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Browse Prior Art Database

Micro Lens Securement Using a Reforming Solder Ball

IP.com Disclosure Number: IPCOM000108159D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 56K

Publishing Venue

IBM

Related People

Carden, G: AUTHOR [+3]

Abstract

Disclosed is a process for accurately securing a micro lens in an optical subassembly. By using a reforming solder ball that conforms to the contour of the lens surface, precise alignment can be secured and maintained.

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This is the abbreviated version, containing approximately 100% of the total text.

Micro Lens Securement Using a Reforming Solder Ball

      Disclosed is a process for accurately securing a micro lens in
an optical subassembly.  By using a reforming solder ball that
conforms to the contour of the lens surface, precise alignment can be
secured and maintained.

      Securement of the optical lens shown in the figure is achieved
by the placement of a reforming solder ball between the set screw and
the optical lens.  As the set screw becomes tightened, the solder
ball that is between the lens and the set screw conforms to the
surrounding surfaces. This induces a radial equalization force that
secures the optical lens and maintains the precision alignment.  The
equalization force also acts as a locking device for the set screw,
preventing it from loosening.

      In addition, the reforming solder ball prevents damage to the
optical lens during securement.  By equalizing the force applied
during securement, the lens is less likely to be cracked or damaged,
unlike when the set screw has direct contact with the lens.  Direct
contact of the set screw to the optical lens results in a scored lens
due to radial rotation of the set screw.  This creates a stress
fracture in the optical lens resulting in a cracked or damaged lens
as securement forces are applied.

      Disclosed anonymously.