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Fast one-dimensional profilometer with a compact disc pickup.

A Bartoli, P Poggi, F Quercioli

    Applied Optics
    |March 22, 2008
    PubMed
    Summary
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    This study introduces a low-cost, one-dimensional optical profilometer using a compact disc (CD) pickup for both sensing and actuation. This innovative design offers a fast, compact, and affordable solution for surface profiling, especially in challenging environments.

    Area of Science:

    • Optical Engineering
    • Metrology
    • Instrumentation

    Background:

    • Optical profilometry commonly utilizes compact disc (CD) pickups.
    • Existing commercial instruments are prohibitively expensive due to high scanning system costs.
    • Current systems often incorporate bulky and slow translation stages.

    Purpose of the Study:

    • To develop a cost-effective and compact one-dimensional optical profilometer.
    • To leverage a CD pickup as both a sensor and an actuator.
    • To overcome the limitations of existing expensive and cumbersome profilometry systems.

    Main Methods:

    • A novel profilometer design employing a CD pickup.
    • Utilizing the objective lens tracking motor for beam scanning.
    • Integrating sensing and actuation functions within the CD pickup.

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    Main Results:

    • The developed profilometer is significantly cheaper than commercial alternatives.
    • The device achieves fast scanning speeds.
    • The system is compact, lightweight, and suitable for various applications.

    Conclusions:

    • The CD pickup-based profilometer presents a valuable, low-cost solution for surface profiling.
    • This approach is particularly advantageous for profiling fluid or hard-to-access surfaces.
    • The design overcomes the cost and bulk limitations of traditional optical profilometers.