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Long-trace profiler with cyclic optical configuration.

Sanjib Chatterjee1, Y Pawan Kumar

  • 1Centre for Advanced Technology, Department of Atomic Energy, Indore, India. schatt@cat.ernet.in

Applied Optics
|October 10, 2002
PubMed
Summary
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A new, simpler optical setup for the long-trace profiler (LTP) maintains measurement accuracy. This simplified configuration reduces geometrical alignment challenges for precise surface metrology.

Area of Science:

  • Optics and Metrology
  • Surface Characterization

Background:

  • The long-trace profiler (LTP) is a critical instrument for high-precision surface metrology.
  • Existing LTP configurations often involve complex optical paths and alignment procedures.

Purpose of the Study:

  • To develop and present a simplified optical configuration for the long-trace profiler (LTP).
  • To maintain high measurement accuracy with a less complex instrumental setup.

Main Methods:

  • Development of a novel, cyclic optical configuration for the LTP.
  • Utilizing closely spaced, laterally separated laser beams to achieve zero optical path difference.

Main Results:

  • The simplified optical configuration significantly reduces geometrical alignment complexity.

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  • Measurement accuracy is comparable to widely used, more complex LTP designs.

    • Conclusions:

    • A simpler LTP optical configuration is feasible without compromising measurement accuracy.
    • This advancement simplifies instrument setup and maintenance in surface metrology applications.