Browse Prior Art Database

Replacement Laser for Scanner

IP.com Disclosure Number: IPCOM000120467D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Cowardin, RL: AUTHOR [+2]

Abstract

Disclosed is a process for manufacture of a scanner laser assembly which minimizes the effect of tolerances. This method also reduces the effect on performance of field replacement of lasers.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 87% of the total text.

Replacement Laser for Scanner

      Disclosed is a process for manufacture of a scanner laser
assembly which minimizes the effect of tolerances.  This method also
reduces the effect on performance of field replacement of lasers.

      The laser assembly consists of a die cast aluminum cradle with
the laser tube bonded in place.  The cradle has three flat areas and
two dowel pins which locate it in the scanner housing.  The scanner
housing has three raised machined bosses and two dowel pin holes
which match the cradle.  Tolerances can be specified to locate the
cradle to the scanner housing with any degree of accuracy deemed
necessary by the designer.

      During assembly, the cradle is mounted in a fixture exactly as
it would be in the scanner, a bead of UV curing silicon rubber
adhesive is applied to two areas on the cradle and the laser tube is
placed in the cradle.  The laser tube itself is held in a fixture
which allows it to be positioned with respect to the cradle.  The
laser is ignited and the tube is manipulated so that the beam can be
directed onto targets, either pinholes or x-y grids, which allow the
alignment to be set to the desired tolerances.  Once the tube is
aligned with respect to the cradle, a UV light source is used to cure
the adhesive to complete the assembly.  The laser assembly is shown
in Fig. 1.

      Lasers assembled in this manner can be placed in any scanner
housing and it can be expected that the beam location will b...