2. Surface 5 slopes upwards away from the spike and is provided with a number of scribed circles, not shown, also concentric with the point of the spike 2.

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Laser Alignment Tool

The tool shown in the figure is used to accurately align a laser beam normal to the planar surface. The base 1 of the tool is circular and is accurately machined to provide a datum surface. A spike 2 projecting from the center of the opposite side of the base 1 has a partially silvered conical part 3. The included angle of the point 3 is 90 degrees and is symmetrical about a line normal to the center of the base. Two accurately machined surfaces 4, 5 surround the spike 2. Surface 4 is at right angles to the base 1 and is concentric with the normal through the point of the spike 2. Surface 5 slopes upwards away from the spike and is provided with a number of scribed circles, not shown, also concentric with the point of the spike 2.

In operation, the base 1 is supported in close contact with the planar surface to which the beam is to be aligned. The incident laser beam 6 is directed onto the point of the spike 2 and is reflected outwards from the silvered portion 3. Depending on the accuracy of the initial alignment, some or all of the reflected light 7 will fall on parts of the two surrounding surfaces 4, 5. The position of the laser is then adjusted until the light reflected from the point falls on one of the inscribed concentric circles on surface 5. On removal of the tool, the incident beam 6 is accurately aligned at right angles to the planar surface.

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