Browse Prior Art Database

Optics Alignment

IP.com Disclosure Number: IPCOM000088360D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Janeway, DL: AUTHOR

Abstract

Lens 10, splitter mirror 11, and diode arrays 12 and 13 for a scanner are mounted as a single subassembly to obtain precise alignment. Each of the units or items forming the subassembly is itself a subassembly which is internally and separably alignable, making the system alignment relatively easy.

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Optics Alignment

Lens 10, splitter mirror 11, and diode arrays 12 and 13 for a scanner are mounted as a single subassembly to obtain precise alignment. Each of the units or items forming the subassembly is itself a subassembly which is internally and separably alignable, making the system alignment relatively easy.

Actual alignment consists of three major operations. The object to be scanned must be aligned parallel to, and a specific distance from, the carriage guiding rails. Next, the subassembly locating jackscrews, that define the reference plane, are aligned relative to these rails. When the subassembly is placed on the carriage, and this assembly placed on the rails, the system is aligned.

Alignment of the items on the carriage and of the object to be scanned to the rails involves only a few precise distance measurements. Measurements of positions on the carriage are made on a fixture simulating the rails. This fixture can be placed on a machinist's granite surface block for ease of measurement.

The subassembly-aligning fixture has a back lighted target at the same distance in front of the reference plane on the fixture as in the correctly aligned optical system. The subassembly is attached to the fixture on locating jackscrews identical to the ones on the carriage. The body 14 and lens are then adjusted for a focused image of the target at the correct positions relative to the two array mounting locations 15. The splitter mirror 11 is adjusted to give a se...