Browse Prior Art Database

Fine-Tracking Mechanism by Moving Silicon Laser Mount

IP.com Disclosure Number: IPCOM000105939D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 6 page(s) / 111K

Publishing Venue

IBM

Related People

Furuhata, T: AUTHOR [+2]

Abstract

Described is a mechanism for the optical storage. This mechanism has 2 characters; a) the laser mount itself is directly driven by electro-magnetic or electro-static force, which achieves better mechanical controllability than the conventional one which has moving reflection mirror (Fig. 1a and b) the laser mount is fabricated by applying MEMS (Micro Electro-Mechanical Systems) technology.

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Fine-Tracking Mechanism by Moving Silicon Laser Mount

      Described is a mechanism for the optical storage.  This
mechanism has 2 characters; a) the laser mount itself is directly
driven by electro-magnetic or electro-static force, which achieves
better mechanical controllability than the conventional one which has
moving reflection mirror (Fig. 1a and b) the laser mount is
fabricated by applying MEMS (Micro Electro-Mechanical Systems)
technology.

      The spec.  required for the fine tracking mechanism of the
optical stage follows: (1) the movement range of the mechanism is 20
micron (i.e., plus minus 10 micron), (2) the difference between first
and second resonance frequency is over several 10kHz.  (3) the size
of the mechanism is smaller than 10mm x 10mm x 10mm.  No need of
saying, the laser mount mechanism satisfy all above requests.

      In the conventional fine tracking system, "galvano" mirror is
used.  The fine tracking is achieved by tilting the reflection mirror
which is placed on the way.  In this mechanism, high speed and small
volume, is difficult to achieve in the same time because the mirror
moves rotational direction.  In this directional movement, resonance
frequency is close to the first resonant mode (up and down
direction), and it is difficult to control it separately.  From this
point, the proposed mechanism has great merit; the laser mount itself
moves up and down but not rational direction in the fine tracking.
The mount is s...