Browse Prior Art Database

Laser Lens Light Pencil

IP.com Disclosure Number: IPCOM000103173D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 46K

Publishing Venue

IBM

Related People

Grant, D: AUTHOR [+3]

Abstract

Disclosed is a assembly for joining a laser diode and lens to form a compact collimated light source.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Laser Lens Light Pencil

      Disclosed is a assembly for joining a laser diode and lens to
form a compact collimated light source.

      Light sources used in optical storage heads require a high
degree of collimation, low pointing error, and centration of the
laser's power in the lens pupil.   In order to achieve this
alignment, the coupling hardware between the laser source and the
collimation lens must allow for adjustments with 5 degrees of freedom
during alignment as well as rigid locking of all components at best
alignment. There is the additional requirement that the finished
module be rotatable about its axis for proper orientation of the
polarization vector.  To meet all these requirements in a production
environment we suggest the use of a lens sleeve, and a mechanical
element having a planar surface facing the collimator and a spherical
surface toward the laser.  The center of curvature lies beyond the
laser source as shown in the figure. The planar surface allows for X
and Y translation while the spherical elements permit rx and ry
adjustments. All are essential in setting pointing and centration.
Focus is adjusted by moving the lens in its sleeve which is designed
as a thick split ring.  The various elements are locked together by
either bonding, crimping, or welding.

      Disclosed anonymously.