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Browse Prior Art Database

Light Source Alignment

IP.com Disclosure Number: IPCOM000087483D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Grant, DE: AUTHOR [+2]

Abstract

To facilitate the exchange of a light source subsystem, e.g., a laser, in a complex optical system of several subsystems, a single alignment fixture 1 is used to adjust all subsystems including the light source subsystem.

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Light Source Alignment

To facilitate the exchange of a light source subsystem, e.g., a laser, in a complex optical system of several subsystems, a single alignment fixture 1 is used to adjust all subsystems including the light source subsystem.

First, an alignment light source 2 consisting of a small diameter collimated beam 3 is used as a base reference. Beam 3 is centered onto both detectors D1 and D2. Also, beam 3 can be centered by reflection off a thin wedge prism 6 onto detector D3 if subsystem 5 is in place.

Then, light source subsystem 4 replaces alignment light source 2 and its beam 3, and is adjusted onto detector D1 and D2. Mechanical reference means, e.g., locating pins, are the same on fixture 1 and the final optical system. Therefore, accurate installation of subsystem 4 in the final system is insured.

Next, an optical subsystem 5 to be aligned replaces detector D1 and, with alignment light source 2 in its place, its output beam 3 is centered onto detectors D2 and D3. Mechanical reference, as before, is identical on fixture 1 and the final optical system. Therefore, correct installation is guaranteed.

With the alignment light source 2 in its place, this procedure may be repeated for other optical subsystems in place of subsystem 5.

In all cases, accurate positioning is insured by identical reference means on fixture 1 and the final system. Thus, in the final system, any subsystem including the light source subsystem may be exchanged without affectin...